COMPARISON OF INSECTICIDE CONTROL EFFECTIVENESS OF Plutella xylostella (LEPIDOPTERA: PLUTELLIDAE) IN CABBAGE

Abstract

The research was carried out in an area under continuous cabbage cropping (Brassica oleracea var. capitata) in Goianápolis, Goiás State, Brazil, from September to November 1996. The aim was to compare insecticides for diamondback moth (Plutella xylostella) control. The experimental design was randomized blocks with eight treatments and four replications. The treatments were teflubenzuron in the doses of 25 mL, 30 mL and 40 mL of commercial product (c.p.) / 100 L of water; chlorfenapyr in the doses of 30 mL, 50 mL and 100 mL of c.p./ 100 L of water; deltamethrin in the dose of 30 mL of c.p. / 100 L of water; and control. Treatments were applied weekly after transplanting. Evaluations were made at harvesting, counting the number of holes caused by moth in five randomly chosen commercial cabbage heads per plot. The insecticides teflubenzuron and chlorfenapyr were more efficient than deltamethrin in the control of moth P. xylostella.