Larval development ofSpodoptera eridania andSpodoptera frugiperda fed on fresh ear of field corn expressing theBt proteins (Cry1F and Cry1F + Cry1A.105 + Cry2Ab2)

Ciência Rural

Bortolotto, Orcial Ceolin²  Bueno, Adeney de Freitas¹  Queiroz, Ana Paula de³  Silva, Gabriela Vieira⁴ 

[1] Embrapa Soja, Londrina, Brazil;Universidade Estadual do Centro Oeste, Guarapuava, Brasil;Universidade Federal do Paraná, Curitiba, Brazil;Universidade Estadual de Londrina, Londrina, Brazil

关键词: biology;    integrated pest management;    fall armyworm;    Southern armyworm;    varietal resistance;   

DOI  :  10.1590/0103-8478cr20151461

学科分类：农业科学（综合）

来源: Universidade Federal de Santa Maria * Centro de Ciencias Rurais

【 摘 要 】

: The objective of this study was to evaluate extent of larval period, larval survival (%), food consumption, and pupal biomass of Spodoptera eridaniaandSpodoptera frugiperda(Lepidoptera: Noctuidae) fed on fresh ears of field corn expressing Bt proteins (Cry1F and Cry1F+Cry1A.105+Cry2Ab2). Larvae of Spodopteraspp. survived less than two days when they consumed Bt corncobs and showed 100% mortality. Spodoptera eridaniareared on non-Bt corn cobs showed higher larval development (21.6 days) than S. frugiperda(18.4 days) and lower viability (56.4% and 80.2% for S. eridaniaandS. frugiperda, respectively). A higher amount of corn grains was consumed by S. eridania(5.4g) than by S. frugiperda(3.9g). In summary, this study demonstrated that the toxins Cry1F and Cry1F + Cry1A.105 + Cry2Ab2 expressed in fresh corn cobs contributed to protect ears of corn againstS. frugiperdaand the non-target pest S. eridania. However, itis important to monitor non-Bt cornfields because of the potential of both species to cause damage to ear sof corn.

【 授权许可】

Unknown