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长白蚧在茶树上是一种严重虫害,通过本课题在1961—1965年的研究,明确了其发生发展规律,提出了有效的防治措施:①长白蚧在华东和华中一年发生三代,各代若虫盛孚期分别在5月中下旬、7月中下旬和9月;虫口的分布第一、二代以茶树叶片和枝干中上部为多,第三代以枝干中下部为多。②枝干皮层嫩薄的茶树有利其为害;高温低湿的气候对卵和
Long white scale in tea is a serious insect pests, through the subject in 1961-1965 years of study, the development of its clear rules, put forward effective prevention and treatment measures: ① long white scale occurs in East China and Central China three generations a year, each generation Nymph Sheng Fu stage respectively in late May, mid-late July and September; the first distribution of insect population, the second generation of tea leaves and branches in the upper part of more, the third generation of branches in the lower part of more. ② branches of thin cortex tea tree is beneficial to its harmful; high temperature and humidity of the egg and the climate