Aspectos biológicos de Anastrepha Obliqua I (Macquart, 1835) (Diptera, Tephritidae) em dieta semi-artificial sob condições semi-naturais em Manaus-Amazonas

Abstract

The aim of this study was to contribute to the knowledge of Anastrepha obliqua (Macquart, 1835), an important agricultura1 fruit-fly pest using a mass rearing technique with artificial diets. Studies of insects biology are basis to development a pest control. For this the effect of different artificial diets on maggots and adults, on number of insects per cage, on the solution for eggs maintenance and on artificial structure for oviposition was evaluated. We conciued that an artificial diet with powered dehydrated araçá-boi (Eugenia stipitata) fruit, yielded a better larva1 development, at 20, 30 and 40% of fruit. The time of development was recorded as 43.2; 43 and 41.6 days, respectively. For rearing adults, the artificial diets consisting of sugarcane hydrolyzed with sugar (10%) (D') yielded much more adults, with a development of 48 days (egg=4; maggots=23.2; pupa=2 0.9 days) . The best solution for the maintenance of eggs was distilled water at a temperature of 30°c, with 32% of eclosion for larvae. The females did not show any preference to the artificial structures tested for ovipositioii. They laid the eggs on the cloth which covered the cage. To obtain a higher number of maggots and adults the most efficient number of insects per cage (15X12X15 cm) was 20 pairs, fed on D ~ ,fo r maggots reared on artificial diets with 20% of powered dehydrated araçá-boi fruit. For the first time, it was shown that the use of an artificial diet containing 20% of powered dehydrated araçáboi fruit allows the development of F1, with reproductive viability. The time of development was 43.3 days (egg=4; maggot=26.3 and pupa; 13 days) .