Effect of Temperature on The Development of Woolly Apple Aphip,Eriosoma Lanigerum (Hausm.)

This paper deals with the basic biology of woolly apple aphid Eriosoma lanigerum (Hausm.)for the effective control of this pest.The base development temperature was 13.42℃ for the first instar,9.45℃ for the second instar,6.57℃ for the third instar,5.34℃ for the fourth instar respectively.Effective thermal summation of the whole generation was 186.98 day-degree.Maximum mean fecundity of each female was 91.58 under 25℃ condition.The developmental models of various instars with temperature were given as follows:100/N=30/1+EXP(5.799-0.2719T) for instar one 100/N=59/1+EXP(3.636-0.1842T) for inatar two 100/N=50/1+EXP(2.834-0.1937T) for instar three 100/N=44/1+EXP(3.321-0.2091T) for instar four 100/N=11/1+EXP(4.230-0.2121T) for whole generation.