Integrated disease management of stalk rot of cauliflower
Stalk rot of cauliflower (S. sclerotiorum) is an important disease in India. Since very little information is available on its management, investigations were made to study various aspects of integrated disease management. The maximum reduction in disease incidence to 9.7% was recorded with 1.5 g/l bavistin 50% followed by 15.3% with 5.25g/l sailaxyl-MZ 72%, 16.7% with 8.34g/l mancozeb 75%, 20.8% with 1.08g/l topsin-M 70% and 34.7% with 6 ml/l neem extract 25%. The above fungicides also reduced disease index. Bavistin 50% also gave highest seed yield. Among bioagents, culture filtrate of Trichoderma harzianum was most effective in reducing disease incidence to 23.6% as compared to A. niger, kalisena or booty .The seed production was increased to 200.8 kg/ha in 2000 and 322.7 kg/ha 2001 after treatment with T. harzianum. The application of A. niger (194.1, 314.8 kg/ha), Kalisena (192.2, 308.5 kg/ha), T. harzianum + A. niger (190.8, 302 kg/ha) Booty + Kalisena (186.3, 297 kg/ha) and Booty (165.4, 258.5 kg/ha) also increased seed production. Intercropping with one and two rows of garlic reduced disease index significantly over control in first cropping season. However, intercropping with one and two rows of onion reduced disease index significantly in second season.
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