SELECTIVITY OF INSECTICIDES ON THE COMPLEX OF NATURAL ENEMIES IN COTTON CROP (Gossypium hirsutum L.)

Authors

  • Cecilia Czepak
  • Paulo Marçal Fernandes
  • Karina Cordeiro Albernaz
  • Ohana Daroszewski Rodrigues
  • Lucimar Martins Silva
  • Edgar Alves da Silva
  • Fábio Shigeo Takatsuka
  • Jácomo Divino Borges

Keywords:

Insecticide, biological control, Gossypium

Abstract

The selectivity of insecticides was evaluated in the complex of natural enemies of the cotton (Gossypium hirsutum L.) crop. The cultivar Deltapine was used in a randomized block experimental design, with seven treatments and four replications. The treatments, all in their commercial formulation, were: control; thiamethoxam (300 g.ha-1); lufenuron (300 mL.ha-1); betacyflutrin (800 mL.ha-1); imidacloprid (70g.ha-1); diflubenzuron (6,0 g.ha-1); and endosulfan (1500 mL.ha-1). The insecticides were sprayed at 45 days after germination. Besides the initial evaluation, other evaluations were performed three and seven days after insecticide application. Each plot was sampled by the fabric beating method, with two random beatings per plot. Natural enemies were identified and counted. Three days after application, the insecticides thiamethoxam (300 g.ha-1), lufenuron (300 mL.ha-1), and diflubenzuron (60 g.ha-1) did not showed negative effect on the complex of predators present in the cotton. However, seven days after application, only the lufenuron treatment maintained the selective effect over predator complex.

KEY-WORDS: Insecticide; biological control; Gossypium.

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Author Biography

Cecilia Czepak

Escola de Agronomia e Engenharia de Alimentos, Universidade Federal de Goiás (UFG). Campus Samambaia.
Caixa Postal 131, CEP 74001-970, Goiânia, GO. E-mail: ceciczepak@yahoo.com.br;

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Published

2007-11-02

How to Cite

CZEPAK, C.; FERNANDES, P. M.; ALBERNAZ, K. C.; RODRIGUES, O. D.; SILVA, L. M.; SILVA, E. A. da; TAKATSUKA, F. S.; BORGES, J. D. SELECTIVITY OF INSECTICIDES ON THE COMPLEX OF NATURAL ENEMIES IN COTTON CROP (Gossypium hirsutum L.). Pesquisa Agropecuária Tropical [Agricultural Research in the Tropics], Goiânia, v. 35, n. 2, p. 123–127, 2007. Disponível em: https://revistas.ufg.br/pat/article/view/2260. Acesso em: 20 dec. 2024.

Issue

v. 35, n. 2, May/Aug. 2005

Section

Research Article

License

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