日本单蜕盾蚧的研究

日本单蜕盾蚧ＦｉｏｒｉｎｉａｊａｐｏｎｉｃａＫｕｗａｎａ在陕西主要危害白皮松。年发生２代，以若虫在针叶上越冬。每年５月中、下旬为第一代孵化盛期，是化学防治最有利时机。雌雄性比２．４：１，雌虫产卵量平均为２１粒。发现松蚧阿错小蜂Ａｚｏｔｕｓｓｐ．和蚧虫棒小蜂Ｓｉｇｎｉｐｈｏｒｉｎａｓｐ．两种天敌，自然寄生率为４３．１６％，对蚧虫有较强的控制能力。使用４０％氧化乐果１０００倍液、２０００倍液以及８０％敌敌畏１０００倍液，在第一代若虫孵化期防治，均有较好的杀虫效果。

The Biology and Control of Fiorinia japonica

Fiorinia japonica seriously damaged Pinus bungeana in Shaanxi Province. It happened 2 generations per year and survived the winter on the branches and needles by the nymphs of the second generation.The peak hatching period of the first generation occurred in the middle and late May, which was the best time for chemical control.The ratio of female to male was 2. 4: 1. A female laid 21 eggs averagely. Azotus sp.and Signiphorina sp. were found to be the main natural enemies with 43. 16% natural parasitic rate, which was of strong power to control Fiorinia japonica. If 1000 and 2000 times liquid of 40% omethoate and 1000 times of DDVP were used during the hatching period of the first nymphs, the death rate would be quite high.