Thrips, Aphids, Mites and Fruit Borers
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Detailed description of pest of Chili and their management
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Thrips, Aphids, Mites and Fruit Borers
- 2. 1.Thrips •S.N. - Scirtothrips dorsalis Thrips tabaci. •Family - Tripidae •Order - Thysonoptera
- 3. Economical importance •Damage percentage - 30-50% •Also responsible for transmitting leaf curl disease •Host plant- •Onion ,Brinjal, Okra, Cotton, Mango, Bottle Gourd ,Guava
- 4. Mark of Identification •Adult •Minute ,delicate insect less than 1 mm . •Yellow in color . •Wings are fringed with hair •Nymph •More minute and wingless .
- 5. Thrips
- 6. Life history •Both the sexual and parthenogenesis reproduction is occur •Eggs - inside the leaf tissues or lower side of the leaf . •Larva - 4-6 days. •Pupa - in soil. •Adult - 2-3 days. •The pest active dry days •
- 7. Life cycle
- 8. Nature of damage •The thrips scrap the epidermis of leaves and suck the oozing sap . •The damaged plant tissues initially become whitish ,later brown ,ultimately dry. •As result leaves curl ,and become small . •Such symptoms known as Murda or Bokdya .
- 9. Chilli leaf curl- Murda
- 10. Management • Spray 0.2% phosphomidon •Spray 0.03% dimethoate •Seed treatment with imidacloprid @ 3 -5 g/kg of seed. •Foliar spraying with carbaryl 3g/l or phosalone 3ml/l or acephate 1 g/l •Application of fipronil 0.3G 8 kg/acre at 15 and 45 days after transplanting.
- 11. 2.Aphids • S.N. - Aphis gossypii, Myzus persicae • Family - Aphididae • Order - Hemiptera
- 12. Aphid
- 13. Nature of damage . •Nymphs and adults suck the sap from the leaves •The affected plants turn yellow, get deformed and dry away • Aphids also secrete honeydew on which sooty mould grows, which hampers the photosynthetic activity.
- 14. Control Measures. • Seed treatment with imidachloprid • Thiamethoxam 5 kg/seed • Use of yellow sticky trap.
- 15. 3.Mite • S.N. - Tetranychus spp • Family - Tetranychidae • Order - Acarina
- 16. Mite
- 17. Nature of damage . • They suck the cell sap from leaves . •As result leaves wither and turn yellowish.
- 18. Control Measures. • Spray with 0.2 % Sulphur • Dusting with Sulphur @ 20 -25 kg /ha . • Spray with 0.03 % dicofol or abamectin @ 150 ml /ha .
- 19. 4.Fruit borer • S.N. - Helicoverpa armigera Spodoptera litura • Family - Noctuide • Order - Lepidoptera
- 20. Management •Deep summer ploughing. •Monitoring with pheromone traps @ 4/acre • Raising trap crops like castor (S. litura ), marigold (H. armigera) •Spraying with SNPV/ HaNPV at 250LE/ acre in the evening. • Spray diflubenzuron 1.0 g/l controls just hatched larvae. • Foliar spraying of thiodicarb 1.0 g/l or acephate 1.5 g/l or