Comparative susceptibility of Anticarsia gemmatalis Hubner (Lepidoptera: Erebidae) and Chrysodeixis includens (Walker) (Lepidoptera: Noctuidae) to insecticides

被引:0
|
作者
Buss, Nayara [1 ]
Restelatto, Samanta Souza [1 ]
Contini, Rafael Ermenegildo [1 ]
Bueno, Adeney de Freitas [2 ]
Bernardi, Oderlei [3 ]
Carissimi Boff, Mari Ines [1 ]
Franco, Claudio Roberto [1 ]
机构
[1] Univ Estado Santa Catarina UDESC, Ctr Ciencias Agrovet CAV, Program Posgrad Prod Vegetal, BR-88520000 Lages, SC, Brazil
[2] Empresa Brasileira Pesquisa Agr EMBRAPA Soja, Londrina, Parana, Brazil
[3] Univ Fed Santa Maria UFSM, Ctr Ciencias Rurais CCR, Dept Def Fitossanit, Santa Maria, RS, Brazil
来源
CIENCIA RURAL | 2022年 / 52卷 / 08期
关键词
Glycine max; chemical control; integrated pest management; insect resistance management; RESISTANCE; PESTS;
D O I
10.1590/0103-8478cr20210047
中图分类号
S3 [农学(农艺学)];
学科分类号
0901 ;
摘要
Chrysodeixis includens (Walker) and Anticarsia gemmatalis Hubner are important soybean defoliators. The chemical control of A. gemmatalis has been easier and more effective than that of C. includens. It is hypothesized that C. includens is natural tolerant to insecticides. This study quantified and compare the susceptibility of C. includens and A. gemmatalis to the insecticides flubendiamide, methomyl, and spinetoram. A susceptible population of each species, maintained under laboratory conditions without insecticides selection pressure for more than 17 generations, was used. Ingestion bioassays using five to eight concentrations of each insecticide applied on the artificial diet surface were used to estimate the LC50 and LC99 (LC = Lethal Concentration). The tolerance ratio (TR) was calculated by dividing the LC50 or LC99 of the most tolerant species by the respective value of the most susceptible species. Chrysodeixis includens was more tolerant to all insecticides tested than A. gemmatalis, with TR50 values of 45.9-, 10.0- and 2.6-fold for methomyl, flubendiamide, and spinetoram. These findings indicated that the risk of evolution of resistance may be higher for C. includens than A. gemmatalis due to differential survival when exposed to the same dose of insecticide applied in soybean fields. Therefore, to improve the control of both species, integrated pest management (IPM) and insect resistance management (IRM) strategies should be considered to avoid control failures in field conditions.
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页数:6
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