Effects of irrigation on the performance of cotton bollworm, Helicoverpa armigera (Hubner) during different pupal stages

文献类型： 外文期刊

第一作者： Yu, Fu Lan

作者： Yu, Fu Lan;Zhai, Bao Ping;Chen, Fa Jun;Yu, Fu Lan;Wu, Gang

作者机构：

关键词： Helicoverpa armigera;irrigation;soil moisture;pupation;performance

期刊名称：INTERNATIONAL JOURNAL OF PEST MANAGEMENT （ 影响因子：1.907； 五年影响因子：1.849 ）

ISSN： 0967-0874

年卷期： 2008 年 54 卷 2 期

页码：

收录情况： SCI

摘要： Pupation of cotton bollworm, Helicoverpa armigera (Hbner), occurs in the soil. This may be a weak link in the life-cycle, exploitable through cultivation, in the control of this important pest. We evaluated the effects of irrigation on the performance of H. armigera. It did not affect the numbers of larvae entering the soil. However, irrigation treatments made on the 2nd, 3rd and 10th day after larvae entered the soil significantly reduced moth emergence (27, 19 and 28.7% emerged from the respective treatments, compared to 93.7% emerging from the control). Irrigation did not affect the time taken from the larva entering the soil to female adult emergence, but it significantly delayed the time in males. Realized fecundity of the emerging H. armigera adults was significantly decreased by irrigation treatment, especially on the 10th day, with a mean of only 367 eggs laid per female. Irrigation after larvae entered the soil substantially decreased survival of H. armigera, and the increase in the size of the generation following irrigation was only 2.8 times for the irrigation treatments on the 3rd and 10th day after larva entered the soil, respectively, compared with that of the control treatment. We suggest utilizing irrigation practices to suppress overwintering pupal numbers, in order to control the spring generation of H. armigera.

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