云南主要蔗龟的生物学研究

蔗龟是云南甘蔗上的1种主要地下害虫。经1987～1991年系统研究，大等鳃金龟、暗褐鳃角金龟、突背蔗金龟是云南危害甘蔗的优势种。前两种主要以幼虫为害根部，造成减产，严重的无收；第三种主要以成虫咬食蔗苗基部，造成枯心死亡。3种均1年发生1代。成虫有趋光性，初孵幼虫喜食已腐烂的有机质。在沙壤土、粘土较重土壤虫口较多；宿根年限越长受害愈重。蔗稻轮作；7～8月雨季用水淹灌蔗地；结合松、培土每亩施用3％甲基异柳磷颗粒剂4～5kg，防治效果达90％左右。

Studies on the biology of main cane beetles in Yunnan Province

In our studying 1987-1991, we discovered Exolontha serrulata(Gyllenhal),Holotrichia parallela Motschulsky and Alissonotum impressicolle Arrow are dominant insect pests of cane in YunnanProvince. Within them, Iarvae of the former two species damaged cane root which caused reductionof output; aduit of the last species eats cane plant caused withered heart and death. All three specieswith one generation per year. Adult phototaxis and first instar larva eat rotten organic matter. Thereare more beetles in sandy loam and puddled soil. The longer the fixed number of years oi perennialroot, the injured more serious. Crop rotation of sugarcane and rice, basin irrigation of water in JulyAugust, by applying 3% isofenphos-methyl 4-5kg/mu when loosenthe soil and hill up, the efficiencyreached about 90%.