alexa IMPACT OF CERTAIN AGROCHEMICALS ON THE POPULATION OF COCCINELLID BEETLES (COLEOPTERA: COCCINELLIDAE) IN BHENDI (ABELMOSCHUS ESCULENTUS (L.) MOENCH) ECOSYSTEM


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Review Article

IMPACT OF CERTAIN AGROCHEMICALS ON THE POPULATION OF COCCINELLID BEETLES (COLEOPTERA: COCCINELLIDAE) IN BHENDI (ABELMOSCHUS ESCULENTUS (L.) MOENCH) ECOSYSTEM

Ardhendu Chakraborty3*, K. Kumar1 and D. J. Pal2
  1. Department of Entomology, Pandit Jawaharlal Nehru College of Agriculture and Research Institute, Karaikal, U.T.of Puducherry- 609 603, India
  2. Department of Agriculture, Govt. of Tripura, State Biocontrol Production Centre, Agartala, Tripura-799003, India.
  3. Department of Agricultural Entomology, PGP College of Agricultural Sciences, NH-7, Namakkal-637207, Tamil Nadu, India
Corresponding Author: Ardhendu Chakraborty, Department of Agricultural Entomology, PGP College of Agricultural Sciences, NH-7, Namakkal-637207, Tamil Nadu, India,E-mail: [email protected]
Received: 04 February 2014 Accepted: 28 February 2014
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Abstract

Two supervised field experiments were conducted in the bhendi hybrid MH 10 during kharif, 2012 and rabi, 2012-13 to study the impact of agrochemicals on coccinellid population. The agrochemicals used were fertilizer, insecticide and herbicide individually as well as in combinations. It was found that the population of coccinellids was higher in the untreated check (0.20 to 1.13/plant) while a low population was recorded in the treatment with herbicide + insecticide which ranged from 0.03 to 0.33/plant during kharif, 2012. In rabi, 2012-13, a higher population was recorded in the untreated check (0.16 to 1.06/plant) while a low population was observed in the treatment with herbicide + insecticide (0.06 to 0.50/plant). It was also found that, the population was higher in the treatment with fertilizer alone (0.47 and 0.50/plant in kharif and rabi respectively) compared to the other treatments.

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