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Middle-East Journal of Scientific Research
Vol. 23 (3), 2015, Pages: 421-425

Evaluation of Different Bio Pesticides Against the Aphid in okra at Bhubaneswar

Mohanisha Janghel, Ipsita Mishra and B.K. Mishra

Department of Entomology, College of Agriculture, Orrisa University of Agriculture and Technology, Bhubaneswar - 751003 (Odisha), India.

Abstract

Aphid population ranged from 2.01- 2.21 in the beginning of Kharif 2013 and 3.87 to 4.21 in summer 2013-14 after the application of biopesticides and bioagents at 40 DAG aphid infestation during 2013 was found to be 0.36/plant in acetamiprid treatment (T7) but bioagent C. zastrowi sillemi also reduced the population substantially recording 1.0 and 1.09 aphid/ plant at 40 DAG. The reduction was 96.54% in insecticide were as it was 90.41% in C. zastrowi sillemi @ 1 lakh / ha and 89.54% in C. zastrowi sillemi @ 75,000 / ha indicating the effectiveness of C.zastrowi sillemi in the control of sucking pest similarly corresponding incidence in summer was 0.96, 1.28 and 1.31 aphids/ plant and 92.29 and 86.32 and 85.74% reduction respectively. The biopesticides were also effective for control of aphid the most effective being V.lecanii which recorded 1.86 and 2.06 aphids/plant and 82.16 and 82.92% reduction of aphid population during Kharif and summer respectively. The other biopesticides in order of effectiveness were M. anisopliae, Neemazol and B.bassiana recording (3.02 and 3.10, 4.01 and 3.92, 3.96 and 4.08 aphid/plant) during Kharif and summer respectively. It was observed that over the two seasons, the aphid population ranged between 0.77 in acetamiprid treatment to 3.69 in B.bassiana treatment among the bioagent and biopesticides where as in controlled plot it was 8.34 aphid/plant correspondingly the population reduction was also highest in T7 (80.21%) followed by T3 (79.46%), T5 (77.57%), T2 (67.86%), T4 (60.67%) and T1(55.75%) indicating that C.zastrowi sillemi and V.lecanii were most effective bioagents against aphids.

Keywords: Evaluation, Aphid, Okra.

 
 
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