Bollwormsareatraditi的精選

問題詳情：Bollwormsareatraditionalthreattocottoncrops．Youngonesfeedontheboll,thepartofthecottonplantthatcontainstheseeds．AbacteriumknownasBtisabletokillbollwormsandsomeotherpests．BtisshortformforBacillusth...