Ecologia aplicada de pectinophora gossypiella (Saunders, 1843) : lepidoptera, gelechiidae

AUTOR(ES)
DATA DE PUBLICAÇÃO

1986

RESUMO

In the present work the populational fluctuation of P. gossypiella was studied in different fields and seasons under different control conditions. Also, pheromonic baits and traps as well as sexual circadian activity were evaluated. Utilizing delta traps, a cyclic behavior was detected during our observations. In fields treated conventionally in February, March and April. However, in fields treated by sexual pheromone, high levels were reached, at least, a month later. The boll infestation increased according to the food resources abundance, and the number of larvae per boll increased according to the reduction in the quantity of bolls present during the end of the season. High capture levels were observed during September and November. This population is called "Suicidal generation", since the adults fail to complete their life cycle. Three aerial applications of the sexual pheromone were sufficient to maintain the adults and larvae populations of P. gossypiella at relatively low levels during the 1981 / 82 cotton season. Moths were attracted from adjacent fields conventionally treated, decreasing the pest control efficiency in the end of the cotton season. Comparisons between "male confusion", "attract n kill" and chemical conventional methods, showed that there wasn t significant difference among the two first methods in suppressing P. gossypiella populations. Chemical control method showed to be less effective. ...Note: The complete abstract is available with the full electronic digital thesis or dissertations.

ASSUNTO(S)

ecologia agricola algodão - doenças e pragas

ACESSO AO ARTIGO

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