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防治梨星毛虫药效试验于１９９５年４月中旬梨星毛虫越冬幼虫出蛰盛期进行喷药防治，５月中旬再补喷１次。共设５个处理：①２５％灭幼脲Ⅲ号１０００倍；②８０％敌敌畏乳剂１５００倍；③９０％敌百虫晶体１５００倍；④２０％氰戊菊酯乳剂３００倍；⑤喷清水对照。各处...
Pear Caterpillar pest control efficacy test in mid-April 1995 pear star caterpillar overwintering larvae spray out of the heyday of spray control, mid-May make up spray again. A total of five treatments: ① 25% chlorbenzuron Ⅲ 1000 times; ② 80% dichlorvos emulsion 1500 times; ③ 90% trichlorfon crystal 1500 times; ④ 20% fenvalerate emulsion 300 times; ⑤ spray water control. throughout...