International Journal of Plant Protection

P. Mahalakshmi ¹, I. Yesuraja ²

Affiliations
1 Department of Plant Pathology, Agricultural College and Research Institute, Madhurai T.N.
2 Department of Plant Pathology, Agricultural College and Research Institute, Madhurai T.N., IN

Abstract

Studies were conducted to test the effect of oil cakes and organic manures on the growth of wilt pathogen under in vitro conditions. The extracts of different oil cakes and organic manures were tested against F.oxysporum f.sp.dianthi by poisoned food technique in in vitro. Least growth of pathogen was recorded in extracts of neem cake showing excellent inhibitory effect of 80.44 per cent reduction over control. Next best in order of merit was Mahua cake (75.11%) followed by neem seed kernel extract (60%) and pungam cake (38.22%) and least by others. Among the organic manures tested, vermicompost and composted coir pith showed maximum growth inhibition of 37.56 and 36.55 per cent over control, respectively.

Keywords

Carnation Wilt, Fusarium Oxysporum F.sp.dianthi, Oil Cakes, Organic Manures

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I. Yesu Raja ¹, P. Mahalakshmi ²

Affiliations
1 Department of Plant Pathology, Agricultural College and Research Institute, Madhurai T.N.
2 Department of Plant Pathology, Agricultural College and Research Institute, Madhurai T.N., IN

Abstract

In the field trial conducted during Kharif season, spraying at booting stage (85DAS) and 15 days later with carbendazim (500 g/ha) + phosphamidon (1 lit./ha) was the most effective in reducing sheath rot disease incidence, besides giving the maximum yield. Among the plant products and antagonists, neem oil (3%) spray had the maximum efficacy in reducing the disease incidence followed by neem seed kernel extract (5%), Pseudomonas fluorescens (1 kg/ha), Bacillus subtilis (1 kg/ha), leaf extracts (10%) of Acalypha indica , Convolvulus arvensis and in the Rabi season experiment also, the same trend was observed. The maximum cost benefit ratio was recorded in P. fluorescens sprayed plots.

Keywords

Rice Sheath Rot, Integrated Management, Sarocladium Oryzae

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