林州市核桃举肢蛾的发生规律与化学防治

The Occurrence Dynamics and Chemical Control of Atrijuglans hetaohei in Linzhou

为明确核桃举肢蛾在林州市的发生规律,筛选防治核桃举肢蛾的最佳药物及浓度,进行了核桃举肢蛾生活史的系统观察及树冠喷药防治试验。结果表明,核桃举肢蛾在林州市1 a发生2代,第一代成虫发生高峰在4月中下旬,幼虫蛀果高峰为4月下旬,第二代成虫发生高峰在6月中下旬,幼虫蛀果高峰在7月上旬。采用毒死蜱1 000倍液、苦参碱500倍液和乙酰甲胺磷1 000倍液进行树冠喷雾,从核桃举肢蛾成虫发生高峰期开始,第一代成虫期喷1遍药,第二代成虫期喷2遍药,2遍间隔10 d,防治效果明显,防效在82.9%~89.0%,可以在生产中推广应用。

To clarify the occurrence dynamics of Atrijuglans hetauhei in Linzhou city and screen for the best pesticide and appropriate concentration to control it,systematic investigation of its life history and canopy spraying control were conducted.The results showed that A.hetauhei had two generations per year in the Linzhou area.The adults of the first generation were found to have a marked increase during the last20 days of April,and the infestation period of the larvae was at late April.The second generation adults emerged largely during the last 20 days of June and the trees were infested severely in the first 10 days of July by the larvae.Chlorpyrifos diluted 1 000 times,Matrine diluted 500 times and Acephate diluted 1 000 times were applied to the trees by spraying on the crown as the adults emerged,spraying once in the first generation and twice with 10-day interval in the second generation.The control efficacies were up to82.9% —89.0%,and the three pesticides could be popularized in the production.