Dataset Information

Preparation of a Chlorantraniliprole-Thiamethoxam Ultralow-Volume Spray and Application in the Control of Spodoptera frugiperda.

ABSTRACT: Traditional pesticide spraying methods such as knapsack sprayers are inefficient. Ground application equipment is restricted by the terrain and damages the crops. Pesticides cannot be sprayed over a large area in a short time; thus, when there are concentrated outbreaks of pests with strong migration capacity, such as Spodoptera frugiperda, pests could not be controlled in a small area. Therefore, it is difficult to achieve a satisfactory control effect. Plant protection unmanned aerial vehicles (UAVs) have high efficiency and spray pesticides at low altitude and can suitably prevent and control the outbreak of pests. However, pesticide formulations suitable for UAVs are rare. In this study, we developed ultralow-volume (ULV) sprays suitable for plant protection UAVs. We studied their properties and found that the ULV sprays have good wettability and can be fully spread. The minimum contact angle on corn leaves is up to 19°, and the maximum retention is 2.7 times that of the reference product. They also have superior resistance to rain washout and can effectively extend the duration and utilization of pesticides. When sprayed by plant protection UAVs, the decrease rate of the ULV spray at 3 L/ha to S. frugiperda larvae is 81.31% and the control effect is 83.01%, both higher than those of the reference product 40% chlorantraniliprole-thiamethoxam water-dispersible granules (decrease rate 67.39%, control effect 70.35%), sprayed with a knapsack sprayer.

SUBMITTER: Wei K

PROVIDER: S-EPMC7409248 | biostudies-literature | 2020 Aug

REPOSITORIES: biostudies-literature

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Publications

Preparation of a Chlorantraniliprole-Thiamethoxam Ultralow-Volume Spray and Application in the Control of <i>Spodoptera frugiperda</i>.

Wei Kun K Xu Weiming W Liu Qin Q Yang Liyun L Chen Zhuo Z

ACS omega 20200722 30

Traditional pesticide spraying methods such as knapsack sprayers are inefficient. Ground application equipment is restricted by the terrain and damages the crops. Pesticides cannot be sprayed over a large area in a short time; thus, when there are concentrated outbreaks of pests with strong migration capacity, such as <i>Spodoptera frugiperda</i>, pests could not be controlled in a small area. Therefore, it is difficult to achieve a satisfactory control effect. Plant protection unmanned aerial v ...[more]

PMID: 32775933

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Project description:BackgroundCyproflanilide is a novel chemical that is already undergoing insecticide registration in China and has been categorized as a member of group 30 by the IRAC. Since it was first detected in 2019, the fall armyworm (FAW), Spodoptera frugiperda, has become a serious pest in China. Our laboratory and field efficacy trials indicated that cyproflanilide exhibits high larvicidal activity against FAW. However, the effect of cyproflanilide against FAW remains unknown. And it is worth exploring further before the cyproflanilide becomes commercially available.ResultsWe found larvae exposed to cyproflanilide had significantly shorter body length and higher death rates compared to control larvae. Additionally, we found surviving larvae had a significantly longer developmental period compared to control larvae. The potential molecular mechanisms of cyproflanilide against FAW were investigated using comparative transcriptomic analyses on larval samples subjected to three insecticide treatments, including cyproflanilide and two other commonly used insecticides against FAW in China, chlorantraniliprole and avermectin. We found that several subunits of the γ-aminobutyric acid receptor (GABAR), a possible target protein of cyproflanilide, were significantly up-regulated at the transcriptional level during cyproflanilide-induced stress. Additionally, between the control and cyproflanilide-treated samples, we identified 131 differentially expressed genes (DEGs) associated with detoxification metabolism. Of these, we found four P450 genes that were significantly up-regulated under cyproflanilide stress but were not DEGs when exposed to chlorantraniliprole and avermectin, or 23 other pesticides from previous reports. Furthermore, we discovered an interesting gene aggregation region for insect cuticle proteins (CPs) on the 18th chromosome, which is likely related to FAW cross-resistance to cyproflanilide and avermectin.ConclusionsOur results contribute to a greater understanding of the mechanisms by which cyproflanilide affects FAW. Additionally, we identified the similarities and differences in transcriptomic profiling of FAW between the novel insecticide cyproflanilide and two other commonly used insecticides.

Dataset Information

Preparation of a Chlorantraniliprole-Thiamethoxam Ultralow-Volume Spray and Application in the Control of Spodoptera frugiperda.

Publications

Preparation of a Chlorantraniliprole-Thiamethoxam Ultralow-Volume Spray and Application in the Control of <i>Spodoptera frugiperda</i>.

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