Influence of temperature on the experimental population of the pine shoot beetle, Tomicus piniperda (L.) (Col., Scolytidae)
1994
Hui, Y. (Yunnan Univ. (China). Inst. of Ecology and Geobotany)
This paper deals with the influence of temperature on the development, survival, and reproduction of the pine shoot beetle, Tomicus piniperda (L.) at 5 constant temperatures from 10-30 degrees C. The threshold temperature and the endurance of the beetle to minimum and maximum temperature were also studied. The development time of egg, larval, pupa decreased with temperature from 10 to 30 degrees C. For these stages the threshold temperatures were calculated to be about 8.23, 7.2, 7.85 degrees C, and the effective heat sum required for finishing the developments were 95.8, 358.12, 115.87 D (day-degree) respectively. The survival rate reached maximum at 20-25 degrees C, and decreased at higher or lower temperature. The pine shoot beetle can survive at the low temperature of -5 degrees C, but cannot survive when temperature is higher than 35 degrees C. The egg number reproduced by one female a day increased with temperature from 10 to 25 degrees C, and at 25 degrees C it was about 6
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