Susceptibility of armyworm to insecticides by ingestion in corn crops
DOI:
https://doi.org/10.17765/2176-9168.2017v10n1p71-82Keywords:
Chemical control, Pesticides, Zea maysAbstract
Corn is one of the most relevant cereals cultivated in Brazil, with areas featuring productivity of 16 tons per hectare. However, productivity has been reduced due to several attacks by pests, particularly the fall armyworm, which seriously damage crops. Current study analyzes the basic susceptibility of insecticides (lufenurom, novalurom, methoxphenozide and spinosad) on populations of Spodoptera frugiperda. Bioassays have been undertaken for concentration-response curves for armyworms at the third instar where artificial diet cubes (1.5 x 2.5 cm), described by Greene et al. (1976), were soaked in broth with each insecticide for a second and immediately placed in previously sterilized 2.5 x 8.5 cm test tubes. The armyworms were individualized in the tubes which were buffered with hydrophobe cotton and maintained in a BOD chamber at 25ºC and a 14-hour photophase till cocoon formation. Mortality rates were reported daily till the cocoon stage and curves were calculated by Probit analysis. The insecticide lufenuron showed CL50 = 0.265 ppm; novaluron CL50 = 0.066 ppm, methoxphenozide CL50 = 4.544 ppm and spinosad CL50 = 0.970 ppm.Downloads
Published
2017-04-07
How to Cite
Storch, G., Loeck, A. E., Magano, D. A., & Remor, M. B. (2017). Susceptibility of armyworm to insecticides by ingestion in corn crops. Revista Em Agronegócio E Meio Ambiente, 10(1), 71–82. https://doi.org/10.17765/2176-9168.2017v10n1p71-82
Issue
Section
Agrobusiness
License
A Revista se reserva o direito de efetuar, nos originais, alterações de ordem normativa, ortográfica e gramatical, com o intuito de manter o padrão culto da língua, respeitando, porém, o estilo dos autores. As opiniões emitidas pelos autores são de sua exclusiva responsabilidade.Os direitos autorais pertencem exclusivamente aos autores. Os direitos de licenciamento utilizado pelo periódico é a licença Creative Commons Attribution
