2019 Vol.25 No.1 PP 31-33

Bioefficacy of plant extracts against mustard aphid and their natural enemies

Narendra Singh, N. S. Bhadauria and ^*Pradyumn Singh

Department of Entomology,
College of Agriculture,
R.V.S. Krishi Vishwavidyalaya,
GWALIOR (M.P.) 474002, INDIA
*Corresponding Author Email : dtpmasters@yahoo.co.in

ABSTRACT

The Bio-efficacy of eleven plant extracts namely viz.Neem Kernel; Rhizome of Ginger; Leaves of Datura, Gajarghas, Harsingar, Oak and Latjeera; Bulb of Garlic and Onion; Flowers of Chrysenthemum and Fruits of Chilli in the concentration of 5 percent and imidacloprid @ 40 g ai/ha was tested against mustard aphid, Lipaphiserysimi and their effect on D. rapae and Coccinellid beetle were tested in the Department of Entomology, College of Agriculture, Gwalior (M.P.). All the tested plant materials and imidacloprid @ 40 g ai/ha were effective significanty in reducing the aphid population over control.The aphid population in treated plots ranged from 7.2 to 40.0 as against 85.4 aphid/twig in untreated control. Among the plant material, three sprays of Neem Kernel were found most effective followed by three sprays of chilli fruits.All the plant extracts were found significantly safer to D. rapae and coccinellid bettle in comparision to insecticide (imidacloprid).

Key words : Coccinellid beetle, Diaeretiellarapae, Lipaphiserisimi, Mustard Aphid, Plant extracts.