Antagonistic potential of bacterial endophytes and induction of systemic resistance against collar rot pathogen Sclerotium rolfsii in tomato
Publication date: Available online 25 June 2019Source: Biological ControlAuthor(s): Pramod Kumar Sahu, Shailendra Singh, Amrita Gupta, Udai B. Singh, G.P. Brahmaprakash, Anil K. SaxenaAbstractA diverse pool of 310 bacterial endophytes isolated from tomato plants growing in the Indo-Gangetic plains of India was evaluated for their antagonistic potential against three soil-borne fungal pathogens causing root rot (Rhizoctonia solani), collar rot (Sclerotium rolfsii) and, fungal wilt (Fusarium oxysporum f. sp. lycopersici). Preliminary screening indicated that most of the isolates could inhibit R. solani and F. oxysporum f. sp...
Source: Biological Control - June 26, 2019 Category: Biology Source Type: research

Stepwise screening of candidate antagonists for biological control of Blumeria graminis f. sp. tritici
Publication date: September 2019Source: Biological Control, Volume 136Author(s): Jürgen Köhl, Helen Goossen-van de Geijn, Lia Groenenboom-de Haas, Betty Henken, Rüdiger Hauschild, Ulrike Hilscher, Carin Lombaers-van der Plas, Trudy van den Bosch, Mariann WikströmAbstractAntagonists for the biological control of Blumeria graminis f. sp. tritici were selected using a stepwise screening approach. Fungal colonizers of powdery mildew pustules were isolated from leaves of cereals and other plant species. Spore production, cold tolerance, drought tolerance and UV-B resistance as important characteristics for a...
Source: Biological Control - June 26, 2019 Category: Biology Source Type: research

Phytoseiid mites prey effectively on thrips eggs: evidence from predation trials and molecular analyses
Publication date: Available online 25 June 2019Source: Biological ControlAuthor(s): Viet Ha Nguyen, Wim Jonckheere, Duc Tung Nguyen, Gilberto José de Moraes, Thomas Van Leeuwen, Patrick De ClercqAbstractIt is generally assumed that predation by phytoseiid mites (Acarina: Phytoseiidae) on thrips is mainly limited to the first and, to a lesser extent, the second thrips instars. Thrips eggs are imbedded in plant tissue and are supposed to be out of reach of most predators. Using a dual approach combining feeding trials with molecular gut content analysis, we confirmed that eggs of the western flower thrips, Frankliniel...
Source: Biological Control - June 25, 2019 Category: Biology Source Type: research

Free conidia of entomopathogenic fungi modify quality traits by changing glutathione levels after an oxidant stimulus
In conclusion, despite the low metabolic activity in free conidia in a latency state, these responded to 26% O2 pulses, modifying quality traits and in some cases, inducing cross protection in a species-dependent response. The information of this research could be tested in harvested conidia used in the preparation of formulations for biological control. (Source: Biological Control)
Source: Biological Control - June 19, 2019 Category: Biology Source Type: research

The stealthiness of predatory mites as spider mite biological control agents
This study examined the stealthiness of three predatory mites: Phytoseiulus persimilis Athias-Henriot, Neoseiulus californicus McGregor, and Neoseiulus womersleyi Schicha. The first two species have been commercialized as spider mite biological control agents, whereas the last species is a native predator of spider mites in Japan. We measured two indices of predator stealthiness in bioassays using Tetranychus kanzawai Kishida as prey: the proportion of prey mites that dispersed from their patches in response to predator intrusion and the proportions of prey eggs laid on webs in response to predator eggs. Both indices resul...
Source: Biological Control - June 19, 2019 Category: Biology Source Type: research

Effect of polyamines and nitric oxide in Piriformospora indica-induced resistance and basal immunity of wheat against Fusarium pseudograminearum
In this study, capability of P. indica to protect wheat seedlings against Fusarium pseudograminearum, causing crown rot, was investigated and the role of polyamines (PAs) and nitric oxide (NO) as signal molecules involved in plant defense pathways in induced resistance by this endophytic fungus was evaluated in this pathosystem for the first time. Our results showed that P. indica did not have any antagonistic effect on F. pseudograminearum in vitro but considerably reduced the disease progress on wheat seedlings and detached leaves. Also, P. indica increased plant growth parameters compared to the controls in greenhouse. ...
Source: Biological Control - June 19, 2019 Category: Biology Source Type: research

Combination of low concentrations of fluazinam and antagonistic rhizobacteria to control avocado white root rot
Publication date: Available online 17 June 2019Source: Biological ControlAuthor(s): Juan M. Arjona-López, Sandra Tienda, Isabel Arjona-Girona, Francisco M. Cazorla, Carlos J. López-HerreraAbstractAvocado white root rot is a disease caused by the soil-borne pathogenic ascomycete Rosellinia necatrix Prill. In this work, we have carried out different experiments combining the contact fungicide fluazinam with biocontrol rhizobacterial strains of Pseudomonas chlororaphis and Bacillus subtilis, in order to reduce in vitro growth inhibition of R. necatrix and to control the disease in avocado plants. When combining ...
Source: Biological Control - June 18, 2019 Category: Biology Source Type: research

Laboratory Evaluation on the Predatory Efficacy of Naturally Occurring Toxorhynchites amboinensis Doleschall (Diptera:Culicidae) on Aedes aegyti Linn., Aedes albopictus (Skuse) and Culex quiquefasciatus Say (Diptera:Culicidae) Larvae in Cavite, Philippines
Publication date: Available online 18 June 2019Source: Biological ControlAuthor(s): Jonathan R. Digma, Augusto C. Sumalde, Cristina C. SalibayAbstractThe spread of arboviral disease in the Province of Cavite, Philippines has resulted to the declaration of state of calamities, contributes to disease burden and higher economic costs for the province and its population. The use of biological control agents like the naturally occurring non - hematophagous Toxorhynchites species with predatory capacity at its larval stage can be explored as an alternative approach to environmentally degrading chemical insecticides. Laboratory a...
Source: Biological Control - June 18, 2019 Category: Biology Source Type: research

The beauties and the bugs: A scenario for designing flower strips adapted to aphid management in melon crops
Publication date: September 2019Source: Biological Control, Volume 136Author(s): Alexandra Schoeny, Antoine Lauvernay, Jérôme Lambion, Christophe Mazzia, Yvan CapowiezAbstractFlower strips appear to be a promising lever for promoting pest control but a careful selection of the plant species used is needed prior to implementation to avoid possible negative side effects. In the case of open field melon crops, the main pitfall would be to generate aphid and aphid-borne virus reservoirs near the crops. Combining biotests under controlled conditions and data from the literature, we assessed 18 candidate plant speci...
Source: Biological Control - June 18, 2019 Category: Biology Source Type: research

Stepwise screening of candidate antagonists for biological control of Blumeria graminis f.sp. tritici
Publication date: Available online 13 June 2019Source: Biological ControlAuthor(s): Jürgen Köhl, Helen Goossen-van de Geijn, Lia Groenenboom-de Haas, Betty Henken, Rüdiger Hauschild, Ulrike Hilscher, Carin Lombaers-van der Plas, Trudy van den Bosch, Mariann WikströmAbstractAntagonists for the biological control of Blumeria graminis f. sp. tritici were selected using a stepwise screening approach. Fungal colonizers of powdery mildew pustules were isolated from leaves of cereals and other plant species. Spore production, cold tolerance, drought tolerance and UV-B resistance as important characteristics fo...
Source: Biological Control - June 14, 2019 Category: Biology Source Type: research

Attractiveness of uninfested vegetables to the omnivorous predators Dicyphus bolivari and D. errans (Hemiptera: Miridae) and their relative suitability for oviposition
Publication date: Available online 13 June 2019Source: Biological ControlAuthor(s): F. Madeira, S. Sossai, E. Edo, P. Pagès, N. Levi, R. AlbajesGraphical abstract (Source: Biological Control)
Source: Biological Control - June 13, 2019 Category: Biology Source Type: research

Effect of polyamines and nitric oxide in Piriformospora indica- induced resistance and basal immunity of wheat against Fusarium pseudograminearum
In this study, capability of P. indica to protect wheat seedlings against Fusarium pseudograminearum, causing crown rot, was investigated and the role of polyamines (PAs) and nitric oxide (NO) as signal molecules involved in plant defense pathways in induced resistance by this endophytic fungus was evaluated in this pathosystem for the first time. Our results showed that P. indica did not have any antagonistic effect on F. pseudograminearum in vitro but considerably reduced the disease progress on wheat seedlings and detached leaves. Also, P. indica increased plant growth parameters compared to the controls in greenhouse. ...
Source: Biological Control - June 12, 2019 Category: Biology Source Type: research

A Streptomyces sp. strain: isolation, identification, and potential as a biocontrol agent against soilborne diseases of tomato plants
In this study, we isolated an actinomycete strain, FJAT-31547, from the rhizosphere soil of a healthy tomato plant in a serious soilborne diseased field. The strain FJAT-31547 exhibited broad-spectrum antifungal and antibacterial activities against 6 species of phytopathogenic fungi and 7 species of phytopathogenic bacteria, especially Fusarium oxysporum and Ralstonia solanacearum. Based on morphological and physiological characteristics and 99.64% of 16S rRNA gene sequence similarity with Streptomyces diastaticus subsp. ardesiacus, the strain was identified as a member of the genus Streptomyces. Thirteen chemical compound...
Source: Biological Control - June 12, 2019 Category: Biology Source Type: research

Sense and nonsense of the secondary metabolites data requirements in the EU for beneficial microbial control agents
Publication date: Available online 10 June 2019Source: Biological ControlAuthor(s): Jacqueline W.A. Scheepmaker, Marloes Busschers, Ingvar Sundh, Jørgen Eilenberg, Tariq M. ButtAbstractMicrobial control agents (MCAs) are promising for use in sustainable agriculture. Nevertheless, they face a major hurdle in the registration process of the European Union, one reason being unclear data requirements on metabolites. This review examines the EU regulatory perspective on metabolites of MCAs for plant protection and identifies some key issues and concerns. Current data requirements for secondary metabolites of micro-organi...
Source: Biological Control - June 10, 2019 Category: Biology Source Type: research

Fengycin produced by Bacillus subtilis NCD-2 is involved in suppression of clubroot on Chinese cabbage
In this study, the biocontrol efficacy of B. subtilis NCD-2 against P. brassicae and the role of fengycin in disease suppression were evaluated on Chinese cabbage in glasshouse. B. subtilis NCD-2 reduced clubroot disease incidence and severity up to 47.7% and 51.6%, respectively, while the fengycin defective mutant ΔfenC and a PhoP/PhoR two-component regulatory system mutant, ΔphoP, were unable to prevent this disease. In vitro, P. brassicae resting spore cells were lysed when treated with standard fengycin and crude fengycin extracts of the wild type B. subtilis NCD-2, but not of its mutant ΔfenC. Moreov...
Source: Biological Control - June 9, 2019 Category: Biology Source Type: research

Environment and host plant quality interact to determine the pupation success of a biological control agent, Agasicles hygrophila, on a nontarget host, Alternanthera sessilis
In this study, we examined the performance of Agasicles hygrophila Selman and Vogt, a beetle used for biological control of the invasive plant alligator weed, Alternanthera philoxeroides (Mart.) Griseb, on a nontarget native plant, Alternanthera sessilis (L.) R.Br. ex DC. Our laboratory tests with various sized A. sessilis stems showed that larvae could pupate and successfully develop into adults on A. sessilis regardless of the stem size, but with larger stems improving the pupation rate. The insect was also found to pupate, and the pupae survive, when there was no stem available under laboratory conditions. When rearing ...
Source: Biological Control - June 8, 2019 Category: Biology Source Type: research

A successful biocontrol agent in the USA, Diorhabda carinulata (Coleoptera: Chrysomelidae) on Tamarix spp. (Tamaricaceae), rejected in South Africa due to insufficient host specificity
Publication date: Available online 8 June 2019Source: Biological ControlAuthor(s): Danica Marlin, Etienne R. Smit, Marcus J. ByrneAbstractSeveral countries globally, including South Africa, have been invaded by at least one of five species of Tamarix. South Africa therefore considered using one or more species of leaf-feeding beetles in the genus Diorhabda (Coleoptera: Chrysomelidae), including Diorhabda carinulata, against invasive T. ramosissima and T. chinensis, since the beetles are highly damaging in the USA. The situation in South Africa is possibly more complicated than that in the USA because there is an indig...
Source: Biological Control - June 8, 2019 Category: Biology Source Type: research

Editorial Board
Publication date: August 2019Source: Biological Control, Volume 135Author(s): (Source: Biological Control)
Source: Biological Control - June 2, 2019 Category: Biology Source Type: research

Comparison of thermal performances of two Asian larval parasitoids of Drosophila suzukii
Publication date: Available online 30 May 2019Source: Biological ControlAuthor(s): Evelyne Hougardy, Brian N. Hogg, Xingeng Wang, Kent M. DaaneAbstractGanaspis brasiliensis Ihering and Leptopilina japonica Novković & Kimura (Hymenoptera: Figitidae) are candidates for biological control of the spotted wing drosophila, Drosophila suzukii Matsumura (Diptera: Drosophilae), an invasive pest originally from East Asia. Developmental time and offspring survival from egg to adult, and fecundity (measured as adult offspring production/female wasp) of a Chinese and a South Korean population of both species were assessed at diffe...
Source: Biological Control - May 31, 2019 Category: Biology Source Type: research

Three prospective agents instead of one? Cryptic diversity of the biological control agent Psylliodes chalcomera
Publication date: Available online 30 May 2019Source: Biological ControlAuthor(s): Alessio De Biase, L. Smith, M. Brunetti, S. Belvedere, S. Primerano, G. Antonini, A. La Marca, P. Audisio, M. Biondi, M. CristofaroAbstractThe flea beetle, Psylliodes chalcomera, was previously permitted as a biological control agent of Carduus nutans (musk thistle) in the USA. However, during subsequent exploration for prospective biological control agents of Centaurea solstitialis (yellow starthistle), we observed individuals attacking this plant in southern Russia. We also observed this insect on Onopordum spp. (Scotch thistle), which rai...
Source: Biological Control - May 31, 2019 Category: Biology Source Type: research

Effect of volatiles produced by Trichoderma spp. on expression of glutathione transferase genes in Sclerotinia sclerotiorum
This study was carried out to determine the effect of volatile compounds produced from different Trichoderma spp. against different biological parameters of S. sclerotiorum. The results showed that volatiles of all tested Trichoderma spp. including T. reesei, T. ceramicum, T. rossicum, T. longibrachiatum, T. atroviride, T. viridescens, T. hamatum, T. harzianum, T. virens, T. koningii and T. koningiopsis were able to markedly reduce mycelial growth, sclerogenesis as well as mycelial and carpogenic germination of the sclerotia. The exposure of pathogen mycelium to volatiles of T. ceramicum, T. atroviride, T. viridescens, T. ...
Source: Biological Control - May 30, 2019 Category: Biology Source Type: research

The parasitoid complex of the ambermarked birch leafminer, Profenusa thomsoni Konow (Hymenoptera: Tenthredinidae), in Anchorage, Alaska and each species’ role in biological control
Publication date: Available online 29 May 2019Source: Biological ControlAuthor(s): Anna L. Soper, Roy Van DriescheAbstractThree parasitoids are known to attack the invasive leafminer Profenusa thomsoni Konow (Hymenoptera: Tenthredinidae) in Alaska: Lathrolestes thomsoni Reshchikov, Lathrolestes soperi Reshchikov (both Hymenoptera: Ichneumonidae) and Aptesis segnis (Provancher) (Hymenoptera: Ichneumonidae). The two Lathrolestes species have similar biology and attack early instar larvae as endoparasitoids within hosts in leaf mines. Of these, L. thomsoni was introduced from 2004 to 2009 as a biological control agent, while ...
Source: Biological Control - May 30, 2019 Category: Biology Source Type: research

Phosphate solubilizers as antagonists for bacterial leaf blight with improved rice growth in phosphorus deficit soil
Publication date: Available online 24 May 2019Source: Biological ControlAuthor(s): Maria Rasul, Sumera Yasmin, Muhammad Zubair, Naima Mahreen, Sumaira Yousaf, M. Arif, Zahid Iqbal Sajid, Muhammad Sajjad MirzaAbstractMultifaceted phosphate solubilizing bacteria (PSB) promote growth of plants by acting both as biofertilizer and biopesticide. The present study aimed to use native beneficial rhizobacteria to suppress rice Bacterial Leaf Blight (BLB) pathogen as well as to combat the plant in P deficiency without reduction in crop yield. In present investigation, of 50 PSB isolated from rice rhizosphere, three bacterial strains...
Source: Biological Control - May 25, 2019 Category: Biology Source Type: research

Editorial Board
Publication date: July 2019Source: Biological Control, Volume 134Author(s): (Source: Biological Control)
Source: Biological Control - May 25, 2019 Category: Biology Source Type: research

Biological control of Phytophthora collar rot of pear using regional Trichoderma strains with multiple mechanisms
Publication date: Available online 23 May 2019Source: Biological ControlAuthor(s): Aixa Daihana Sanchez, Maria Julia Ousset, María Cristina SosaAbstractThe Alto Valle of Rio Negro is the main exporter and producer region of pear in Argentina, ʻBartlett’ being the most important cultivar. Phytophthora cactorum and Phytophthora spp. cause significant economic losses in commercial pear production from tree death and weakening and fruit rot. The harmful effect of fungicides and market regulations have created the need to search for promising natural biocontrol agents in integrated crop management programmes. As r...
Source: Biological Control - May 24, 2019 Category: Biology Source Type: research

Responses of the seed-feeding beetle Acanthoscelides macrophthalmus and its recruited parasitoids to resource availability – implications for the biological control of Leucaena leucocephala in South Africa
Publication date: Available online 18 May 2019Source: Biological ControlAuthor(s): Morag Sharratt, Terence OlckersAbstractIntroduced from Central America for agroforestry, Leucaena leucocephala (Lam.) De Wit (Fabaceae) has become invasive in several tropical and subtropical regions worldwide. The seed beetle Acanthoscelides macrophthalmus (Schaeffer) (Coleoptera: Chrysomelidae: Bruchinae) was released in South Africa in 1999 to curb the plant’s high seed production. Monthly sampling was conducted during 2011/2012 at four sites in KwaZulu-Natal Province to determine the reproductive phenology of L. leucocephala popula...
Source: Biological Control - May 18, 2019 Category: Biology Source Type: research

Physiological performance of ballan wrasse (Labrus bergylta) at different temperatures and its implication for cleaner fish usage in salmon aquaculture
Publication date: Available online 15 May 2019Source: Biological ControlAuthor(s): Jeffrey William Yuen, Tim Dempster, Frode Oppedal, Malthe HvasAbstractBallan wrasse (Labrus bergylta) are used extensively as cleaner fish to control salmon lice (Lepeophtheirus salmonis) infestations in the Atlantic salmon (Salmon salar) aquaculture industry. Fish are either cultured or caught in the wild before being transferred to salmon sea cages. Ballan wrasse are a poorly studied species, and fundamental knowledge of physiological performances and environmental limits are therefore needed for better deployment strategies and to predict...
Source: Biological Control - May 16, 2019 Category: Biology Source Type: research

Biological control of the coffee berry borer: main natural enemies, control success, and landscape influence
In conclusion, understanding successful coffee management to reduce CBB pest pressure requires more studies on conservation biocontrol, and analyzing the relative importance of local and landscape management for fungal infections as well as for invertebrate and vertebrate predators. (Source: Biological Control)
Source: Biological Control - May 16, 2019 Category: Biology Source Type: research

Continuous heat waves change the life history of a host-feeding parasitoid
Publication date: August 2019Source: Biological Control, Volume 135Author(s): Yi-Bo Zhang, Gui-Fen Zhang, Wan-Xue Liu, Fang-Hao WanAbstractThe frequency and duration of heat waves are expected to increase under global warming, so parasitoids could increasingly encounter heat waves at some stage of their life cycle. However, few studies have focused on how host-feeding parasitoids respond to heat waves. We investigated how the frequency of heat waves during different developmental stages (larva, pupa and adult) of a host-feeding parasitoid, Eretmocerus hayati, affects its life history traits and life table parameters. The r...
Source: Biological Control - May 16, 2019 Category: Biology Source Type: research

Reproductive life-history traits of the classical biological control agent Hypena opulenta (Lepidoptera: Erebidae): Using agent biology to support post release monitoring and establishment
Publication date: Available online 11 May 2019Source: Biological ControlAuthor(s): M. Lukas Seehausen, Carla Timm, Ian M. Jones, Robert S. Bourchier, Sandy M. SmithAbstractIt is important to develop efficient and cost-effective methods for monitoring the establishment and fitness of biological control agents. Understanding how simple and obtainable measurements of insects or their body parts relate to reproductive life-history traits could facilitate assessing the fitness of biological control agent populations in the field. Across many insect taxa, female size represents a principal constraint on potential fecundity. Here...
Source: Biological Control - May 13, 2019 Category: Biology Source Type: research

Establishment and increased fitness of the seed-feeding weevil Cissoanthonomus tuberculipennis, a biological control agent for balloon vine Cardiospermum grandiflorum in South Africa
Publication date: Available online 11 May 2019Source: Biological ControlAuthor(s): David O. Simelane, Khethani V. MawelaAbstractThe ability of introduced species to adapt and proliferate in their areas of introduction is attributed to a complexity of factors and processes. Post-release studies were conducted to ascertain establishment, spread and initial impact of the seed-feeding weevil Cissoanthonomus tuberculipennis, a biological control agent released against balloon vine Cardiospermum grandiflorum in South Africa. CLIMEX was used to identify areas where C. tuberculipennis was likely to establish. Comparison were also ...
Source: Biological Control - May 13, 2019 Category: Biology Source Type: research

Direct herbivory by biological control agents, and the consequent disruption of plant-nutrient-feedback cycles, combine to reduce the invasiveness of Melaleuca quinquenervia (Myrtaceae)
Publication date: Available online 11 May 2019Source: Biological ControlAuthor(s): Melissa R. Martin, Philip W. Tipping, Michelle C. Mack, K.R. ReddyAbstractHerein we present the results of a 5-year herbivore exclusion experiment in which the suppression of two successful biological control agents revealed a nutrient feedback cycle that promoted the growth and dominance of the exotic tree Melaleuca quinquenervia. When herbivory was restricted, plants produced greater quantities of aboveground biomass, which transferred a greater volume of litterfall and a larger load of nutrients to the soil surface. The resulting organic ...
Source: Biological Control - May 13, 2019 Category: Biology Source Type: research

Host range testing of Tamarixia dryi (Hymenoptera: Eulophidae) sourced from South Africa for classical biological control of Trioza erytreae (Hemiptera: Psyllidae) in Europe
Publication date: Available online 10 May 2019Source: Biological ControlAuthor(s): Pablo Urbaneja-Bernat, Jesica Pérez-Rodríguez, Kerstin Krüger, José Catalán, Rositta Rizza, Estrella Hernández-Suárez, Alberto Urbaneja, Alejandro TenaAbstractThe African citrus psyllid, Trioza erytreae, vectors citrus greening or huanglongbing (HLB) disease. The psyllid has been reported from mainland Europe, where it is rapidly spreading from the northwest to the southwest of the Iberian Peninsula. In order to reduce its spread and population levels, a classical biological control program with...
Source: Biological Control - May 11, 2019 Category: Biology Source Type: research

A fuzzy-based index to identify suitable areas for host-parasitoid interactions: Case study of the Asian citrus psyllid Diaphorina citri and its natural enemy Tamarixia radiata
Publication date: Available online 10 May 2019Source: Biological ControlAuthor(s): Adriano Gomes Garcia, Alexandre José Ferreira Diniz, José Roberto Postali ParraAbstractWe developed a computational index to identify suitable areas for biological control using the interaction between an insect pest and its natural enemy. The index considers that environmental conditions should be suitable for the development of both insects and that the plants participating in the tritrophic system should be in the appropriate stage of development. In order to represent the uncertainty associated with empirical information an...
Source: Biological Control - May 11, 2019 Category: Biology Source Type: research

The beauties and the bugs: a scenario to design flower strips adapted to aphid management in melon crops
Publication date: Available online 9 May 2019Source: Biological ControlAuthor(s): Alexandra Schoeny, Antoine Lauvernay, Jérôme Lambion, Christophe Mazzia, Yvan CapowiezAbstractFlower strips appear as a promising lever to promote pest control but a careful selection of plant species is needed prior implementation to avoid possible negative side effects. In the case of open field melon crops, the main pitfall would be to generate aphid and aphid-borne virus reservoirs near the crops. Combining biotests in controlled conditions and literature, we assessed 18 candidate plant species, and discarded those posing a p...
Source: Biological Control - May 10, 2019 Category: Biology Source Type: research

Plant feeding by an omnivorous predator affects plant phenology and omnivore performance
Publication date: Available online 9 May 2019Source: Biological ControlAuthor(s): Nina Xiaoning Zhang, Gerben J. Messelink, Sunny Verdonkschot, Arne JanssenAbstractPlant feeding by omnivorous predators can induce plant defences, which decreases the performance of herbivores and influence behaviour of other predators. However, it is not known what are the consequences of this feeding for the plant and how this, in turn, affects the omnivore. We therefore investigated the effects of plant feeding by the omnivorous predator Macrolophus pygmaeus on plant development and reproduction. We also assessed the effects of these plant...
Source: Biological Control - May 10, 2019 Category: Biology Source Type: research

Herbivore-induced plant volatiles enhance field-level parasitism of the mirid bug Apolygus lucorum
Publication date: Available online 9 May 2019Source: Biological ControlAuthor(s): Chunli Xiu, Weijian Dai, Hongsheng Pan, Wei Zhang, Shuping Luo, Kris A.G. Wyckhuys, Yizhong Yang, Yanhui LuAbstractIn China, the braconid wasp Peristenus spretus Chen & van Achterberg (Hymenoptera: Braconidae) is a native endoparasitoid of the mirid bug Apolygus lucorum (Meyer-Dür) (Hemiptera: Miridae). Castor bean (Ricinus communis L.) is a preferred host plant of A. lucorum, and P. spretus adults are attracted to its herbivore-damaged flowering plants. Here, we used headspace collection to sample the volatiles emitted by A. lucorum...
Source: Biological Control - May 10, 2019 Category: Biology Source Type: research

Post-mortem incubation influences occlusion body production in nucleopolyhedrovirus-infected larvae of Spodoptera frugiperda
Publication date: Available online 7 May 2019Source: Biological ControlAuthor(s): Fernando G. Ramírez-Arias, Rodrigo Lasa, Rosa Murillo, Laura Navarro-de-la-Fuente, Gabriel Mercado, Trevor WilliamsAbstractThe efficient production of nucleopolyhedrovirus occlusion bodies (OBs) can limit the commercialization of virus-based insecticides. The production of OBs in SfMNPV-infected Spodoptera frugiperda fourth instars was compared among groups of larvae that were frozen (-20 °C) immediately following death, or subjected to a 9-day period of post-mortem incubation at 5 °C or 15 °C. Incubation at 15 °C resul...
Source: Biological Control - May 7, 2019 Category: Biology Source Type: research

Variability in weed biological control: effects of foliar nitrogen on larval development and dispersal of the alligatorweed flea beetle, Agasicles hygrophila
Publication date: Available online 3 May 2019Source: Biological ControlAuthor(s): Nathan Harms, James T. CroninAbstractHost quality can have dramatic effects on performance of biological control agents but its importance is understudied. We used a combination of field measurements and laboratory experiments to determine the range of foliar nitrogen (FN) that larvae of the alligatorweed flea beetle are exposed to in the field and its importance to larval development and dispersal. Seasonal variability in FN was assessed at field sites spanning southern to northern Louisiana every 2-3 weeks during the growing season for four...
Source: Biological Control - May 4, 2019 Category: Biology Source Type: research

Biocontrol activity of Rhodotorula mucilaginosa combined with salicylic acid against Penicillium digitatum infection in oranges
Publication date: Available online 2 May 2019Source: Biological ControlAuthor(s): Joseph Ahima, Xiaoyun Zhang, Qiya Yang, Lina Zhao, Apaliya Maurice Tibiru, Hongyin ZhangAbstractThe effectiveness of Rhodotorula mucilaginosa in combination with salicylic acid (SA) was explored for the control of green mold decay of oranges and the mechanisms involved. The results of the study showed that treatments with the diverse concentrations of SA was remarkable in reducing the disease incidence of oranges and that SA at a concentration of 0.2 mM reduced the decay of oranges from 93.06 % to 61.12 %. At an incubation temperature of 20 o...
Source: Biological Control - May 4, 2019 Category: Biology Source Type: research

Give predators a complement: conserving natural enemy biodiversity to improve biocontrol
Publication date: Available online 27 April 2019Source: Biological ControlAuthor(s): William E. SnyderAbstractNatural enemy biodiversity reflects both the number of species attacking pests (species richness) and their relative abundances (species evenness). Recent experimental work suggests that greater enemy biodiversity might lead to stronger pest suppression when natural enemies occupy different, complementary feeding niches. Complementarity can arise from natural enemy species attacking different pest species or stages located in different places or at different times, and/or when enemies use different hunting strategi...
Source: Biological Control - April 27, 2019 Category: Biology Source Type: research

Potential for biocontrol of Pleurotus ostreatus green mould disease by Aureobasidium pullulans De Bary (Arnaud)
Publication date: Available online 25 April 2019Source: Biological ControlAuthor(s): Roberta Roberti, Alessandra Di Francesco, Gloria Innocenti, Marta MariAbstractPleurotus ostreatus, commonly known as “oyster mushroom”, is an edible fungus economically important worldwide. The green mould, caused by Trichoderma pleuroti and T. pleuroticola, is a very important fungal disease, and it is commonly controlled by the use of fungicides. The yeast-like fungus Aureobasidium pullulans is a biocontrol agent naturally found throughout a wide range of habitats. The effect of A. pullulans L1 and L8 strains on P. ostreatus,...
Source: Biological Control - April 26, 2019 Category: Biology Source Type: research

First Laboratory evaluation of Gryon gonikopalense (Hymenoptera: Scelionidae), as potential biological control agent of Bagrada hilaris (Hemiptera: Pentatomidae)
Publication date: Available online 25 April 2019Source: Biological ControlAuthor(s): G. Martel, M. Augé, E. Talamas, M. Roche, L. Smith, R.F.H. SforzaAbstractThe pentatomid bug Bagrada hilaris is a severe invasive alien pest of Brassicaceae crops, which first appeared in California in 2008 and is expanding to several southern U.S. states and South America. To answer the demand of growers for sustainable management methods, a biological control program started in 2015. The egg parasitoid Gryon gonikopalense Sharma was collected in Pakistan, and after morphological identification here described, is being evaluated as ...
Source: Biological Control - April 25, 2019 Category: Biology Source Type: research

Biocontrol of postharvest Alternaria decay in table grapes from Mendoza province
Publication date: July 2019Source: Biological Control, Volume 134Author(s): A.F. Stocco, M.E. Diaz, M.C. Rodríguez Romera, L.A. Mercado, M.L. Rivero, M.L. PonsoneAbstractPostharvest diseases cause considerable loss of fruit during transportation and storage. Synthetic fungicides are primarily used to control them. However, the recent trend is to shift toward safer and more eco-friendly alternatives for the control of postharvest decays. In Argentina, Alternaria genus was cited as a postharvest pathogen on table grapes for the first time during 2010–2012 seasons. The aim of this study was to identify, by morpho...
Source: Biological Control - April 25, 2019 Category: Biology Source Type: research

An emerging problem affecting apple production: Neofusicoccum parvum. Aureobasidium pullulans L1 and L8 strains as an alternative control strategy
Publication date: Available online 22 April 2019Source: Biological ControlAuthor(s): C. Rusin, A. Di Francesco, M. Di Foggia, S. D'Aquino, A. Rombolà, V. Tugnoli, R. Vasconcelos Botelho, E. BaraldiAbstractAureobasidium pullulans strains L1 and L8 were used as an alternative strategy against Neofusicoccum parvum, pathogen of apple wood and fruit. Both strains displayed a great ability to reduce pathogen conidia germination of almost 50% and totally stop its sporification in wood of ‘Gala’ and ‘Fuji’ apple cultivars. In addition, by in vitro tests the antagonistic activity displayed by non-vola...
Source: Biological Control - April 23, 2019 Category: Biology Source Type: research

Continuous heat wave changed the life history in a host feeding parasitoid
Publication date: Available online 19 April 2019Source: Biological ControlAuthor(s): Yi-Bo Zhang, Gui-Fen Zhang, Wan-Xue Liu, Fang-Hao WanAbstractParasitoids are insects that lay eggs inside or on other insects (their host). Host feeding parasitoids does not only lay egg to parasitize the host, but also feed directly on host for nourishment. The frequency and duration of heat waves are expected to increase under global warming, so parasitoids could increasingly encounter heat waves at some stage of their lifecycle. However, few studies paid attention to how a host feeding parasitoid face to heat waves. we investigated how ...
Source: Biological Control - April 20, 2019 Category: Biology Source Type: research

Trapping success and flight behavior of two parasitoid species of the woodwasp Sirex noctilio
Publication date: Available online 19 April 2019Source: Biological ControlAuthor(s): Andrés S. Martínez, Deborah Fischbein, José M. Villacide, Juan C. CorleyAbstractClassical biological control relies on the deliberate introduction of natural enemies to reduce pest populations below damage thresholds. Knowledge on key aspects of the behavior of antagonists and their population densities through time can be important to increase the efficiency of control programs. The woodwasp Sirex noctilio is a global threat to pine forests and biological control can be based, among other agents, on two parasitoids, I...
Source: Biological Control - April 20, 2019 Category: Biology Source Type: research

Managing fertility with animal waste to promote arthropod pest suppression
Publication date: Available online 19 April 2019Source: Biological ControlAuthor(s): Elizabeth Rowen, John Tooker, Carmen BlubaughAbstractFertility management is key to maintaining soil quality in crop systems and can have important implications for plant growth and insect pest populations. Organic fertility amendments, particularly animal manures, are hypothesized to simultaneously promote plant vigor, herbivore resistance, and top-down pest suppression. Animal-waste fertilizers influence pest control in at least two ways: first, they can affect prey suppression from the bottom up by changing macro- and micronutrient conc...
Source: Biological Control - April 20, 2019 Category: Biology Source Type: research

Taxonomy of registered Bacillus spp. strains used as plant pathogen antagonists
This study should help establish a link between the research literature and product labels, which should lead to improved knowledge and regulatory actions. (Source: Biological Control)
Source: Biological Control - April 17, 2019 Category: Biology Source Type: research

Evaluating host location in three native Sclerodermus species and their ability to cause mortality in the wood borer Aromia bungii (Coleoptera: Cerambycidae) in laboratory
In this study we evaluated the olfactory responses and parasitism rates of three Sclerodermus species against A. bungii when reared on the substitute host, Tenebrio molitor (Coleoptera: Tenebrionidae). In Y-tube olfactometer studies, the odor of frass from the larvae of A. bungii was highly attractive to S. guani adults, but not to S. sichuanensis or S. pupariae adults. When reared on A. bungii larvae (rather than T. molitor) for one generation, S. sichuanensis adults were also attracted to the odor of frass from A. bungii larvae. This indicates that learning plays an important and positive role in successful host location...
Source: Biological Control - April 16, 2019 Category: Biology Source Type: research