白兰花火力楠丽绵蚜的发生与防治

火力楠丽绵蚜(Formosaphis micheliae Takahashi)在广西柳州市柳北区沙塘镇广西生态工程职业技术学院校园的白兰花上,一年四季均可发生危害,10月上旬至12月中旬,虫口数量激增,危害严重,无越冬现象。该虫以成虫、若虫在白兰花的枝杆上群集吸食汁液危害。当10~12月份气温比较高时,或者1~3月份雨水多时,可抑制该虫的发生。先用清水喷淋掉害虫身上白色棉絮状蜡状物后,再喷洒40%氧乐果乳油1 000倍(或2.5%敌杀死乳油1 500倍)液防治效果好,或用40%氧乐果乳油涂抹树杆防治效果也显著,但很难达到根治。

Occurrence and control of hazards of Formosaphis micheliae Takahashi in Michelia alba

The hazard of Formosaphis micheliae Takahashi occurs throughout the year at campus of Guangxi Eco-engineering Vocational and Technical College,Shatang,Liuzhou,Guangxi.The main occurrence usually happens in early October to mid December with population booming,serious harm and no wintering phenomenon.The imaginal and nymph of Formosaphis micheliae Takahashi cluster suck the branch juice of Michelia alba.When temperature is relatively high during October to December,or raining for a long time during January to March,some measure can be taken to control the occurrence.Firstly,the white cotton wool wax of pests should be spray off away,then spraying 40% Omethoate EC 1 000 times(or 2.5% deltamethrin EC 1 500 times),which can reach a better control effect,the prevention effect of applying 40% Omethoate EC in tree trunks is better as well,but it is difficult to achieve radical.