枣桃六点天蛾Marumba gaschkewitschi gaschkewitschi(Bremeret Grey)的研究(一)

STUDY ON MARUMBA GASCHKEWITSCHI GASCHKEWITSCHI (BREMER ET GREY)

枣桃六点天蛾年发生2 代,以蛹在表土层越冬,越冬代蛹翌年5 月上旬开始羽化,5月下旬～6 月上旬为发生盛期。第1 代成虫7 月上旬羽化,7 月中下旬为发生盛期。幼虫经6龄。4 龄开始为暴食期。幼虫对枣叶利用率为47.55% ,排粪率为37.4% 。粪便含水量1～4 龄占49.54% ,5～6 龄占55.56% 。幼虫排粪共1 335 粒,共重4 639 m g。成虫趋光性强。

There are two generations of M.gaschkewitechi goschkewitechi (bremer et Grey) a year, M.gaschkewitechi survive the winter in the form of pupa,beginning its ecloion during the first the days preiod of a month in the next year and growing luxuriantly from the last ten day period of May to the first ten day period of July,whose larvae go through six stages.After the fourth stage the larvae eat too much each time,and can damage 47.55% of the date leaves.The proportion of excrement is 37.4%.A larvae excretes 1 335 grains of excreta.weighing 4 639 mg.The moisture content excrement from the first stage to the fourth stage is 49.54%,and 55.56% from the fifth stage to the sixth stage.The adult has phototaxis.The feeding method and the life habits were found out through research,which provide basis for the insect tea production.