he diseased death time distributions of Ectropis obliqua Prout larvae infected with itsnuclear polyhedrosis virus(EoNPV)at the beginning of every instar under four constanttemperattires(14℃ 18℃, 22℃,26℃) and natural flucttiating temperature during May andJune in Hangzhou were respectively observed The time distributions(T- distributions)ofcumulative relative cliseased death frequeney under four constant temperatures were approxi-mately consistent. Through normalizing the diseased death time all T-di...