成虫的

The melanous rate of adults was 2.75%.

成虫黑化个体占2.75％。

Fig. 1. Cumulative preadult mortality rate of Bemisia argentifolii, originating from three groups of host plant, on six

图源类作物虱在六种杂草成虫前期累积死亡率.

Therefore, the ladybird beetle could be considered as a potential biocontrol agent in controlling the pine mealybug in practice.

圆斑弯毛瓢虫对湿地松有较强食作用，通过散放瓢虫成虫和幼虫，增加林间瓢虫数量，能较好地抑制湿地松增长。