The threshold temperature and effective accumulated temperature of Algedonia coclesalis

The developmental threshold temperature (DTT) and effective accumulated temperature (EAT) of Algedonia coclesalis Walker were determined under five constant temperatures in the range of 19～31℃. The results showed that egg,larva,pupa and adult can normally develop between 19～31℃. The optimal temperatures of the growth and development were between 28～31℃. The DTT of egg,each instar larvae from the 1st instar to the 7th instar,pupa,adult and the yearly generation were 6.63,12.51,11.18,10.93,10.05,8.01,6.80,5.78,6.20,7.81 and 8.33℃,respectively,and their EAT were 124.19,64.54,72.59,82.08,93.46,136.84,155.42,201.06,211.55,111.49 and 1 235.50 degree -day respectively.