The occurrence of Chilo sacchariphagus and its egg parasitoid wasps in sugarcane plantations in Guangxi China

文献类型： 外文期刊

第一作者： Pan, Xue-hong

作者： Pan, Xue-hong;Wei, Ji-li;Shang, Xian-kun;Huang, Cheng-hua;Nikpay, Amin;Goebel, Francois-Regis

作者机构：

关键词： Chilo sacchariphagus; Trichogramma; Telenomus; parasitism rate; population dynamics; overwintering generation

期刊名称：INTERNATIONAL SUGAR JOURNAL （ 影响因子：0.077； 五年影响因子：0.125 ）

ISSN： 0020-8841

年卷期： 2020 年 122 卷 1453 期

页码：

收录情况： SCI

摘要： The moth stalk borer Chilo sacchariphagus is the most destructive insect pests limiting the production of sugarcane in Guangxi province, China. Current control strategies are mainly focused to the application of chemical insecticides. During 2016-18, the occurrence of the overwintering generation of C. sacchariphagus and its egg parasitoid wasps Trichogramma chilonis and Telenomus dignus were investigated. Findings showed that the overwintering generation of C. sacchariphagus began to emerge in early March and the peak of adult emergence was from the mid-March to early April. At the beginning of peak period, fewer egg masses were laid by C. sacchariphagus and percentage of egg parasitism by parasitoid wasps was low. At the peak period of C. sacchariphagus, more egg masses were laid and parasitism level increased. Both Telenomus dignus and Trichogramma chilonis are dominant natural enemies in Guangxi, which play an important role to mitigate population level of stalk borers. The seasonal dynamic of egg parasitoids' parasitism was typically adapted to the natural enemy following-up pattern. The percentage of parasitism was lower at the early stage of sugarcane growth from March to April and higher (up to 90%) at the late growth stage in September which played an important role in controlling Chilo sacchariphagus.

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