Abstract
To contribute to the knowledge on biology and control of the fruit and stem flies of manihot, Anastrepha pickeli Costa Lima and A. manihoti Costa Lima (Diptera: Tephritidae), 4 different diets were tested and fecundity was determined. The observations were made during 13 weeks within cylindrical screen cages. The diet based on Brewers yeast produced an increase in fecundity of 50 eggs per 10 females per week over the other diets. The same yeast was used as bait for adult control in the field, mixed with ethyl-0-nitrophenyl (ΕΡΝ), 0.1%, applied to 4 months old manihot plants and compared with 3 other treatments: EPN alone, EPN molasses, EΡΝ yeast molasses, giving the best results EPN yeast.
Furthermore two different types of traps to capture adults of Anastrepha spp. were evaluated, being the most efficient one of the McPhail type. Within these traps natural and synthetic substances were evaluated as attractants for the flies. With hydrolized corn (2%) always a higher number of adults was captured, even with low populations.
For larval control under field conditions two insecticides in three dosages were compared: carbofuran, soil application and fenthion, foliage spray. The most efficient and economic product was fenthion 0.15o/o.
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