• Korean journal of applied entomology
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• v.37 no.2
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• pp.137-142
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• 1998

The regional distribution and some ecological characteristics of Chinese white-wax scale, Ericerus pela Chavannes, were investigated from 1996 to 1997. It was found that 10.8% of the stems of the privet, Ligustrum obtusifolium infested with the scale in Chtingpyijng, whereas only 1.1% of them infested in Y6ngwol and Pyongtaek. The average survival rate of the female adult marked 85.3% after it hibernated on the privet, Ligustrum obtusifolium. A female laid 7,783.5 eggs in average and 36.7% of females fell on the range of 7,000-10,000 eggs. It sized 0.40 mm in length and 0.21 mm in width. The hatchability was highest at 27$^{\circ}$C with 66.8% and it seemed the optimum temperature for incubation. The pupation rate was lower than 50.0% at the above experimental temperatures and the emergence rate marked 67.3% at 25$^{\circ}$C. When the egg was preserved at the various low temperatures, it was found that the egg could be preserved at lS$^{\circ}$C for 50 days in maximum.