ABSTRACT
The effect of Bacillus thuringiensis and chemical insecticides (fenitrotion and trichlorfon) for the control of Argyrotaenia sphaleropa (Meyrick, 1909) (Lepidoptera: Tortricidae) was evaluated in the laboratory and in a commercial vineyard. In the laboratory at 26 ± 1º C, relative humidity of 70 ± 10% and 14h photophase, using grapevine leaves with artificial infestations of third to fourth instars, B. thuringiensis var. kurstaki (Dipel DF® 50, 75 and 100 g/100L), fenitrothion (Sumithion® 500 CE, 150 mL/100L) and triclorfon (Dipterex® 500, 300 mL/100L) were efficient for A. sphaleropa larvae control, reducing the insect population by more than 90%. In the commercial vineyard, A. sphaleropa adults continued being caught in pheromone traps during the whole experiment (from December of 2003 to March of 2004), with a peak at the beginning of February. In field conditions, all insecticides and doses reduced the South American tortricid moth damage in the bunches between 83.3 and 94.4%. The control of B. thuringiensis was equivalent to the chemical insecticides fenitrothion and trichlorfon.
KEY WORDS
South American tortricid moth;
Argyrotaenia sphaleropa
;
Bacillus thuringiensis
; grape; control alternatives
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