朝鲜球坚蜡蚧的发生规律和防治技术研究

朝鲜球坚蜡蚧在陕西省苹果园1a发生1代,以2龄若虫在枝条缝隙处越冬。4月至5月为主要为害期。此虫主要为害苹果树枝条,也为害叶片、果实。防治上应重点抓好果树开花前越冬若虫期和6月至7月1龄若虫期的化学防治。开花期~幼果期应以保护利用天敌为主,尽量避免喷洒化学农药。

The Regularity of Outbreak and Control Technique of Korean Iecanium, Didesrnococcus korecmus Borchs

Didesrnococcus Korecums Borchs occurs 1 generation per year in apple orchard of Shaanxi. Its second instar nymphs overwinters in the crack of the apple tree braches. The main damaging period of the insect pest appears in April-May,it does harm to the twigs, branches of apple tree mostly, and injures also leaf and fruit of apple. The occurrence phase of ovewintering nymphs before blossom and the first instar nymphs phase in June-July are a key point of chemical control. The protecting and u sing the natural enemy of the insect pest should be used as a main measures and spraying chemicals should be avoided in blossom-young fruit.