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栗绛蚧 Kemes roboris(Fourcroy)谷称板栗球坚蚧 ,呈间歇性暴发成灾 ,它以若蚧和雌成蚧群集固定在 1～ 2年生板栗枝条上刺吸汁液为害 ,致使枝干枯死、树势衰退、板栗减产甚至绝收 ,是板栗生产上的主要害虫之一。对栗绛蚧防治药剂、主要天敌种类、发生期、控制作用等进行调查观察试验研究。1.防治栗绛蚧药剂试验 :用 10 %吡虫啉 WP、4 0 %速扑杀 EC、4 0 %氧化乐果 EC、2 0 %快杀灵 EC10 0 0、2 0 0 0、30 0 0倍喷雾防治初孵若蚧效果均达 10 0 % ,防治越冬若蚧效果分别为 92 .2 2～ 90 .5 % ,93.8～ 89.7%、86 .9～ 71.6 %、4 1～ 2 7% .2 .主要天敌种类及控制作用 :在捕食性天敌中 ,黑缘红瓢虫为优势种群 ,对栗绛蚧捕食率为 2 2 .2～ 30 %。寄生性天敌中以寄生蜂类占优势 ,其中以中国花角跳小蜂、胶虫红眼啮小蜂、白腊虫花翅跳小蜂、跳小蜂为优势种群。据采集雄绛蚧茧蛹 12 5 8头、雌绛蚧 10 34头培养观察结果 ,平均雄蚧寄生率为 2 1.6 2 % ,雌蚧寄生率为 9.97%。3.寄生蜂发生期与寄主雄成蚧羽化期及雌成蚧卵孵化期的观察 :雄绛蚧羽化期为 3月 2 5日至 4月 11日 ,高峰期为 3月 30日至 4月 7日。寄生雄蚧两种跳小蜂的羽化期为 3月 15日至 4月 11日 ,高峰期为 3月30日至 4月 7日 ,与寄主雄成蚧羽化高峰非?
Chestnut scale Kemes roboris (Fourcroy) valley chestnut ball scale, was intermittent outbreaks disaster, which if the scale and female scale insects fixed in 1 to 2 years old chestnut branches sucking juice damage, resulting in dead branches, The decline of the tree, chestnut yield reduction or even income, is one of the major pests on chestnut production. On the chestnut Crimsonite agents, the main types of natural enemies, the occurrence of the role of control to investigate the experimental study. 1. Prevention and treatment of Li Kenage Agent Test: 10% imidacloprid WP, 40% cucurbitacin EC, 40% omethoate EC, 20% nifedipine EC10 0,2 0 0 0,30 0 0 times The results showed that the effect of spray prevention and control on newly hatched scale was up to 100%, and the control effect of overwintering scale was 92.22 ~ 90.5%, 93.8 ~ 89.7%, 86.9 ~ 71.6% and 41 ~ 27% respectively.2 Main types and controlling effects of main natural enemies: In the predatory natural enemies, the ladybugs are the predominant population, and the predation rate of them is 22.2% ~ 30%. Among the parasitoid natural enemies, parasitic wasps predominate. Among them, Chinese small-headed bees, red-eyed peregrine beetles, white-waxed winged beekeepers, and small-bee-hoppers are dominant populations. According to the data collected from 12 58 cocoon pupal male virescens and 10 34 female vilocorous cocoon, the average male parasitism rate was 21.62% and the female parasitic rate was 9.97%. 3. Parasitic wasps and the host male adult scale and fecundity Age of adult eggs to observe the incubation period: male crimson scale of March 25 to April 11, the peak from March 30 to April 7 days. Parasitic male scale two kinds of jumping bees feathering period for the March 15 to April 11, the peak for the March 30 to April 7,