Seed dressing with triflumezopyrim controls brown planthopper populations by inhibiting feeding behavior, fecundity and enhancing rice plant resistance
| Autor: | Yongkai Zhou, Guo Zhang, Julong Yu, Chen Yu, Lin-Quan Ge, Qing Wu, Zhaolin Shu |
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| Rok vydání: | 2021 |
| Předmět: |
0106 biological sciences
Honeydew Pyridines Population Pyrimidinones Biology 01 natural sciences Hemiptera Vitellogenin chemistry.chemical_compound Electrical penetration graph Animals education education.field_of_study Callose food and beverages Oryza General Medicine Feeding Behavior biology.organism_classification Fecundity Bandages 010602 entomology Horticulture Fertility chemistry Insect Science Seeds biology.protein Female Phloem Brown planthopper Agronomy and Crop Science 010606 plant biology & botany |
| Zdroj: | Pest management scienceREFERENCES. 77(6) |
| ISSN: | 1526-4998 |
| Popis: | Background Triflumezopyrim (TFM), a novel mesoionic insecticide, has high efficiency at a low dosage, and is mainly used to control hopper species. A previous study demonstrated that seed dressing with TFM effectively controlled rice planthopper populations in mechanically transplanted rice fields; however, mode of action for control was unclear. Results The study shows that seed dressing with TFM resulted in elevated levels of oxalic acid, flavonoids, phenolic substances, callose and other compounds associated with Nilaparvata lugens resistance in rice plants, and low TFM residue content in rice plant stem and grain. Host choice behavioral experiments showed that N. lugens females prefer feeding on untreated rice plants. Electrical penetration graph (EPG) data showed that seed dressing with TFM at medium and high doses significantly prolonged the non-probing period and inhibited phloem ingestion in N. lugens females. These changes led to a significant decrease in female secretion of honeydew, expression of genes encoding vitellogenin and juvenile hormone acid methyltransferase, body weight and longevity, and significantly influenced several physiological parameters resulting in impaired oocyte growth, fecundity and population. Field survey data showed that seed dressing with TFM was efficacious and relatively durable in protecting rice plants from infestation by planthoppers. Conclusion This study revealed that seed dressing with TFM enhances rice plant resistance to N. lugens by limiting phloem ingestion and increasing the N. lugens non-probing period; this leads to reduced fecundity of females and lowers N. lugens numbers in the field. © 2021 Society of Chemical Industry. |
| Databáze: | OpenAIRE |
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