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Evidence of active oviposition avoidance to systemically applied imidacloprid in the Colorado potato beetle

INSECT SCIENCE 2024年第5期31卷 1543-1554页

作者： Edison, Alitha Michelbach, Anja Sowade, Dominique Kertzel, Hanna Schmidt, Luise Schaefer, Martin Lysander, Maximillian Nauen, Ralf Duchen, Pablo Xu, Shuqing Univ Munster Inst Evolut & Biodivers Hufferstr 1 D-48149 Munster Germany Johannes Gutenberg Univ Mainz Inst Organism & Mol Evolut iomE Hanns Dieter Husch Weg 15 D-55128 Mainz Germany Dept Cell & Tissue Dynam Munster Germany Johannes Gutenberg Univ Mainz Inst Organism & Mol Evolut iomE Mainz Germany Bayer AG Res & Dev Dept Crop Sci Div Monheim Germany

Agricultural pests can develop behavioral resistance to insecticides by choosing to feed or oviposit on insecticide-free hosts. As young larvae have relatively low mobility, oviposition preferences from female adults may play a critical role in shaping the evolutionary trajectory of pest populations. While oviposition avoidance of insecticide-treated hosts was found in different agriculture pests, it remains unclear whether female adults actively choose to occupy insecticide-free hosts. To address this question, we investigated feeding and oviposition preferences between imidacloprid-treated and imidacloprid-free plants in the Colorado potato beetle, Leptinotarsa decemlineata Say, a major potato pest. We performed behavioral choice assays on two strains that differed in both fecundity and insecticide resistance. We found that one strain preferred to feed on the insecticide-free plants and that this preference is not innate. Meanwhile, the other strain chose plants for feeding and oviposition randomly. Further analyses of the moving patterns of the beetles suggested that the oviposition preference in the first strain is likely due to active learning. A strain of L. decemlineata avoided imidacloprid-treated plants for feeding and oviposition in choice assays while another strain chose plants randomly. First feeding is random in both strains. The oviposition avoidance behavior might be an active response due to learning from feeding on both choices of plants. image

关键词： Colorado potato beetle host preferences imidacloprid insecticide resistance oviposition pesticide avoidance LEPTINOTARSA-DECEMLINEATA COLEOPTERA GREEN LEAF VOLATILES INSECTICIDE RESISTANCE FEEDING preferences LARVAE CHRYSOMELIDAE BEHAVIOR NITROMETHYLENE ORIENTATION DISPERSAL

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New genes acquired from plants by horizontal gene transfer may have contributed to adaptive divergence in Valsa spp.

New genes acquired from plants by horizontal gene transfer m...

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中国植物病理学会第十一届全国会员代表大会暨2018年学术年会

作者： Xie Shichang Yin Zhiyuan Huang Lili State Key Laboratory of Crop Stress Biology for Arid Areas College of Plant ProtectionNorthwest A&F University

Fungi could gain genes from different origins by horizontal gene transfer(HGT),which potentially provide the capacity to adapt to new environments and *** *** plant fungal pathogens mainly infect Rosids,and interesting is that they have overlapping hosts but are isolated from only one practically in the *** genomics analysis of five Valsa *** these pathogens exhibited a very high degree of similarity with less than eight percent of all genes were unique between *** it raised us a question if HGT between the pathogens and hosts played a role in their distinct host preferences as well as extreme *** detecting HGT events,we combined methods of orthologous annotation,BLAST against GeneBank nr database and taxonomy *** identified 19 genes in Valsa spp.,of which all top 100 hits were from plants,were obtained through *** found one zinc finger(ZnF C2H2) protein coding gene located in a secondary metabolism cluster was transferred from plant to the common ancestor of Valsa and then lost in two species during following *** genes were obtained after speciation and associated with electron *** specially unique but functionally similar HGT events occurred during or after Valsa *** could represent feasible clues for plant-pathogens adaption and interaction.

关键词： Horizontal gene transfer Valsa spp. host preferences Species divergence

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