苹果小吉丁虫,又叫苹果金蛀甲、旋皮虫、串皮虫。它是果树检疫害虫之一。 1.形态特征。成虫雌虫体长7～9毫米,雄虫体长略短;体色呈紫铜色,有金属光泽;头部扁平。幼虫体长16～22毫米,乳白色,头小、褐色。 2.生活史及其发生规律。苹果小吉丁虫一年发生一代。它以幼龄幼虫在果树枝干表皮下过冬,翌年清明前后开始在枝干皮层 Apple ji jiling insects, also known as apple gold borer, rotten leather worms, insects tandem insects. It is one of the fruit tree quarantine pests. Morphological characteristics Adult female body length 7 ~ 9 mm, male slightly shorter body length; body color was copper, metallic luster; flat head. Larvae body length 16 ~ 22 mm, milky white, small head, brown. 2 life history and its occurrence. Apple ji jiling insects occur a generation a year. It young larvae in the fruit tree stems dry skin epidermis, the following year before and after Ching Ming in the branches of the cortex