期刊
ENVIRONMENTAL ENTOMOLOGY
卷 51, 期 4, 页码 763-771出版社
OXFORD UNIV PRESS INC
DOI: 10.1093/ee/nvac042
关键词
acute toxic response; consequential risk; chronic-exposure; ecdysone agonist
类别
资金
- USDA National Institute of Food and Agriculture AFRI [2018-07406]
- USDA-NIFA [1021546]
- Louisiana Soybean and Grain Research and Promotion Board
Research shows that nanoparticles can be an effective tool for managing agricultural pests, but their unintended effects on insects should be evaluated before using them in agroecosystems. In this study, chronic parental and generational exposure to positively charged zein nanoparticles and methoxyfenozide-loaded zein nanoparticles were evaluated on Chrysodeixis includens. The study found that the nanoparticles had different effects on the insect's population dynamics, with the methoxyfenozide-loaded nanoparticles being more deleterious than the positively charged nanoparticles.
Research indicates that nanoparticles can be an effective agricultural pest management tool, though unintended effects on the insect must be evaluated before their use in agroecosystems. Chrysodeixis includens (Walker) was used as a model to evaluate chronic parental and generational exposure to empty, positively charged zein nanoparticles ((+)ZNP) and methoxyfenozide-loaded zein nanoparticles (+)ZNP(MFZ) at low-lethal concentrations. To determine concentration limits, an acute toxic response test on meridic diet evaluated (+)ZNP(MFZ) and technical grade methoxyfenozide using two diet assay techniques. No differences in acute toxicity were observed between the two treatments within their respective bioassays. With these results, population dynamics following chronic exposure to low-lethal concentrations were evaluated. Parental lifetables evaluated cohorts of C. includens reared on diet treated with LC5 equivalents of (+)ZNP, (+)ZNP(MFZ), or technical grade methoxyfenozide. Compared to technical grade methoxyfenozide, (+)ZNP(MFZ) lowered both the net reproductive rate and intrinsic rate of increase, and was more deleterious to C. includens throughout its lifespan. This was contrasted to (+)ZNP, which showed no differences in population dynamics when compared with the control. To evaluate chronic exposure to (+)ZNP, generational lifetables reared cohorts of C. includens on LC5 equivalent values of (+)ZNP and then took the resulting offspring to be reared on either (+)ZNP or untreated diet. No differences in lifetable statistics were observed between the two treatments, suggesting that (+)ZNP at low ppm do not induce toxic generational effects. This study provides evidence into the effects of nanodelivered methoxyfenozide and the generational impact of (+)ZNP.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据