Potential of mungbean, Vigna radiatus as a trap crop for managing Apolygus lucorum (Hemiptera: Miridae) on Bt cotton

文献类型： 外文期刊

第一作者： Wu, K. M.

作者： Wu, K. M.;Guo, Y. Y.;Wyckhuys, K. A. G.

作者机构：

关键词： Agriculture;Pest Assessment Control and Management

期刊名称：CROP PROTECTION （ 影响因子：2.571； 五年影响因子：3.11 ）

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收录情况： SCI

摘要： In recent years, the mirid Apolygus lucorum has become the key insect pest of Bt cotton in China. Currently, insecticide use is the sole pest management option available for most Chinese cotton farmers. As irrational pesticide use may have several undesirable effects, environmentally sound and sustainable management alternatives are urgently needed. In this paper, we evaluate the potential of mungbean, Vigna radiatus as a trap crop for A. lucorum in Bt cotton. Plant suitability trials showed that A. lucorurn population densities on mungbean were significantly higher than those on cotton. Large-scale field experiments were conducted during 2006 and 2007 to determine the effectiveness of mungbean strips for managing A. lucorum in Bt cotton fields. In this experiment, 0.1 ha Bt cotton fields were established, and mungbean strips covered approximately 10% of the total area. With periodical insecticide applications in mungbean strips, average mirid population densities in cotton fields were 18.1 +/- 2.1 individuals per 100 plants, versus 36.0 +/- 3.4 in the fields without mungbean strips in 2006. However. A. lucorum population still surpassed economic threshold (i.e., 5, 10, and 20 individuals per 100 cotton plants at the seeding stage, the squaring and flowering stages, and the belling; stage, respectively). In 2007, aside from the insecticide sprays within the mungbean strips, 2-3 insecticide applications were done in the cotton field. As a result, A. lucorum populations were kept below economic threshold, and the total amount of insecticides reduced about 70% of those used in the common chemical-controlled fields. Our work shows that mungbean has considerable potential as a trap crop in Bt cotton fields, and its adoption by Chinese farmers very likely will reduce current levels of pesticide use in this crop. (C) 2008 Elsevier Ltd. All rights reserved.

分类号： S5

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