Author(s):

Subhash Chandra, NK Rajvanshi, Ajay Kumar and Pankaj Kumar

Abstract: Lentil is an important pulse crop and plays very important role in the supply of the protein to under nourished vegetarian population of the country. <em>Fusarium </em>wilt of lentil caused by <em>Fusarium oxysporum</em> f. sp<em>. lentis</em> is one of the wide spread and destructive diseases in India under rice-based cropping system. Use of synthetic fungicides has led to the emergence of several problems like environment pollution, residual effect in grains and killing of non-target organism(s). Hence, for minimizing the losses caused by <em>Fusarium</em> wilt, four plant extracts such as Garlic, Neem, Eucalyptus, Tulsi and three antagonistic bio-agents<em> viz</em>. <em>Trichoderma viride, Trichoderma harzianum </em>and<em> Pseudomonas fluorescence</em> were evaluated. The disease incidence was not much reducing by Neem (40.50 %) and Tulsi (34.45 %) at 10 per cent concentration of 60 days after sowing. The same trends were also found in per cent disease reduction. However, per cent disease reduction in between Eucalyptus (25.50 %) and Garlic (28.00 %), Tulsi (34.45 %) was at par to each other. The Maximum per cent disease reduction was found in Eucalyptus (25.50 %) and Garlic (28.00 %), Lowering the disease incidence and higher per cent disease reduction was also found in <em>Trichoderma viride</em> (19.64 %) as compared to <em>Trichoderma harzianum</em> (35.50 %) and <em>Pseudomonas fluorescence</em> (28.43 %) at 10 per cent concentration of 60 days after sowing.

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