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对黄芩上苜蓿夜蛾的发生规律进行了观察,并对防治用药进行了筛选试验。结果表明,苜蓿夜蛾在承德每年发生2代。以蛹在土中越冬。幼虫取食为害黄芩叶片,8月下旬至9月中旬为害最重。苜蓿夜蛾的自然天敌主要有螳螂、蜘蛛、白僵菌、绿僵菌等。其中白僵菌对幼虫的自然寄生率高低主要与当年8～9月份的降雨总量有关。雨量过大则寄生率高;药剂防治以每667 m2用30%乙酰甲胺磷EC 33 g的效果最好。
The occurrence of Scutellaria baicalensis on the law were observed, and prevention and treatment of drug screening test. The results showed that the swallow moth occurred in Chengde two generations per year. Pupa in winter in the soil. Larvae feeding on skullcap leaves, the worst damage from late August to mid-September. Alfalfa night moth natural predators are mantis, spider, Beauveria, Metarhizium anisopliae and so on. Beauveria bassiana which larvae of the natural parasitism rate mainly with the total rainfall from August to September that year. The rainfall is too large, then the parasitic rate is high; the medicament prevention and cure takes the best effect with 30% acephate EC 33 g per 667 m2.