关键词: 生活, 防治, 昆虫

Abstract: The Coccotorus beijingensis Lin et Li was a new species reported by Lin Kaijin and Li Guixiu in March 1990 and Genus of Coccotorus is a new record from China. This paper presents brief accounts on biology and control measures of shis insect.
The insect only has a hoste[Celtis bungeana BL.], so it is called pests of single habit. This insect only has one generation a year in Beijing Region and over-winter as adult at insect gall. The adult stage is about 240 days and it comes out of the insect gall in early March of the following year and both sexs are on mating. The female lays eggs into the buds or on the young stems top in the middle part of March. Its eggs hatch into Larva in early April and they have the habit of eating in young stems to make young stems into insect gall. The Larva stage is about 150 days.
The study also showed. For the control experiment sprayiny with one of the 24% Lannatel 500 times add 40% omethoat 1000 times mixture; or 50% methamidophos 1000 times add 24% lannatel 500 times mixture; or 90% trichlorfon 1000 times add 40% omethoat 1000 times mixtures, if one of these insecticides is sprayed once in early young Larva stage, the control effect can reach 100%, but if one of these insecticides is sprayed twice, when the adult comes out of the insect gall, the cumulative control effect can also reach 100%.

Key words: LIFE, HISTORY, PREVENTIVE IREA TMENTS, INSECT