摘要
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The effects of intercrops on the incidence of pests and on the yield of aubergine were studied in Madurai, Tamil Nadu, India, during July-December 2006. The intercrops were cowpea (cv. Co. 2), black gram, sunflower, cluster bean, ...
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The effects of intercrops on the incidence of pests and on the yield of aubergine were studied in Madurai, Tamil Nadu, India, during July-December 2006. The intercrops were cowpea (cv. Co. 2), black gram, sunflower, cluster bean, maize, Coriandrum sativum (cv. Co 6), fenugreek, Amaranthus sp., Sesbania grandiflora, Sesamum indicum, Capsicum annuum, Tagetes erecta and onion. Aubergine intercropped with cluster bean (4:1) resulted in the lowest shoot damage (115%) and fruit damage on number and weight basis (17.0 and 17.3%, respectively) caused by Leucinodes orbonalis, and lowest mean populations of Coccidohystrix insolita (41 per 3 leaves) and Aphis gossypii (26.6 per 3 leaves). Henosepilachna vigintioctopunctata [Epilachna vigintioctopunctata], Myllocerus spp., Amrasca devastans [A. biguttula biguttula] and Bemisia tabaci were not observed on aubergine intercropped with cluster bean. The population densities of coccinellids, syrphids and spiders were high in aubergine intercropped with cluster bean (4.3, 3.1 and 1.9 per plant) compared to aubergine as a pure crop. The highest cost benefit ratio (1:2.70) was recorded or aubergine + cluster bean intercropping system (1:1.62 in aubergine as a pure crop).
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