Population dynamics of insect pest and natural enemies of castor (Ricinus communis L.) under different intercrops
POPULATION DYNAMICS OF INSECT PEST AND NATURAL ENEMIES OF CASTOR UNDER INTERCROPS
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Authors
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M SENTHIL KUMAR
Tapioca and Castor Research Station, Tamil Nadu Agricultural University, Yethapur-636 119, Tamil Nadu
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P DURAIMURUGAN
Tapioca and Castor Research Station, Tamil Nadu Agricultural University, Yethapur-636 119, Tamil Nadu
Keywords:
Castor, Intercropping, Insect pest, Natural enemies, Population dynamicsAbstract
A field experiment was conducted at Tapioca and Castor Research Station, Tamil Nadu Agricultural University, Yethapur, Tamil Nadu during kharif 2015 and rabi 2016 to study the population dynamics ofinsect pests and natural enemies in different castor intercrops. The defoliators population was significantly lesser in castor + red gram+ pearl millet intercropped treatments than in the sole castor crop, which served as a control. The cumulative mean number of sucking pest population was found to be lesser in (castor + red gram), followed by castor + red gram + pearl millet intercrop system. Capsule borer percentage infestation is significantly lesser in castor + red gram + pearl millet intercropped treatments with increased percentage parasitization byMicropliti macullipennis and Apanteles angaleti.
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References
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