Article
Fisheries
Gui-Jie Wang, Jia-Lin Wang, Xu-Sheng Liu
Summary: C-type lectins (CTLs) are important pattern recognition receptors (PRRs) in the innate immunity of insects. In this study, the expression profiles of 36 CTLs in Helicoverpa armigera after infection by Metarhizium rileyi were analyzed. It was found that many HaCTLs were up-regulated after the infection. Further experiments showed that recombinant HaCTLs were able to bind to conidia and hyphal bodies of M. rileyi, with weaker affinity of rHaCTL11 and rHaCTL27 for hyphal bodies. Sugar specificity assays revealed specific inhibitory sugars for HaCTLs' binding to M. rileyi. Survival assays demonstrated the protective role of rHaCTL11 against fungal infection.
DEVELOPMENTAL AND COMPARATIVE IMMUNOLOGY
(2023)
Article
Entomology
Sheng-Kai Cao, Xing-Xing Du, Gong Chen, Ai-Ping Zeng, Huan Yu
Summary: This study aimed to identify novel bacterial strains effective in controlling Spodoptera exigua Hubner, Helicoverpa armigera Hubner, and Spodoptera litura Fabricius. Fifteen culturable bacterial strains were isolated from 60 dead larvae collected in the field. The results showed that 12 strains belonged to Bacillus thuringiensis kurstaki with high toxicity, and one strain was Lysinibacillus sp. with good toxicity potential. These strains are expected to play an important role in the development of biological pesticides.
JOURNAL OF ECONOMIC ENTOMOLOGY
(2023)
Article
Entomology
Leyao Li, Shan Wang, Kaiyuan Huang, Yuting Zhang, Yalu Li, Min Zhang, Jinyong Huang, Zhongyuan Deng, Xinzhi Ni, Xianchun Li
Summary: This study identified and characterized miRNAs in the ovaries and testes of the cotton bollworm, providing insights into the potential roles of these miRNAs in the reproductive processes of this destructive crop pest. The differential expression of gonad-biased miRNAs suggests their involvement in reproduction-related pathways, making them potential targets for reproductive-destruction-based control strategies against Helicoverpa armigera and other lepidopteran pests.
Article
Entomology
Wilma J. Nel, Bernard Slippers, Michael J. Wingfield, Neriman Yilmaz, Brett P. Hurley
Summary: The accidental introduction of Euwallacea fornicatus and its fungal symbiont, Fusarium euwallaceae, into multiple countries has had a devastating impact on economically and ornamentally important tree species. Currently, there is no effective control measure in place to manage this beetle pest. Preliminary tests of commercialized entomopathogenic products showed limited efficacy against the beetle.
Article
Entomology
Lisa J. Bird, Paul W. Walker, Linda J. Drynan
Summary: This study monitored the annual indoxacarb resistance in Helicoverpa armigera populations collected from various crops in Australia. The resistance frequency was lowest in the 2013-2014 and 2015-2016 seasons, then increased significantly to a ten-year high in 2018-2019 but declined during a severe drought in 2019-2020. Two indoxacarb resistant strains were identified, with one strain showing reduced sensitivity to chlorantraniliprole.
JOURNAL OF ECONOMIC ENTOMOLOGY
(2023)
Article
Entomology
Wenbo Yu, Graham P. Head, Fangneng Huang
Summary: This study investigates the inheritance of resistance to Cry1A.105 toxin in the corn earworm and finds that it is controlled by a single, autosomal, nonrecessive gene. The nonrecessive nature of the resistance may be an important factor contributing to widespread resistance in maize hybrids containing Cry1A.105 in the United States.
Article
Multidisciplinary Sciences
Patil Jyothi, Prabhuraj Aralimarad, Vijaya Wali, Shivansh Dave, M. Bheemanna, J. Ashoka, Patil Shivayogiyappa, Ka S. Lim, Jason W. Chapman, Sanjay P. Sane
Summary: This study used laboratory-based flight mill assay to demonstrate facultative migration in Helicoverpa armigera populations in South India. Male moths showed better performance in flight activity compared to female moths, with wing morphometric parameters playing a key role in influencing long-distance flight behavior.
Article
Agronomy
Kalpana Bisht, Sunil Kumar Yadav, Sagarika Bhowmik, N. N. Singh
Summary: Tomato production in the tropics is often harmed by the tomato fruit borer, Helicoverpa armigera. Developing resistant tomato cultivars has been a challenge due to the lack of good resistance sources for breeding in India. In this study, twenty-two tomato genotypes were evaluated for their resistance to H. armigera, and six of them were identified as resistant. Resistance was associated with morphological and biochemical factors such as higher trichome density, thicker fruit pericarp, higher phenol content, and lower soluble sugar and protein contents. These resistant genotypes could be used in breeding programs to enhance resistance to H. armigera in commercially cultivated tomato varieties.
Article
Entomology
Alejandro I. Del Pozo-Valdivia, Dominic D. Reisig, Lewis Braswell, Jeremy K. Greene, Phillip Roberts, Sally Taylor
Summary: This study investigated the impact of different Bt cotton varieties on Helicoverpa zea populations, finding varying responses and suggesting that current economic thresholds for this pest may be too high. Further research on resistance evolution could inform future threshold development.
JOURNAL OF ECONOMIC ENTOMOLOGY
(2021)
Article
Entomology
Dionei Schmidt Muraro, Thaini M. Goncalves, Douglas Amado, Marcelo F. Lima, Holly J. R. Popham, Paula G. Marcon, Celso Omoto
Summary: This study aimed to investigate the susceptibility of Brazilian populations of Helicoverpa armigera to Helicoverpa armigera nucleopolyhedrovirus (HearNPV) and cross-resistance between HearNPV and insecticides. The results showed that the Brazilian populations of Helicoverpa armigera were susceptible to HearNPV, with low interpopulation variation. No cross-resistance was detected between HearNPV and flubendiamide or indoxacarb. These findings suggest that HearNPV can be an effective tool in integrated pest management and insect resistance management programs.
Article
Entomology
Joseph L. Black, Gus M. Lorenz, Aaron J. Cato, Nick R. Bateman, Nicholas J. Seiter
Summary: This study examined the effectiveness of Helicoverpa armigera nucleopolyhedrovirus (HearNPV) in controlling different larval instars of the soybean pest Helicoverpa zea, as well as the potential for cross-generational infection. The results showed that HearNPV was effective in controlling 1st-3rd instar larvae, but not 4th or 5th instar larvae. Additionally, the second generation of larvae infected by HearNPV died faster than the first generation, indicating the potential for cross-generational infection. These findings suggest that HearNPV could be a useful tool in managing H. zea.
Article
Biotechnology & Applied Microbiology
Igor Henrique Sena da Silva, Isabel Gomez, Sabino Pacheco, Jorge Sanchez, Jie Zhang, Tereza Cristina Luque Castellane, Janete Aparecida Desiderio, Mario Soberon, Alejandra Bravo, Ricardo Antonio Polanczyk
Summary: This study investigates the potential role of HaPHB as a Cry1 toxin receptor and identifies beta-16 from domain III of Cry1Ab as a binding region involved in the interaction with HaPHB-2 and in toxicity. The findings provide novel insights into potential target sites for improving Cry1 toxicity against H. armigera.
APPLIED AND ENVIRONMENTAL MICROBIOLOGY
(2021)
Article
Agronomy
Qinqin Wang, Changhui Rui, Li Wang, Shahzad Ali Nahiyoon, Weiling Huang, Junshu Zhu, Xuejiao Ji, Qingjie Yang, Huizhu Yuan, Li Cui
Summary: The study evaluated the sensitivity of five field populations of cotton bollworm to several insecticides and investigated the biochemical and molecular mechanisms of field-evolved resistance in H. armigera. The results showed moderate resistance in these populations to certain insecticides, with specific correlations between resistance ratio and enzyme activity observed. Additionally, certain genes were found to be overexpressed in the resistant populations, indicating a potential link to resistance development.
PEST MANAGEMENT SCIENCE
(2021)
Article
Entomology
Tamires Doroteo de Souza, Fabricio Oliveira Fernandes, Ariadne Costa Sanches, Joacir do Nascimento, Antonio Alves Pinto, Ricardo Antonio Polanczyk
Summary: This study aimed to investigate the persistence of Beauveria bassiana and Metarhizium anisopliae on soybean leaves and evaluate their effects on the mortality and sublethal effects of Helicoverpa armigera. The results showed that B. bassiana had better persistence than M. anisopliae, with a duration of 8 hours compared to 3-5 hours. The mortality of H. armigera decreased with an increase in the time since application, with B. bassiana causing higher mortality rates compared to M. anisopliae.
EGYPTIAN JOURNAL OF BIOLOGICAL PEST CONTROL
(2022)
Article
Agronomy
Dawson D. Kerns, Fei Yang, David L. Kerns, Scott D. Stewart
Summary: The study aimed to determine if plant tissue overlays could detect resistance by using Bt proteins and Bt cotton plant tissue in diet-overlay bioassays. Results showed that overlays using lyophilized tissue from white flowers were most ideal, while tissue from non-Bt bolls and leaves affected larval health and behavior, affecting assay results.
PEST MANAGEMENT SCIENCE
(2022)
Article
Biochemistry & Molecular Biology
Nayana Hazarika, Sumita Acharjee, Rashmi R. Boruah, Kiran Babar, Srinivas Parimi, Bharat Char, Joel Armstrong, Andy Moore, Thomas J. V. Higgins, Bidyut Kumar Sarmah
Summary: This study demonstrates that transgenic chickpeas expressing the cry1Ac gene exhibit high resistance to the major pest Helicoverpa armigera. Some transgenic lines show significantly elevated levels of trCry1Ac protein expression, leading to enhanced insect resistance in whole plant bioassays.
JOURNAL OF PLANT BIOCHEMISTRY AND BIOTECHNOLOGY
(2021)
Article
Entomology
Young-Joong Kim, Stefanie Kloos, Jorg Romeis, Michael Meissle
Summary: The study found that genetically modified cotton has different impacts on non-target herbivores like spider mites and generalist predators like pirate bugs. Pirate bugs feeding on spider mites from Bt cotton showed reduced survival, increased developmental time, and decreased fecundity. This suggests that the pirate bugs are directly affected by the Bt protein in the genetically engineered cotton.
JOURNAL OF PEST SCIENCE
(2021)
Article
Agronomy
Sarah Wolf, Elias Barmettler, Michael Eisenring, Jorg Romeis, Jana Collatz
Summary: In the experiments, all three pupal parasitoid species showed a preference for D. suzukii as a host. In field cages, the majority of parasitoid offspring emerged from D. suzukii hosts. Both P. vindemmiae and T. drosophilae have the potential to parasitize D. suzukii in the field.
PEST MANAGEMENT SCIENCE
(2021)
Editorial Material
Biotechnology & Applied Microbiology
Yunhe Li, Zhenying Wang, Jorg Romeis
Summary: The highly destructive fall armyworm was first detected in China in late 2018, posing a major economic threat to corn production. This article reviews control strategies and discusses the prospects of managing this pest with Bacillus thuringiensis (Bt) corn in China.
TRENDS IN BIOTECHNOLOGY
(2021)
Article
Biochemistry & Molecular Biology
Abigail Ngugi-Dawit, Isaac Njaci, Thomas J. Higgins, Brett Williams, Sita R. Ghimire, Sagadevan G. Mundree, Linh Thi My Hoang
Summary: This study conducted proteomic analysis to compare the protein profiles of a pigeonpea tolerant accession and a susceptible variety to Helicoverpa armigera. The tolerant accession showed enhanced defense responses, including changes in secondary metabolite precursors, antioxidants, and the phenylpropanoid pathway. The findings suggest that IBS 3471 is a promising candidate for improving the genetic base of cultivated pigeonpea with traits for host plant resistance.
INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES
(2021)
Article
Agronomy
Lindsay W. Bell, Andrew T. James, Mary Ann Augustin, Artur Rombenso, David Blyth, Cedric Simon, Thomas J. V. Higgins, Jose M. Barrero
Summary: Pulses play a vital role in rotation cropping systems in Australia, with mungbean being the predominant summer crop option, though its yields are variable and drought-prone. Cowpea is proposed as a potential alternative crop for dryland summer cropping, offering competitive and profitable advantages with better drought tolerance and potential value in emerging markets for plant-based protein and aquaculture.
Article
Entomology
Jeremy Gonthier, Yi-Bo Zhang, Gui-Fen Zhang, Joerg Romeis, Jana Collatz
Summary: This study investigates the learning capacity of Trichogramma spp. and its impact on their response to tomato odor and parasitism rate against Tuta absoluta. The results show that associative learning with tomato odor can increase the searching time and parasitism rate of some Trichogramma species, suggesting a potential strategy to improve biological control efficacy against T. absoluta.
JOURNAL OF PEST SCIENCE
(2023)
Review
Environmental Sciences
Michael Meissle, Steven E. Naranjo, Joerg Romeis
Summary: The study conducted a systematic review and meta-analyses on the environmental effects of Bt maize on non-target organisms. The results showed that the impact of Bt maize on the community of non-target invertebrates inhabiting maize fields was minimal and mostly neutral. Additionally, comparisons with broad-spectrum pyrethroid insecticide treatments revealed no significant differences in effects.
ENVIRONMENTAL EVIDENCE
(2022)
Article
Biology
Michael Meissle, Steven E. Naranjo, Jorg Romeis
Summary: This study collected and analyzed a large amount of field data on non-target invertebrates in genetically modified maize compared to non-genetically modified maize, aiming to assess the potential non-target effects of insecticidal proteins produced by Bacillus thuringiensis. The systematic review utilized meta-analysis techniques to identify general effects with increased statistical power compared to individual studies.
BMC RESEARCH NOTES
(2022)
Article
Entomology
Anja Boss, Jorg Romeis, Michael Meissle
Summary: This study suggests that genetically engineered cotton with mCry51Aa2 protein poses limited risk to Orius majusculus, a predatory bug, due to its low sensitivity to the Bt protein and its diverse natural prey.
Article
Agronomy
Jeremy Gonthier, Judit Arno, Jorg Romeis, Jana Collatz
Summary: Combining insect viruses with parasitoids for pest control is an effective strategy with minimal negative impact on parasitoid offspring.
PEST MANAGEMENT SCIENCE
(2023)
Article
Agronomy
Michael Meissle, Mario Waldburger, Philippe Jeanneret, Giovanni A. L. Broggini, Andrea Patocchi, Jorg Romeis
Summary: The complete netting of orchards is an effective strategy to protect fruit trees from pest and pathogen damage by reducing insect movement. However, when genetically engineered trees are involved, the reduced movement of pollinators may also result in decreased outcrossing to other non-engineered trees. A field study demonstrated that while large bees were excluded by the nets, small bees could still cross. Occasional cross-pollination events through the netting were also observed in a companion study.
Article
Entomology
Leticia Duarte Martinez, Jorg Romeis, Jana Collatz
Summary: Extreme climatic events, including heat waves, are expected to have negative effects on existing biological control strategies. This study investigated the effects of high-temperature peaks on two commonly used mirid predators, and found that the predators' behavior and prey consumption were affected by the high temperatures. These findings suggest that simultaneous use of these predators may support sustained pest control under high-temperature conditions.
JOURNAL OF APPLIED ENTOMOLOGY
(2023)
Article
Entomology
Michael Meissle, Giselher Grabenweger, Jorg Romeis
Summary: This study investigates the effects of entomopathogenic fungi on noctuid pest caterpillars under constant and fluctuating temperature regimes. The results show that the virulence of the fungi remains similar under fluctuating temperatures compared to constant temperatures. The study suggests that conducting virulence studies under constant temperatures using plant material or artificial diet may be a fair model for environments with fluctuating temperatures.
JOURNAL OF PEST SCIENCE
(2023)
Article
Biodiversity Conservation
Yuanyuan Wang, Qingsong Liu, Xinyuan Song, Xiaowei Yang, Lanzhi Han, Joerg Romeis, Yunhe Li
Summary: This study evaluates the potential unintended effects of pollen from genetically engineered maize and conventional maize on ladybird beetles. The results suggest that the unintended changes caused by genetic engineering may not have biologically relevant effects on ladybird beetles.
PLANTS PEOPLE PLANET
(2022)