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采用点滴法测定了马拉硫磷和溴氰菊酯及其混剂对玉米象成虫的毒力。结果证明：马拉硫磷溴氰菊酯混剂以ＡＢ相混时对玉米象有一定的增效作用（共毒系数为１３８．４），其余配比均表现出独立的杀虫作用。通过带药饲料法证实了马拉硫磷溴氰菊酯混剂对玉米象、赤拟谷盗、麦蛾和黄粉甲的防治效果。结果显示，该增效配剂对玉米象、赤拟谷盗和麦蛾有良好的防治作用，经济实用，在０．０５％的剂量下，药后第４０天的防效均在９０％以上；但对黄粉甲的防效甚微。
The toxicity of malathion and deltamethrin and their mixture to adults of corn was determined by using the drip method. The results showed that malathion and deltamethrin mixture had some synergistic effects on maize elegans when mixed with AB (the co-toxicity coefficient was 138.4), and the rest proportions showed independent insecticidal effects. The effect of malathion-deltamethrin on the control of corn, red moth, moth and yellow powder A was confirmed by medicated feed method. The results showed that the synergistic adjuvant had good preventive and therapeutic effects on corn, mimicry and moth and was economical and practical. Under the 0.05% dose, the efficacy of the synergist was above 90% on the 40th day ; But little effect on the yellow powder A.