期刊
ECOTOXICOLOGY
卷 30, 期 10, 页码 2071-2082出版社
SPRINGER
DOI: 10.1007/s10646-021-02476-5
关键词
Velvet-bean caterpillar; Microbial control; Life table; Biological development; Hormesis; Hormoligosis
资金
- Coordination for the Improvement of Higher Education Personnel (CAPES)
- Paulista State University Julio de Mesquita Filho
- Coordination for the Improvement of Higher Education Personnel - Brazil (CAPES) [001]
The study investigated the life table parameters of Anticarsia gemmatalis exposed to different concentrations of Bt-based bioinsecticide. Results indicated that higher sub-lethal concentrations had the most impact on larval and adult stages, while incubation period, pupal stage, and pre-pupal stage were unaffected. Additionally, changes in sex ratio were observed at certain concentrations.
Bioinsecticides based on Bacillus thuringiensis (Bt) Berliner, 1915 are widely used to control lepidopteran in several crops. However, surviving insects exposed to the sub-lethal concentration of Bt-based bioinsecticides can suffer a multitude of effects on the biological conditioning known as hormesis. Here, we aimed to provide a clearer understanding of the biological conditioning of Anticarsia gemmatalis (Hubner, 1818), exposed to different concentrations of a Bt-based bioinsecticide, by assessing life table parameters over three generations. We defined five sub-lethal concentrations (LC5, LC10, LC15, LC20, and LC25) from the response curve estimate of A. gemmatalis. Deionized water was used as a control. We assessed the parameters of eggs-viability and the duration of the stages, incubation, larval, pre-pupal, pupal, adult, pre-oviposition and total biological cycle. Data were used to construct the fertility life table using the two-sex program. The survival curves showed greater variation in the proportion of individuals at each development stage using the LC25. The sub-lethal concentrations did not influence the incubation-eggs period, pre-pupal and pupal. However, the larval and adult stages using LC25 and LC10 were the most affected. Changes in sex ratio were observed using LC20 and LC5. The toxic effect of Bt-based bioinsecticide interfered mainly in the parameters of fertility, sex ratio, net reproduction rate (R0), and gross reproduction rate (GRR).
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