THE EFFECT OF PRECIPITATION ON THE BREAK OF DIAPAUSE IN THE WHITE RICE BORER RUPELA ALBINELLA (Cr.) IN SURINAM (SOUTH AMERICA)
1961
DINTHER, J.B.M.
Diapause was studied in the white rice borer to find a sound basis for an effective rice stubble destruction programme. Diapausing larvae of this borer remain in the stubble after harvesting and carry the species over a period during which the hostplant may be scarce or absent. The influence of rainfall on the duration of diapause was experimentally analysed. As a rule the higher the amount of precipitation, the sooner the moths make their appearance. This break of diapause is accelerated the longer the diapausing larvae stayed in the dry stubble. It is suggested that under the prevailing weather conditions stubble destruction within one month after harvest will prevent the appearance of the moths.
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