Biological activity of Bt proteins expressed in different structures of transgenic corn against Spodoptera frugiperda

被引：11

作者：

Bernardi, Daniel ^{[1
]}

Bernardi, Oderlei ^{[1
]}

Horikoshi, Renato Jun ^{[1
]}

Salmeron, Eloisa ^{[1
]}

Okuma, Daniela Miyuki ^{[1
]}

Omoto, Celso ^{[1
]}

机构：

[1] Univ Sao Paulo, Escola Super Agr Luiz de Queiroz, Dept Entomol & Acarol, Av Padua Dias 11, BR-13418900 Piracicaba, SP, Brazil

来源：

CIENCIA RURAL | 2016年 / 46卷 / 06期

关键词：

fall armyworm; Bacillus thuringiensis; Bt corn; insect resistance management; LEPIDOPTERA-NOCTUIDAE; INSECT RESISTANCE; MAIZE; GENETICS; COTTON;

D O I：

10.1590/0103-8478cr20150047

中图分类号：

S3 [农学（农艺学）];

学科分类号：

0901 ;

摘要：

Spodoptera frugiperda (J. E. Smith) is the main target pest of Bt corn technologies, such as YieldGard VT PRO (TM) (Cry1A.105/Cry2Ab2) and PowerCore (TM) (Cry1A.105/Cry2Ab2/Cry1F). In this study, it was evaluated the biological activity of Bt proteins expressed in different plant structures of YieldGard VT PRO (TM) and PowerCore (TM) corn against S. frugiperda. Complete mortality of S. frugiperda neonates was observed on leaf-disc of both Bt corn technologies. However, the mortality in silks and grains was lower than 50 and 6%, respectively. In addition, more than 49% of the surviving larvae in silks and grains completed the biological cycle. However, all life table parameters were negatively affected in insects that developed in silks and grains of both Bt corn events. In summary, the low biological activity of Bt proteins expressed on silks and grains of YieldGard VT PRO (TM) and PowerCore (TM) corn can contribute to the resistance evolution in S. frugiperda populations.

引用

页码：1019 / 1024

页数：6

共 22 条

[1] A method of computing the effectiveness of an insecticide [J].