关中地区大叶黄杨窄吉丁虫发生与防治

Agrilus nakanei kurosawa:Occurrence and Control Method

对大叶黄杨窄吉丁的发生规律进行了研究,表明大叶黄杨在关中地区一年发生一代,以幼虫在韧皮树下越冬,翌年6月中旬羽化,下旬产卵,7月上旬幼虫孵化进入大叶黄杨枝条危害。该虫在5~7月极度干旱时发生严重;树龄越大发生越严重;高速公路中间绿化带中的大叶黄杨被害重于机关庭院。通过剪除被害枝条和用氧化乐果溶液灌根进行防治具有明显效果。

Agrilus nakanei kurosawa＇s morphological characteristics,life cycle and occurrence regularity were observed with randomly survey and panel survey.The results showed that it happens in one generation per year in Guanzhong area,overwintering in form of larva in barks and beginning eclosion and laying eggs in June.In early July,hatched larva attacking the branch of trees.Pest infection becomes more severe from May to July,especially when it comes to extremely dry.The older the tree is,the greater the damage is.Euonymusjaponicus Thunb in middle green belts of highway is much more damaged by Agrilus nakanei kurosawa than those in courtyard.Pruning and filling omethoate solution to root generated better effect of control.