Interaction dynamics between endophytic biocontrol agents and pathogen in the host plant studied via quantitative real-time polymerase chain reaction (qPCR) approach
This study represents the first report on the simultaneous monitoring of pathogen and endophytic BCA in a host plant model via real-time PCR.Graphical abstract (Source: Biological Control)
Source: Biological Control - July 6, 2018 Category: Biology Source Type: research

Antifungal and plant growth-promoting activities of Streptomyces roseoflavus strain NKZ-259
Publication date: October 2018Source: Biological Control, Volume 125Author(s): Liming Shi, Thinn Thinn Nwet, Beibei Ge, Wenjun Zhao, Binghua Liu, Hailan Cui, Kecheng ZhangAbstractBiocontrol approach, using beneficial microorganisms, is becoming an important alternative to the use of chemical fungicides to control crop diseases. Therefore there is a need to found new effective biocontrol agents. Herein, a bacterial strain named NKZ-259 was isolated from soil samples obtained from Qilian Mountain, Qinghai, using the dilution plate method and streak plate technique. Strain NKZ-259 was identified as Streptomyces roseoflavus ba...
Source: Biological Control - July 6, 2018 Category: Biology Source Type: research

Antifungal and plant growth-promoting activities of Streptomyces roseoflavus strain NKZ-259
Publication date: October 2018 Source:Biological Control, Volume 125 Author(s): Liming Shi, Thinn Thinn Nwet, Beibei Ge, Wenjun Zhao, Binghua Liu, Hailan Cui, Kecheng Zhang Biocontrol approach, using beneficial microorganisms, is becoming an important alternative to the use of chemical fungicides to control crop diseases. Therefore there is a need to found new effective biocontrol agents. Herein, a bacterial strain named NKZ-259 was isolated from soil samples obtained from Qilian Mountain, Qinghai, using the dilution plate method and streak plate technique. Strain NKZ-259 was identified as Streptomyces roseoflavus based o...
Source: Biological Control - July 4, 2018 Category: Biology Source Type: research

Host utilization, reproductive biology, and development of the larval parasitoid Tetrastichus planipennisi as influenced by temperature: Implications for biological control of the emerald ash borer in North America
Publication date: October 2018 Source:Biological Control, Volume 125 Author(s): Jian J. Duan, Jonathan M. Schmude, Xiao-Yi Wang, Timothy J. Watt, Leah S. Bauer The success of classical biological control programs depends in part on understanding climate effects on introduced agents. Tetrastichus planipennisi Yang (Hymenoptera: Eulophidae), a larval endoparasitoid of emerald ash borer (EAB), Agrilus planipennis Fairmaire (Coleoptera: Buprestidae), is being introduced to EAB-invaded regions of the United States (USA) and Canada for biological control. To optimize regional release strategies and increase efficiency of the EA...
Source: Biological Control - June 30, 2018 Category: Biology Source Type: research

Pre-selection in laboratory tests of survival and competition before field screening of antagonistic bacterial strains against Botrytis bunch rot of grapes
Publication date: September 2018 Source:Biological Control, Volume 124 Author(s): Carlos Calvo-Garrido, Rana Haidar, Jean Roudet, Thomas Gautier, Marc Fermaud With only a few biocontrol products currently registered against Botrytis bunch rot (BBR) of grapes, there is a crucial need for new antagonistic strains that are able to survive and efficiently suppress B. cinerea under vineyard conditions. The aim of this study was to establish and follow a pre-selection process among potential antagonistic bacterial strains, previously identified in vivo for efficacy, and to carry out a further field screening assay using a reduc...
Source: Biological Control - June 27, 2018 Category: Biology Source Type: research

Chitosan and Pichia membranaefaciens control anthracnose by maintaining cell structural integrity of citrus fruit
Publication date: September 2018 Source:Biological Control, Volume 124 Author(s): Yijie Zhao, Lili Deng, Yahan Zhou, Shixiang Yao, Kaifang Zeng This work evaluated effects of chitosan and Pichia membranaefaciens treatments on anthracnose control of cell membrane and cell wall structure in citrus fruit (Citrus sinensis L. Osbeck). Pathogen infection can cause cell membrane destruction and cell wall degradation. The disease incidence and lesion diameter on chitosan- and P. membranaefaciens- treated citrus was significantly reduced, especially P. membranaefaciens. Moreover, those treatments all could regulate reactive oxygen...
Source: Biological Control - June 27, 2018 Category: Biology Source Type: research

Biotic aspects involved in the control of damping-off producing agents: The role of the thermotolerant microbiota isolated from composting of plant waste
Publication date: September 2018 Source:Biological Control, Volume 124 Author(s): N. Sánchez San Fulgencio, F. Suárez-Estrella, M.J. López, M.M. Jurado, J.A. López-González, J. Moreno Along with the high temperatures generated during the composting process, the microbial community of a compost pile collaborates actively in the control of damping-off producing agents. Such collaboration could be justified on the basis of the ability of the microbiota to produce fungicide substances that are involved in the control of damping-off or other bioactive compounds that affect the growth promotio...
Source: Biological Control - June 27, 2018 Category: Biology Source Type: research

The effects of prey distribution and digestion on functional response of Harmonia axyridis (Coleoptera: Coccinellidae)
Publication date: September 2018 Source:Biological Control, Volume 124 Author(s): Yi Feng, Zhao-Xu Zhou, Meng-Ru An, Xing-Lin Yu, Tong-Xian Liu The effects of prey distribution and digestion on the functional response of an invertebrate predator Harmonia axyridis (Pallas) to varying densities of Aphis citricola (van der Goot) were investigated. Experiments were conducted in petri dish and wind tunnels with multiple plants to present conditions in which the predator could behave more naturally. To discriminate if the functional response of H. axyridis is digestion or handling limited, numbers of aphids consumed were measur...
Source: Biological Control - June 27, 2018 Category: Biology Source Type: research

Compost as a carrier medium for entomopathogenic nematodes – The influence of compost maturity on their virulence and survival
Publication date: October 2018 Source:Biological Control, Volume 125 Author(s): Gisèle L. Herren, Isabelle Binnemans, Lisa Joos, Nicole Viaene, Ralf-Udo Ehlers, Bart Vandecasteele, Wim Bert, Hanne Steel The effectiveness of entomopathogenic nematodes (EPN) against pest insects is largely dependent on the method of application and nematode survival under field conditions. Nematodes must persist long enough to control pest populations, despite sensitivity to abiotic factors such as desiccation and UV light. Here we investigate the use of compost as a carrier medium for the entomopathogenic nematode Steinernema feltia...
Source: Biological Control - June 27, 2018 Category: Biology Source Type: research

Lipopeptides from Bacillus sp. EA-CB0959: Active metabolites responsible for in vitro and in vivo control of Ralstonia solanacearum
Publication date: October 2018 Source:Biological Control, Volume 125 Author(s): Valeska Villegas-Escobar, Lina María González-Jaramillo, María Ramírez, Ruth Natalia Moncada, Laura Sierra-Zapata, Sergio Orduz, Magally Romero-Tabarez Broadening the spectrum of action of microbial bioactive compounds is a priority nowadays. From a collection of 1493 aerobic endospore forming bacteria, 3.1% (47) inhibited Serratia marcescens and were highly active against R. solanacearum. Thirty-six of these strains were identified as part of the ‘Operational Group B. amyloliquefaciens’, denoting the po...
Source: Biological Control - June 27, 2018 Category: Biology Source Type: research

Interaction dynamics between endophytic biocontrol agents and pathogen in the host plant studied via quantitative real-time polymerase chain reaction (qPCR) approach
This study represents the first report on the simultaneous monitoring of pathogen and endophytic BCA in a host plant model via real-time PCR. Graphical abstract (Source: Biological Control)
Source: Biological Control - June 26, 2018 Category: Biology Source Type: research

Biological control of Salvinia molesta in South Africa revisited
Publication date: Available online 23 June 2018 Source:Biological Control Author(s): G.D. Martin, J.A Coetzee, P.S.R. Weyl, M.C. Parkinson, M.P. Hill The aquatic weed Salvinia molesta D.S. Mitch. (Salviniaceae) was first recorded in South Africa in the early 1900s, and by the 1960s was regarded as one of South Africa’s worst aquatic weeds. Following the release of the weevil, Cyrtobagous salviniae Calder and Sands (Coleoptera: Curculionidae) in 1985, the weed is now considered under successful biological control. However, the post-release evaluation of this biological control programme has been ad hoc, therefore, to...
Source: Biological Control - June 24, 2018 Category: Biology Source Type: research

The potential for using entomopathogenic nematodes and fungi in the management of the maize weevil, Sitophilus zeamais (Motschulsky) (Coleoptera: Curculionidae)
Publication date: Available online 21 June 2018 Source:Biological Control Author(s): George N. Mbata, Cleveland Ivey, David Shapiro-Ilan Maize (Zea mays L.) is an important cereal crop that is cultivated globally. In storage, maize is infested by the maize weevil (Sitophilus zeamais Motchulsky). In sub– Saharan Africa where maize is an important staple crop, infestation by S. zeamais is severe. Chemical pesticides have been the key pest management tools for this pest but these practices come with consequences such as insect resistance to pesticides, food and environmental contamination, and depletion of non-target s...
Source: Biological Control - June 22, 2018 Category: Biology Source Type: research

Compost as a carrier medium for entomopathogenic nematodes - the influence of compost maturity on their virulence and survival
Publication date: Available online 21 June 2018 Source:Biological Control Author(s): Gisèle L. Herren, Isabelle Binnemans, Lisa Joos, Nicole Viaene, Ralf-Udo Ehlers, Bart Vandecasteele, Wim Bert, Hanne Steel The effectiveness of entomopathogenic nematodes (EPN) against pest insects is largely dependent on the method of application and nematode survival under field conditions. Nematodes must persist long enough to control pest populations, despite sensitivity to abiotic factors such as desiccation and UV light. Here we investigate the use of compost as a carrier medium for the entomopathogenic nematode Steinernema f...
Source: Biological Control - June 22, 2018 Category: Biology Source Type: research

Optimization of bio-insecticide production by Tunisian Bacillus thuringiensis israelensis and its application in the field
In conclusion, BUPM98, a local strain of B. thuringiensis israelensis, is very promising bioinsecticide for mosquito population management in Tunisia. (Source: Biological Control)
Source: Biological Control - June 22, 2018 Category: Biology Source Type: research

Metschnikowia citriensis sp. nov., a novel yeast species isolated from leaves with potential for biocontrol of postharvest fruit rot
Publication date: October 2018 Source:Biological Control, Volume 125 Author(s): Ye Liu, Shixiang Yao, Lili Deng, Jian Ming, Kaifang Zeng Two strains representing a yeast species of Metschnikowia were isolated from the surface of citrus leaves collected in Chongqing Province, China. Preliminary tests showed that this species has a biocontrol potential for inhibiting citrus green mold. This yeast species is most closely related to Metschnikowia koreensis based on the phylogenetic tree derived from neighbour-joining analysis of 26S rRNA gene D1/D2 domain. However, M. koreensis differs from this species by seven (1.5%) substi...
Source: Biological Control - June 22, 2018 Category: Biology Source Type: research

Significant increase in toxicity of the Cry1Ac1 protein of Bacillus thuringiensis by the exchange of two amino acids in its domain III
Publication date: Available online 19 June 2018 Source:Biological Control Author(s): Yaritza Reinoso-Pozo, Ma. Cristina Del Rincón-Castro, Jorge E. Ibarra The LBIT-1200 strain of Bacillus thuringiensis was recently isolated from soil, and showed high biochemical and genetic similarities with the HD-73 standard strain, besides expressing only a Cry1Ac protein: Cry1Ac39. However, LBIT-1200 was 6.4 and 9.5 times more toxic against Manduca sexta and Trichoplusia ni larvae, respectively, than HD-73, which expresses the Cry1Ac1 protein. Sequencing of Cry1Ac1 and Cry1Ac39 proteins showed only four amino acid differences, ...
Source: Biological Control - June 20, 2018 Category: Biology Source Type: research

Invasive Leptocybe spp. and their natural enemies: global movement of an insect fauna on eucalypts
Publication date: Available online 18 June 2018 Source:Biological Control Author(s): Ngoc Hoan Le, Helen F. Nahrung, Manon Griffiths, Simon Andrew Lawson The Eulophidae genus Leptocybe Fisher and La Salle and its type species L. invasa was first described in 2004 as an invasive galling pest causing serious damage to young eucalypts in the Middle East and Mediterranean. Believed to be of Australian origin, two cryptic species of Leptocybe have established throughout the world at an unprecedented rate. Australian parasitoids have been collected and released overseas for classical biocontrol of Leptocybe spp., some of which ...
Source: Biological Control - June 19, 2018 Category: Biology Source Type: research

“Lipopeptides from Bacillus sp. EA-CB0959: active metabolites responsible for in vitro and in vivo control of Ralstonia solanacearum”
Publication date: Available online 18 June 2018 Source:Biological Control Author(s): Valeska Villegas-Escobar, Lina María González-Jaramillo, María Ramírez, Ruth Natalia Moncada, Laura Sierra-Zapata, Sergio Orduz, Magally Romero-Tabarez Broadening the spectrum of action of microbial bioactive compounds is a priority nowadays. From a collection of 1493 aerobic endospore forming bacteria, 3.1% (47) inhibited Serratia marcescens and were highly active against R. solanacearum. Thirty-six of these strains were identified as part of the ‘Operational Group B. amyloliquefaciens’, denoting t...
Source: Biological Control - June 19, 2018 Category: Biology Source Type: research

Optimization of bio-insecticide production by TunisianBacillus thuringiensis israelensis and its application in the field
In conclusion, BUPM98, alocal strain of B. thuringiensis israelensis, is very promising bioinsecticide for mosquito population management in Tunisia. (Source: Biological Control)
Source: Biological Control - June 15, 2018 Category: Biology Source Type: research

Bioclimatic analyses of Trichomalus perfectus and Mesopolobus morys (Hymenoptera: Pteromalidae) distributions, two potential biological control agents of the cabbage seedpod weevil in North America
This study showed that variation in regional distributions may occur and these are likely based on differing tolerance to climatic conditions. Understanding these tolerances can enhance precision of ecological niche models that predict potential distributions of parasitoids for introduction as candidate biological control agents. Furthermore, the work reported here provides a basis for future research to determine if climate change may favour species such as M. morys that are adapted to warmer summer conditions. Graphical abstract (Source: Biological Control)
Source: Biological Control - June 14, 2018 Category: Biology Source Type: research

Effect of cold storage of Corcyra cephalonica eggs on the fitness for Trichogramma chilonis
In this study, we investigated the physicochemical property of fresh rice moth eggs (U) and sterilized eggs cold-stored at 4°C for 0 (CK), 15 (N15), 30 (N30), 45 (N45), and 60 (N60) days and evaluated the effect of cold storage of host eggs on the fitness of T. chilonis. The results showed that the moisture content, dry matter and pH of C. cephalonica eggs decreased significantly with increasing cold storage time. The survival rates of T. chilonis embryos, larvae and pupae decreased significantly when C. cephalonica eggs were cold-stored for more than 15 days. The fecundity rate of adult T. chilonis in refrigerated egg...
Source: Biological Control - June 10, 2018 Category: Biology Source Type: research

Microbiota from ‘next-generation green compost’ improves suppressiveness of composted Municipal-Solid-Waste to soil-borne plant pathogens
In this study, the pathogen-specific property of commercial composts to suppress Fusarium oxysporum f. sp. melonis wilt on melon has been enhanced transferring the multi-suppressive properties from seven ‘next-generation green composts’ made of agro-industrial residues and plant green-waste, including the steam-explosion liquid wastes derived from a 2nd-generation fuel ethanol production chain, into two composts made of Municipal-Solid-Waste (MSW) and one made of cow manure-household waste. After determination either of the physical-chemical features and suppressive properties of the starting composts, either o...
Source: Biological Control - June 8, 2018 Category: Biology Source Type: research

Plant identity, but not diversity, and agroecosystem characteristics affect the occurrence of M. robertsii in an organic cropping system
Publication date: Available online 5 June 2018 Source:Biological Control Author(s): Puneet K. Randhawa, Christina Mullen, Mary Barbercheck Organic farmers rely largely on cultural practices, such as crop rotation and cover cropping, and on biological control to manage pests. Winter cover crops add diversity to agroecosystems and can benefit soil conservation and health, retention and supply of soil nutrients, regulation of arthropods, and crop yields. Within the framework of a three-year experiment to investigate ecosystem services and disservices associated with 12 winter cover crop treatments during the transition of a ...
Source: Biological Control - June 6, 2018 Category: Biology Source Type: research

Optimization of phenyllactic acid production by Pediococcus acidilactici CRL 1753. Application of the formulated bio-preserver culture in bread
This study focused in the optimization of a low-cost medium to obtain biomass and PLA production by Pediococcus (Ped.) acidilactici CRL 1753 strain and propose its use as a liquid bio-preserver in bread making to increase the shelf life of wheat bread. First, the activity of CRL 1753 strain against filamentous fungi and yeasts was study and a wide antifungal inhibitory spectrum was observed. Using a factorial design 29-5 an optimized and low-cost medium (10 g/L meat peptone, 5 g/L yeast extract, 10 g/L glucose, 0.0038 g/L MnSO4, 6 g/L K2HPO4 and initial pH = 7.0) that could replace MRS was obtained. A signifi...
Source: Biological Control - May 27, 2018 Category: Biology Source Type: research

Identification and toxicological analysis of products of patulin degradation by Pichia caribbica
In this study, we used the yeast Pichia caribbica to degrade patulin effectively. The intermediate degradation products of patulin by P. caribbica were identified as (E)- and (Z)-ascladiol using high performance liquid chromatography and liquid chromatography-tandem mass spectroscopy. Only (E)-ascladiol was detected in the products of patulin degradation by intracellular enzymes. Toxic analyses on Escherichia coli Top10 cells, Arabidopsis thaliana, and human esophageal epithelial cells (Het-1a) showed that the intermediate degradation product ascladiol and the final degradation products were significantly less toxic and al...
Source: Biological Control - May 26, 2018 Category: Biology Source Type: research

Utilization of plant-derived food sources from annual flower strips by the invasive harlequin ladybird Harmonia axyridis
Publication date: July 2018 Source:Biological Control, Volume 122 Author(s): Sarah Wolf, Jörg Romeis, Jana Collatz The ability to utilize plant-derived food sources and suboptimal prey when the main prey is scarce may enhance competitiveness and invasiveness of entomophagous species such as Harmonia axyridis. Alternative food sources are particularly abundant in flower strips and other agri-environment schemes to promote biodiversity and may thus also benefit the invasive species. We investigated the effects of alternative food sources on the development and reproduction of H. axyridis. Laboratory experiments demonst...
Source: Biological Control - May 24, 2018 Category: Biology Source Type: research

Interactions between woodpecker attack and parasitism by introduced parasitoids of the emerald ash borer
This study examines the relationship between native woodpecker predation and parasitism by the introduced parasitoids S. agrili and T. planipennisi. We established a cohort of parasitized larvae on select ash trees and then used screening to exclude woodpeckers from some sections of the tree. We show that while woodpeckers had no effect on observed parasitism rates of individual trees, the presence of parasitized larvae changed woodpecker foraging behavior and resulted in significantly lower overall foraging by woodpeckers. We hypothesize these changes are due to these larval parasitoids being a lower quality food reward. ...
Source: Biological Control - May 24, 2018 Category: Biology Source Type: research

Integrating immunomarking with ecological and behavioural approaches to assess predation of Helicoverpa spp. larvae by wolf spiders in cotton
Publication date: July 2018 Source:Biological Control, Volume 122 Author(s): Dalila Rendon, James R. Hagler, Phillip W. Taylor, Mary E.A. Whitehouse Wolf spiders (Araneae: Lycosidae) are abundant ground predators in cotton fields that can provide important pest management services. These spiders can kill and consume larvae of the cotton bollworm Helicoverpa spp. (Lepidoptera: Noctuidae) that survive foraging on Bt cotton and descend from the plant to pupate in the soil. To determine predation frequency by wolf spiders in a Bt cotton field, we indirectly assessed predation using Helicoverpa spp. larvae marked with rabbit i...
Source: Biological Control - May 24, 2018 Category: Biology Source Type: research

Host selection and potential non-target risk of Dastarcus helophoroides, a larval parasitoid of the Asian longhorned beetle, Anoplophora glabripennis
Publication date: August 2018 Source:Biological Control, Volume 123 Author(s): Kaitlin Rim, Julian R. Golec, Jian J. Duan Dastarcus helophoroides Fairmaire (Coleoptera: Bothrideridae), an important parasitoid of the Asian longhorned beetle (ALB) (Anoplophora glabripennis (Coleoptera: Cerambycidae) (Motschulsky)) in Asia, is being evaluated for biocontrol of ALB in the United States. We assessed the responses of D. helophoroides to its native host, ALB, and a non-target surrogate, emerald ash borer (EAB), Agrilus planipennis (Fairmaire) (Coleoptera: Buprestidae), in their respective host plant substrates. Dastarcus helopho...
Source: Biological Control - May 24, 2018 Category: Biology Source Type: research

Mechanisms of action of the yeast Debaryomyces nepalensis for control of the pathogen Colletotrichum gloeosporioides in mango fruit
Publication date: August 2018 Source:Biological Control, Volume 123 Author(s): Yi Zhou, Wen Li, Jiaoke Zeng, Yuanzhi Shao The yeast Debaryomyces nepalensis was evaluated for effectiveness against Colletotrichum gloeosporioides in mangoes (Mangifera indica L.) cv. ‘Tainong No. 1’, and possible mechanisms of action involved in the inhibition were identified. The results showed that D. nepalensis could survive in mango wounds and produce a hydrolytic enzyme (β-1,3-glucanase). Scanning electron microscopy showed that the yeast produced biofilms on the mango surface and yeast cells attached to each other and b...
Source: Biological Control - May 24, 2018 Category: Biology Source Type: research

A β-carotene-amended artificial diet increases larval survival and be applicable in mass rearing of Harmonia axyridis
In conclusion, supplementation of β-carotene could increase the efficiency of artificial diet. On M. persicae, H. axyridis developed from AD-D had outstanding performance which was applicable for releasing in biological control. Our results highlight the importance of carotenoids in artificial diet and might provide a new approach for developing artificial diets. (Source: Biological Control)
Source: Biological Control - May 24, 2018 Category: Biology Source Type: research

Rearing and releasing the egg parasitoid Cleruchoides noackae, a biological control agent for the Eucalyptus bronze bug
Publication date: August 2018 Source:Biological Control, Volume 123 Author(s): Gonzalo Martínez, Andrés González, Marcel Dicke Biological control is a major tool for forest insect pest management. We initiated a biological control program for the Eucalyptus bronze bug, Thaumastocoris peregrinus, with the egg parasitoid Cleruchoides noackae. Parasitized eggs were imported from a mass rearing in Brazil, and a rearing colony was set up. The wasp was reared in plastic tubes each containing ten individuals that were offered 100 eggs of the bronze bug and a solution of water and honey. During 30 generations...
Source: Biological Control - May 24, 2018 Category: Biology Source Type: research

A simulation-based method to compare the pest suppression potential of predators: A case study with spiders
Publication date: August 2018 Source:Biological Control, Volume 123 Author(s): Jacinto Benhadi-Marín, José Alberto Pereira, David Barreales, José Paulo Sousa, Sónia A.P. Santos Assessing and comparing the pest killing capacity of predators is a crucial but laborious task during the implementation of sustainable farming systems. Critical attributes of assessment include quantifying predator’s attack rate (a) and handling time (Th). The maximum attack rate (T/Th) (i.e. the maximum number of prey that can be attacked by a predator during the time interval (T) considered) could be a more prec...
Source: Biological Control - May 24, 2018 Category: Biology Source Type: research

Tailoring insect biocontrol for high tunnels
Publication date: August 2018 Source:Biological Control, Volume 123 Author(s): L.L. Ingwell, D.A. Avila-Ruiz, R. Foster, I. Kaplan Augmentation biocontrol is an effective tool for managing greenhouse pests, but typically fails in open-field settings where dispersal and/or harsh environmental conditions prevent natural enemy establishment. Here, we provide the first experimental evaluation of biocontrol in high tunnels, a new and increasingly popular tool for season extension as part of the local food movement. High tunnels are a hybrid growth environment with characteristics of both greenhouse and field production; thus, ...
Source: Biological Control - May 24, 2018 Category: Biology Source Type: research

Nematophagus fungi increasing phosphorus uptake and promoting plant growth
Publication date: August 2018 Source:Biological Control, Volume 123 Author(s): Thalita Suelen Avelar Monteiro, Samuel Vasconcelos Valadares, Ingrid Ney Kramer de Mello, Bruno Coutinho Moreira, Maria Catarina Megumi Kasuya, Jackson Victor de Araújo, Leandro Grassi de Freitas Some nematophagous fungi control nematodes and are also able to compensate the damage they cause in plant roots. However, the effects of these fungi on plant growth promotion are still underexplored. Here, we evaluated if some nematophagus fungi (Pochonia chlamydosporia and Duddingtonia flagrans) may increase nutrient bioavailability and promote...
Source: Biological Control - May 24, 2018 Category: Biology Source Type: research

Biocontrol mechanisms of Bacillus sp., isolated from tomato rhizosphere, against Fusarium oxysporum f. sp. lycopersici
Publication date: August 2018 Source:Biological Control, Volume 123 Author(s): Monika Jangir, Ritika Pathak, Satyawati Sharma, Shilpi Sharma Bacillus sp. are well-known biocontrol agents against various fungal plant pathogens. The present work was conducted for characterization of antagonistic Bacillus sp., isolated from tomato rhizosphere, and its control mechanisms against Fusarium oxysporum f. sp. lycopersici. A collection of 49 Bacillus isolates was obtained from the rhizosphere of tomato plants from infested field. Dual culture antagonism assay was carried out to assess the potential role of the strains against the p...
Source: Biological Control - May 24, 2018 Category: Biology Source Type: research

Molecular characterization of the two postharvest biological control agents Aureobasidium pullulans L1 and L8
Publication date: August 2018 Source:Biological Control, Volume 123 Author(s): Alessandra Di Francesco, Matteo Calassanzio, Claudio Ratti, Marta Mari, Annibale Folchi, Elena Baraldi L1 and L8 are Aureobasidium pullulans strains previously shown to effectively act as biocontrol agents (BCA) against fruit postharvest pathogens. Here, L1 and L8 strains were tested in vivo against Monilinia laxa of peaches showing the ability to reduce the brown rot incidence by 95% and by 80% respectively. To develop future bioformulation and allow commercial use of these biocontrol agents (BCAs) it is necessary to develop specific identific...
Source: Biological Control - May 24, 2018 Category: Biology Source Type: research

The biocontrol by Streptomyces and Trichoderma of leaf spot disease caused by Curvularia oryzae in oil palm seedlings
This study aimed to apply the selected microorganisms Streptomyces hygroscopicus subsp. angustmyceticus NR8-2, Trichoderma harzianum TM2/1, and endophytic Trichoderma V76-12, to the control of leaf spot disease caused by Curvularia oryzae on oil palm leaves, in vitro, in vivo and in field conditions. The isolate V76-12 inhibited the growth of C. oryzae the most at 85.71% inhibition, followed by the isolates TM2/1 (75.71%) and NR8-2 (72.50%) in dual culture tests. Volatile antifungal effects were observed for V76-12 with 68% inhibition, followed by the isolates TM2/1 (45%) and NR8-2 (10%) in a bioassay. Crude metabolites of...
Source: Biological Control - May 24, 2018 Category: Biology Source Type: research

Implications of a phylogeographic approach for the selection of Ceutorhynchus assimilis as a potential biological control agent for Lepidium draba
Publication date: August 2018 Source:Biological Control, Volume 123 Author(s): Vincent Lesieur, Jean-François Martin, Hariet L. Hinz, Boris Fumanal, Rouhollah Sobhian, Marie-Claude Bon The root-galling weevil, Ceutorhynchus assimilis Paykull (Coleoptera, Curculionidae), has been selected as one of the candidates to control Lepidium draba L. (Brassicaceae), a highly invasive weed in western North America. Originally been described as oligophagous, also attacking crop species, previous studies indicated that a specific host race to L. draba exists in C. assimilis. We therefore explored the evolutionary history and ph...
Source: Biological Control - May 24, 2018 Category: Biology Source Type: research

Herbivore and parasitoid insects respond differently to annual and perennial floral strips in an alfalfa ecosystem
Publication date: August 2018 Source:Biological Control, Volume 123 Author(s): Makenzie Elena Pellissier, Randa Jabbour Non-crop flowering habitats have the potential to support natural enemies and improve biological control of insect crop pests. However, these habitats can also harbor pests. We evaluated the impact of annual and perennial flower mixtures on insect communities within a field crop landscape. The experiment consisted of alfalfa planted adjacent to strips of either an annual flower mix, a perennial flower mix, or control grass. Arthropods were vacuum collected from both the habitat strips and the adjacent al...
Source: Biological Control - May 24, 2018 Category: Biology Source Type: research

Selective soil bacteria to manage downy brome, jointed goatgrass, and medusahead and do no harm to other biota
Publication date: August 2018 Source:Biological Control, Volume 123 Author(s): Ann C. Kennedy Downy brome (cheatgrass, Bromus tectorum L., DB), jointed goatgrass (Aegilops cylindrica L., JG), and medusahead (Taeniatherum caput-medusae L. Nevski, MH) are annual invasive grass weeds that reduce cereal yields in cropland, negatively impact plant diversity, wildlife habitat, and forage potential in rangeland, and fuel wildfires. Methodical and comprehensive screening and selection of soil microbial populations identified cold-loving, weed-suppressive bacteria that had exclusive selectivity and did not harm other plants, even ...
Source: Biological Control - May 24, 2018 Category: Biology Source Type: research

The impact of soil treatments on black pod rot (caused by Phytophthora megakarya) of cacao in Cameroon
This study was undertaken under farmers’ field condition in the Centre region of Cameroon. Trichoderma asperellum PRR11, together with a water and fungicide (Ridomil Gold 66 WP) control, were applied on a three weeks basis over two consecutive production seasons. Weekly data collection consisted of counting healthy and diseased pods. For each treatment six replicate plots, each containing 16 trees, were used. Soil samples were taken at the beginning and end of the second season to determine the impact of the treatments on P. megakarya primary inoculum levels as well as the presence of fungal antagonists of P. megakar...
Source: Biological Control - May 24, 2018 Category: Biology Source Type: research

Potential of Macrocheles species (Acari: Mesostigmata: Macrochelidae) as control agents of harmful flies (Diptera) and biology of Macrocheles embersoni Azevedo, Castilho and Berto on Stomoxys calcitrans (L.) and Musca domestica L. (Diptera: Muscidae)
The objectives of this study were: a) to compare the predation and oviposition rates of three Macrocheles species, M. embersoni, M. muscaedomesticae and M. robustulus, on six prey species: S. calcitrans, Musca domestica , H. irritans, Bradysia matogrossensis, Rhizoglyphus echinopus and the free living nematode Rhabditella axei; b) to evaluate the life cycle of the best performing predator (M. embersoni) on the most suitable prey species at 30 ± 2 °C, 95 ± 5% RH and in the dark. The three macrochelid species consumed all evaluated prey species, but M. embersoni had higher predation and daily ovip...
Source: Biological Control - May 24, 2018 Category: Biology Source Type: research

Spatial and temporal dispersal patterns of Diachasmimorpha longicaudata (Hymenoptera: Braconidae) reared on Ceratitis capitata and Anastrepha fraterculus (Diptera: Tephritidae)
Publication date: Available online 15 April 2018 Source:Biological Control Author(s): Maria Gisely Camargos, Clarice Diniz Alvarenga, Ronaldo Reis Júnior, Julio Marcos Melges Walder, Jefferson Castro Novais The dispersal and parasitism abilities of Diachasmimorpha longicaudata, reared on the larval hosts Ceratitis capitata and Anastrepha fraterculus, were evaluated in a guava orchard. Eleven releases of approximately 3,000 parasitoids were conducted in a 15-ha orchard and wasp dispersal was monitored from 6 to 272 m away from a central release point. At each monitoring point, larvae of C. capitata and A. fraterculu...
Source: Biological Control - April 15, 2018 Category: Biology Source Type: research

Negative effect of global warming on biological control is mitigated by direct competition between sympatric parasitoids
Publication date: Available online 12 April 2018 Source:Biological Control Author(s): Ruth Cebolla, Alberto Urbaneja, Joan van Baaren, Alejandro Tena Parasitoids are among the most important and successful groups of natural enemies used in the biological control of insect pests. In most systems, several parasitoid species can parasitize the same pest. The coexistence of parasitoids in agroecosystems and their efficacy as biological control agents may be disrupted by global warming. An increase of approximately 3°C is predicted by the end of the twenty-first century in the Mediterranean basin (IPCC, 2014). In this cont...
Source: Biological Control - April 12, 2018 Category: Biology Source Type: research

Developmental stage affects the interaction of Steinernema carpocapsae and abamectin for the control of Phthorimaea operculella (Lepidoptera, Gelechidae)
Publication date: July 2018 Source:Biological Control, Volume 122 Author(s): Naser Eivazian Kary, Zahra Sanatipour, Davoud Mohammadi, Albrecht M. Koppenhöfer Laboratory bioassays were conducted to evaluate the interactions between an entomopathogenic nematode (EPN), Steinernema carpocapsae (Nematoda: Steinernematidae), and the insecticide abamectin against the Potato tuber moth (PTM), Phthorimaea operculella, one of the key insect pests of potatoes (Solanum tuberosum). Steinernema carpocapsae was highly virulent against pre-pupae but significantly less virulent against pupae with respective LC50 values of 10.5 and 10...
Source: Biological Control - April 12, 2018 Category: Biology Source Type: research

Biological control of soil transmitted helminths (STHs) in a zoological park by using saprophytic fungi
Publication date: Available online 11 April 2018 Source:Biological Control Author(s): J.A. Hernández, C.F. Cazapal-Monteiro, F.L. Arroyo, M.I. Silva, A.M. Palomero, A. Paz-Silva, R. Sánchez-Andrade, M.S. Arias Toxascaris leonina and Trichuris sp. are soil-transmitted helminths (STHs) infecting domestic and wild mammals. The antagonistic effect of the saprophytic filamentous fungi Mucor circinelloides and Verticillium sp. was examined on eggs of T. leonina passed in the feces of captive lynxes (Lynx lynx) kept in a zoological park. The activity of M. circinelloides and Trichoderma atrobrunneum was tested on e...
Source: Biological Control - April 11, 2018 Category: Biology Source Type: research

Efficacy of Bacillus spp. to biocontrol of anthracnose and enhance plant growth on Andean lupin seeds by lipopeptide production
The objective of this study was to evaluate four Bacillus strains with demonstrated abilities to control anthracnose on lupin seed to elucidate its mechanisms of antifungal activity. First, antifungal activity assays using living cells and cell-free compounds showed a strong ability to inhibit mycelial growth and conidial germination of C.acutatum. Based on these results, the two Bacillus strains that showed the highest antifungal activities were further screened for lipopeptide identification and the presence of lipopeptide genes. Thin layer chromatography (TLC) of butanolic extracts from cell-free compounds showed that b...
Source: Biological Control - April 11, 2018 Category: Biology Source Type: research

Evaluation of mycoparasitic efficacy of nematode-trapping fungi against Rhizoctonia solani inciting sheath blight disease in rice (Oryza sativa L.)
Publication date: Available online 10 April 2018 Source:Biological Control Author(s): Dharmendra Kumar, S. Amaresh Gouda Sheath blight incited by Rhizoctonia solani is an important rice disease that constitutes a major challenge to rice production worldwide. Nematode-trapping fungi possess the ability to capture, kill and digest the nematodes. However, the ability of many nematode-trapping fungi parasitizing the soil borne plant pathogens may fillip the gap towards maximum exploitation of these fungi in biological control strategy. In present study, we have investigated the mycoparasitc potential of Arthobotrys conoides, ...
Source: Biological Control - April 10, 2018 Category: Biology Source Type: research