Degree-Day Accumulations and Seasonal Duration of the Pre-Imaginal Stages of the Mexican Fruit Fly (Diptera: Tephritidae)
Abstract
Degree-day accumulations and puparial duration of the Mexican fruit fly, Anastrepha ludens (Loew), in the field was found to fit closely with a degree-day accumulation model developed by Leyva-Vazquez (1988) with laboratory data. Larval development time was more variable, however, and did not agree well with the laboratory based degree-day model. This may have been caused by a tendency of the larvae to remain in the fruit beyond the necessary development time and for subsequent egression to be spread over a period of weeks. Duration of the pre-imaginal stages is strongly a function of season. The puparial stage may be prolonged up to three months in the winter or be as brief as three weeks in the summer. There was no evidence of a winter diapause.Downloads
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