金龟子,幼虫俗称蛴螬,种类繁多,分布广。寄主范围广泛,危害多种农作物、果树和林木。果园内金龟子成虫和幼虫均可造成危害,成虫常危害多种果树的芽、花和叶,有些种类也危害果实。幼虫危害根,轻者使树体生长衰弱,重者根皮被环剥而整株枯死。 金龟子多数种类一年发生一代,少数种类需2年或更长时间完成一代。以成虫或老熟幼虫在土中越冬。一般滩地和山地果园周围树木和杂草多,适合金龟子滋生繁殖,越冬虫源往往不在果园,而在附近的荒山、渠道旁和杂草地里。以成虫越冬的种类春季成虫发生早,对果树的芽和花造成严重危害;以老熟幼虫越冬者发生稍晚,多危害叶和花,有些也危害果。 Scarabs, larvae commonly known as grubs, a wide range of widely distributed. Host wide range, endangering a variety of crops, fruit trees and trees. Adult beetles and larvae in the orchard can cause harm, adults often endanger the buds, flowers and leaves of a variety of fruit trees, and some species also endanger fruit. Larvae endanger the roots, the light so that the tree growth and weakness, in particular, the root bark is stripped and the whole plant dead. Most species of chafer occur one generation a year, and a few species require two years or more to complete a generation. To adult or mature larvae overwinter in the soil. Generally beach and mountain orchard around the trees and weeds for chaetots breeding, overwintering insects are often not in the orchards, but in the nearby barren hills, channels and weeds in the ground. The species of adult wintering spring adults occur early, on the fruit buds and flowers caused serious harm to the overwintering mature larvae occurred later, more endangered leaves and flowers, some also endangered fruit.