Dissertação
Controle de Helicoverpa armigera (Hübner) (Lepideptera: Noctuidae) na cultura da soja com diferentes inseticidas, volumes e pontas de pulverização
Fecha
2015-11-05Registro en:
BARBOZA, Julio Cesar Lengler. Insecticides efficiency in control of Helicoverpa armigera on soybean. 2015. 62 f. Dissertação (Mestrado em Engenharia Agrícola) - Universidade Federal de Santa Maria, Santa Maria, 2015.
Autor
Barboza, Julio Cesar Lengler
Institución
Resumen
Currently, there is few information about the management of Helicoverpa
armigera with insecticides on soybean. Thereby, the aim of this study was to verify the
efficiency of insecticides in the control of Helicoverpa armigera on soybean. The
insecticides Clorantraniliprole (Premio® 200 SC) 50 mL.ha-1, Flubendiamide (Belt®
480 SC) 70 mL.ha-1, Indoxacarbe (Avatar®) 400 mL.ha-1, Espinosade (Tracer®) 70
mL.ha-1, and Clorfenapir (Pirate®) 1000 mL.ha-1 were evaluated. Treatments were
sprayed on 50 m² plots with a CO2 pressurized backpack sprayer. Subsequently, leaves
were collected in each plot at zero, 5, 10, 15, and 20 days after spraying, and were used
to feed caterpillars. As new leaves were collected, another group of second- instar
caterpillars was used to determine the residual effects of the insecticides tested. The
evaluations in the laboratory were performed at 3, 7, and 10 days after the beginning of
the feeding. The experiment was organized in a randomized complete block design,
factorial 6x5, with 20 repetitions of one caterpillar each. The insecticide Clorfenapir had
the greater shock effect, and the insecticides Clorantraniliprole and Flubendiamide had
the longer-lasting residual effect when compared to the insecticides Indoxacarbe and
Clorfenapir. All the insecticides evaluated were efficient to control H. armigera, except
the insecticide Espinosade.