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1989～1990年在美国堪萨斯州和俄克拉荷马州的农场进行试验。对部分麦仓分别采用推荐的入仓时用药和入仓后4～6周用药（推迟用药）两种方法进行比较。1989年使用药剂为甲基毒死蜱，试验小麦未进行气调．1990年将两种用药方法作为害虫综合防治系统的组成部分进行试验，使用了甲基毒死碑与马拉硫磷两种药剂．尽管甲基毒死碑推迟用药降低了捕虫器中捕获的害虫数，而且在储存5个月后进行生物分析，死亡率达98±1．1％，但它不能显著降低从充气麦仓中抽取的样方中的虫口密度，与对照相比也没有经济效益。使用马拉硫磷，不论是入仓时用药还是推迟用药均不能显著降低麦仓中的害虫密度。1989年秋季，对未充气的小麦，不论入仓时用药还是推迟用药均可显著减少（p＜0．05）抽样检查的害虫效（与对照相比）．在两次试验中，入仓时用药的成本指数较大．
1989 to 1990 in the United States Kansas and Oklahoma farms for testing. On the part of the wheat barrels were used when the recommended warehousing and warehousing after 4 to 6 weeks of medication (delaying medication) two methods to compare. In 1989, the pesticide used was methyl chlorpyrifos, and the test wheat did not conduct the atmosphere regulation. In 1990, two methods of drug use were tested as an integral part of the pest integrated control system. Two methylphenidate and malathion agents were used. Although deferment of Methylde intoxicated reduced the number of pests captured in the trap and bioanalysis after 5 months of storage resulted in a mortality of 98 ± 1.1% but it did not significantly reduce the number of Of the population density of insects in the plot, compared with the control and no economic benefits. Using malathion, neither the time taken nor the delay in the administration of the pesticide significantly reduced the density of pests in the barns. In the fall of 1989, pest infestation (as compared to controls) for sampling was significantly reduced (p <0.05) for uninflated wheat regardless of drug use or delay in warehousing. In the two tests, the cost index when entering warehousing is larger.