论文部分内容阅读
防治苹果红蜘蛛新方法先用７５０－１０００ｋｇ水与石硫合剂原液调制成０．１－０．２°Ｂｅ石硫合剂，再混入４５％水胺硫磷孔油５００ｍｌ，即配成１５００－２０００倍的混合液。喷药最佳时间在第一代幼螨发生期，以晚熟品种谢花后１０－１５天为宜。一般喷后２小时螨...
A new method of prevention and treatment of apple red spider first with 750-1000kg water and stone sulfur mixture of raw liquid preparation of 0.1-0.2 ° Be stone sulfur mixture, and then 45% aqueous ammonia parathion hole oil 500ml, which dubbed 1500-2000 Times the mixture. Spraying the best time in the first generation of larvae occurred, to late varieties 10-15 days after Xiehua desirable. 2 hours after the general spray mites ...