益智桃蛀螟的识别及防治

Identification and Control of Conogethes punctiferalis Infesting Alpinia oxyphylla Miq.

为了给南药益智生产上的虫害防治提供科学参考,对益智桃蛀螟[Conogethes punctiferalis (Guenée)]在局地发生为害的情况进行观测统计。结果表明,不同荫蔽度橡胶林下益智株丛的受害率为37%～58%,果串受害率为31%～48%,产量损失为28%～52%,株丛受害率、果串受害率及产量损失均表现为高荫蔽区>中荫蔽区>轻荫蔽区,在花期喷施1次毒死蜱防治桃蛀螟可降低其受害率及损失。以该案例为基础,重点阐述益智桃蛀螟的为害症状及其形态特征,同时提出防治对策。

Occurrence of Conogethes punctiferalisin Alpinia oxyphylla Miq.in part of the C.punctiferalis producing areawas monitored for statistical analysis to provide references for the control of C.punctiferalis.The results showed that A.oxyphylla Miq.at different levels of shade under rubber trees had infesting rates of 37%~58%in plants and 31%~48%in fruit and suffered a yield loss of 28%~52%,and that the infesting rates of the plants and fruit and the yield loss under different levels of shade all showed a trend of high shading zone >medium shading zone >low shading zone in the rubber plantations.C.punctiferalis was controlled with chlorpyrifos by spraying once during the flowering stage to reduce the infesting rates and the yield loss of A.oxyphylla Miq..The infestation symptoms and morphological characteristics of C.punctiferalis were described,and the control strategies for this pest were put forward.