Journal of Horticultural Sciences

G. Bindu Madhavi ¹, S. L. Bhattiprolu ¹, V. Bali Reddy ¹

Affiliations
1 Regional Agricultural Research Station, Lam, Guntur - 522 034, IN

Abstract

Eight different plant extracts were evaluated in vitro against Sclerotium rolfsii causing dry ischolar_main rot in chillies. Among these, leaf extract of neem (Azadirachta indica) caused maximum inhibition of mycelial growth (80.74%), followed by periwinkle Vinca rosea (78.8%) and bottlebrush (Callistemon, 74.8%) respectively. Sclerotial production was inhibited to an extent of 11% and the inhibition caused was maximum with neem extract, followed by Polyalthia longifolia and V. rosea extracts. Though sclerotial germination was inhibited by 30% to 95% in various treatments, the most effective treatment was that of neem leaf extract (95%), followed by ginger extract (92%).

Keywords

Sclerotium rolfsii, Plant Extracts, Mycelial Growth, Sclerotial Production.

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G. Bindu Madhavi ¹, S. L. Bhattiprolu ¹, V. Bali Reddy ¹

Affiliations
1 Regional Agricultural Research Station, Lam, Guntur -522 034, IN

Abstract

Compatibility of Trichoderma viride with 25 pesticides was evaluated in vitro. Among six seed-treatment chemicals tested, T. viride showed a high compatibility with the insecticide Imidacloprid (7.6cm mycelial growth), followed by Mancozeb (6.3cm) and Tebuconazole (3.7cm). Contact fungicides, viz., Pencycuron and Propineb were found to be fully compatible with T. viride. Among the 10 herbicides also tested, the fungus was highly compatible with Imazathafir (9.0cm) followed by 2,4-D Sodium salt (8.9cm) and Oxyfluoforen (6.5cm) while being totally incompatible with systemic fungicides like Carbendazim, Hexaconazole, Tebuconazole and Propiconazole.

Keywords

Trichoderma viride, Compatibility, Pesticides.

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