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通过1974～1978年试验证明,东北大黑鳃金色(Holotrichia diomphalia Bates)二年发生一代。成虫逢双年份越冬量多,幼虫逢单年份越冬量多。成虫在日平均气温12℃以上、10厘米土层日平均地温1423左右出土;自出土10天前后进入盛期,这期间逐日累加虫量约占全年出土总量50%,是消灭成虫的适期。成虫多集中在大豆、花生等田块取食、交尾和产卵,故上述茬口为重点防治田。在主要以幼虫越冬年份,春季4月上旬上移,4月末进入耕层,5月上旬至6月中旬是幼虫危害盛期。取田间患病幼虫分离出乳状菌(Bacillus sp)菌株,用人工回接幼虫,致病率较高。其田间自然致病力及防治效果等待进一步试验。
The test from 1974 to 1978 proved that the Northeast black gill gold (Holotrichia diomphalia Bates) two generations occur. The number of adults overwintering every two years, more than a single year of larvae per winter. Adult average daily temperature above 12 ℃, 10 cm soil layer average daily temperature of about 1423 unearthed; 10 days before and after the excavated into the flourishing period, during which the accumulated amount of accumulated accounts for about 50% of the annual total, is to eliminate adult period. Adult and more concentrated in soybeans, peanuts and other plots feeding, mating and spawning, so the crop is the focus of prevention and control cropland. Mainly larvae wintering years, the spring moved up in early April, entered the tillage in late April, early May to mid June is the larvae of the peak. Take the diseased larvae isolated from the field of Bacillus (Bacillus sp) strains, artificial rewrap larvae, a higher incidence. Its natural pathogenicity in the field and the prevention and treatment of awaiting further tests.