1. Use resistant varieties
2. At seedbed and transplanting, handpick and destroy egg masses
3. Raise level of irrigation water periodically to submerge the eggs deposited on the lower parts of the plant
4. Before transplanting, cut the leaf-top to reduce carry-over of eggs from the seedbed to the field
5. Ensure proper timing of planting and synchronous planting, harvest crops at ground level to remove the larvae in stubble, remove stubble and volunteer rice, plow and flood the field
6. Encourage biological control agents: braconid, eulophid, mymarid, scelionid, chalcid, pteromalid and trichogrammatid wasps, ants, lady beetles, staphylinid beetles, gryllid, green meadow grasshopper, and mirid, phorid and platystomatid flies, bethylid, braconid, elasmid, eulophid, eurytomid and ichneumonid wasps, carabid and lady bird beetles, chloropid fly, gerrid and pentatomid bugs, ants, and mites, earwigs, bird, asilid fly, vespid wasp, dragonflies, damselflies, and spiders
Bacteria and fungi also infect the larvae: mermithid nematode, chalcid, elasmid and eulophid
7. Apply nitrogen fertilizer in split following the recommended rate and time of application.
সার্চ করুন
উত্তর সমূহ
1. Use resistant varieties 2. At seedbed and transplanting, handpick and destroy egg masses 3. Raise level of irrigation water periodically to submerge the eggs deposited on the lower parts of the plant 4. Before transplanting, cut the leaf-top to reduce carry-over of eggs from the seedbed to the field 5. Ensure proper timing of planting and synchronous planting, harvest crops at ground level to remove the larvae in stubble, remove stubble and volunteer rice, plow and flood the field 6. Encourage biological control agents: braconid, eulophid, mymarid, scelionid, chalcid, pteromalid and trichogrammatid wasps, ants, lady beetles, staphylinid beetles, gryllid, green meadow grasshopper, and mirid, phorid and platystomatid flies, bethylid, braconid, elasmid, eulophid, eurytomid and ichneumonid wasps, carabid and lady bird beetles, chloropid fly, gerrid and pentatomid bugs, ants, and mites, earwigs, bird, asilid fly, vespid wasp, dragonflies, damselflies, and spiders Bacteria and fungi also infect the larvae: mermithid nematode, chalcid, elasmid and eulophid 7. Apply nitrogen fertilizer in split following the recommended rate and time of application.
উত্তর দিন