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柿绵蚧是一种单食性害虫,只危害柿树,果实被害后表面出现凹陷的虫疤,群众称之为“麻脸柿子”,也造成“烘果”,如不及时采摘就自行脱落,因柿烘造成损失达15％以上。所以,提高果品产量和质量,消除柿绵蚧为害,是当前农民迫切要求解决的问题。一、发生规律柿绵蚧在河北省满城县每年发生四代,以初龄若虫在1～6年生枝及1年生徒长枝的阴面群集越冬,10月中旬至次年4月下旬为越冬期,历期200天左右。第一代发生期为5月下旬至7月末,历期60天左右,若虫孵化盛期在6月下旬,正是落花以后幼果生长期,多数虫子转移到幼果上为害,少数在
Persimmon mealybug is a simplex pest, only endanger persimmon, the surface of the fruit after the killing of the depression of insect scars, the masses call it “Plum persimmon,” also caused “baked fruit”, if not in time to pick on their own off, because Persimmon bake into a loss of up to 15%. Therefore, increasing the output and quality of fruit products and eliminating the persimmon mealybugs is an urgent problem that peasants are now demanding to solve. First, the occurrence of regular persimmon Maya occurred in Mancheng County, Hebei Province, four generations each year, to the first instar nymphs in 1 to 6 years branches and 1 year old branches of the negative clusters of winter, from mid-October to the following year in late April for the winter Period, the duration of about 200 days. The first generation occurred from late May to the end of July, the duration of 60 days, nymph incubation peak in late June, it is after the flowering young fruit growth period, the majority of insects transferred to young fruit damage, a few in