Vol. 2 (5) : September-October 2011 issue
Green Farming Vol. 2 (5) : 563-566 (September-October, 2011) (New Series)
In vitro evaluation of different fungicides, plant extracts and bio-agents against Alternaria alternata causing leaf blight of cowpea (Vigna unguiculata)
D.S. THAWARE1*, P.A. FUGRO2, Y.T. JADHAV3, S.V. MAGAR4 and R.A. KARANDE5
Department of Plant Pathology, College of Agriculture (Dr. Balasaheb Sawant Konkan Krishi Vidyapeeth), Dapoli, Dist. Ratnagiri, Dapoli - 415 712 (M.S.)
Designation : 1Professor *(sanju.6771@rediffmail.com), 2Associate Professor, 4Ph.D. Scholar
Subject : Plant Pathology, Nematology and Virology, Mushroom Cultivation
Paper No. :
Total Pages : 4
Received :
Revised accepted :
Get Access
Citation :
D.S. THAWARE, P.A. FUGRO, Y.T. JADHAV, S.V. MAGAR and R.A. KARANDE. 2011. In vitro evaluation of different fungicides, plant extracts and bio-agents against Alternaria alternata causing leaf blight of cowpea (Vigna unguiculata). Green Farming Vol. 2 (5) : 563-566 (September-October, 2011) (New Series)
ABSTRACT
The pathogenic fungus was isolated on PDA medium. The colony of Alternaria alternata was circular, grayish black with whitish growth on the upper surface on PDA with profuse growth and sporulation. Among different fungicides tested in vitro, mancozeb (0.2 per cent) and propiconazole (0.05 per cent) completely inhibited the growth of the test fungus. In vitro screening of the plant extracts revealed that the bulb extract of garlic (Allium sativum) was most effective in inhibiting the growth of the test fungus followed by sadaphuli and glyricidia. The antagonistic effect of the fungal bioagents against A. alternata revealed that Trichoderma harzianum and T. viride significantly inhibited the mycelial growth of the test fungus.
Key words :
Alternaria alternata, bioagents, cowpea, leaf blight, plant extracts, Trichoderma, Vigna unguiculata.