Lifetable analysis of Spodoptera exigua Hubner on alternate hosts from cotton agroecosystem for estimating annual population build-up

文献类型： 外文期刊

第一作者： Ahmad, Faheem

作者： Ahmad, Faheem;Saeed, Shafqat;Chen, Ting;Saeed, Qamar;Saeed, Qamar

作者机构：

关键词： Age-specific lifetable; beet armyworm; cropping pattern; growth strategy; population build-up

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：

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收录情况： SCI

摘要： Understanding the population growth patterns of Spodoptera exigua on alternate host plants can provide valuable information for developing an effective pest management program. In this study, using age-specific lifetable indices, we evaluated the role of alternate crops commonly found in cotton agroecosystem of Pakistan to better understand population dynamics of S. exigua. The longest larval and pupal periods (16.35 and 9.95 days, respectively) were observed on spinach, while the shortest periods were recorded on okra (13 days) and cauliflower (8.4 days), respectively. Relatively more female moths (61%) were produced on spinach with low r(m) (0.095) and lambda (1.0997) while highest r(m) (0.120) and lambda (1.1278) was on cotton. In conclusion, S. exigua use spinach for initial population build-up in the field, adopting an aggressive reproductive strategy, while castor may be utilized for dispersal as more males eclosed and dispersed to mate in the fields.

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