Pest management of Paddy cultivation Rice crop is attacked by large number of insect-pests and diseases and usually 20-30% losses are attributed to pest attack. Use of resistant varieties and use of healthy seed stock is the best and most effective way of preventing the pests and diseases. Crop rotation with legumes and other green manure crops also help in keeping the pest problem below economic threshold level. Use of pest predators such as Trichogramma (50,000 eggs/ha), Chrysoperla (5000 eggs/ha) etc have also been found to be keeping large number of insect-pests below ETL. Important insect-pests affecting the rice (stagewise) STAGE POSSIBLE STAGE Seedling Rice whorl maggot; Thrips; Defoliator; Stem borer; Green leaf hopper; Plant hopper Tillering Thirps; Defoliator, Stem borer; Green leaf hopper; plant hopper Minor pests (vegetative phase): Aphids, caseworm, black bugs, grasshoppers, mealy bugs Stem elongation Defoliator; Stem borer; Greenleaf hopper; Plant hopper Panicle initiation to booting Stem borer; Green leaf hopper; Plant hopper Heading Plant hopper Flowering Plant hopper; Thrips Minor pests (reproductive phase): Green horned caterpillars, skippers Mature grain stage Plant hopper; Rice bug Minor pests (reproductive phase): Panicle mite Control measures For leaf eating caterpillars 5 to 10% Dashaparni extract in water as foliar spray Ginger, Chili, Garlic extract (Crush garlic 10 kg, ginger 5 kg and green chilly 5 kg in 70 liter of water and filter). 60 liter of extract is needed for spraying in 1 ha. Vermiwash 7 to 10% in water as foliar spray. Leaf folder control - Ginger, Garlic, Chili extract. In addition, use of light trap is also very effective in control of wide variety of pests. Following combination of fermented botanical extracts have also been found to be very effective for control of various insect-pests. After 45 days of transplanting apply cow-dung-cow urine and Neem leaf extract as foliar spray (This extract can be prepared by suspending 2lit cow urine, 1 kg cow dung, 2 kg crushed Neem leaves in 100 lit water. Ferment the suspension for 2 days with frequent stirring. Filter and spray) After 60 days of transplantation apply concentrated fermented extract (Cow urine 5lit, cow dung 2kg, Neem leaves 5kg, fermented for 2 days, filter). After 75 days of transplantation spray 3% sour butter milk (3 lit sour butter milk in 100 lit water, keep it overnight). Shantanu Kumar
Posted on: Fri, 28 Jun 2013 10:45:08 +0000
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