oa Journal of the Entomological Society of Southern Africa - Aspekte van die gedrag van Dacus ciliatus Loew (Diptera: Trypetidae)

Volume 32, Issue 1
  • ISSN : 0013-8789



The effect of light, humidity and temperature on the behaviour of Dacus ciliatus was investigated and a study was made of the specific preference shown by the insect in gradients of light, humidity and temperature respectively. The mature larvae are photo-negative on leaving the fruit while the adult flies are photo-positive. The smaller the differences in light intensity between two halves of a long, narrow cage, the smaller is the response of the adults. Adult flies exhibit no definite hygroreaction but their temperature preferendum lies between 25 and 355 C (av. 29.55C)

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