根据两年来的实践证明：用石硫合剂防治小麦病虫害效果最好。其配制方法是：取硫磺粉1千克、生石灰500克、清水5千克，先用少量清水将石灰融化，再加清水5千克倒入大铁锅内，然后将硫磺粉用细筛筛入锅中并调成糊状，水烧.
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