0729 Influence of SRI on the Incidence of Insect Pests
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Presenter: T. Ratna Sudhakar and P. Narsimha Reddy ANGRAU, Hyderabad Institution: ANGRAU Audience: 2nd National SRI Symposium, Agartala, India Subject Country: India
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0729 Influence of SRI on the Incidence of Insect Pests
- 5. RESULTS Occurrence of insect pests with SRI & normal methods Contd… Stage Normal SRI Nursery Thrips Thrips Hispa Stem borer Gall midge Whorl maggot Total: 5 1
- 8. Stage Normal SRI Main field Whorl maggot Whorl maggot Hispa Hispa Thrips Thrips Stem borer Stem borer Gall midge Gall midge Leaf folder Leaf folder Cut worms Cut worms Rodents (veg. stage) - Rodents (reproductive stage) Rodents (reproduc-tive stage) 9 8 Total 14 9
- 13. Incidence of early-stage insect pests Particulars DAT Normal SRI Whorl maggot-damaged leaves (%) 24 2.0 4.4 Hispa-damaged leaves (%) 24 7.3 4.2 Thrips-damaged leaves (%) 24 31.6 19.9
- 14. Incidence of stem borer Season Particulars DAT Normal SRI Kharif – 2006 Dead hearts (%) 37 2.1 0.5 - do - 53 4.9 1.9 - do - 68 6.2 6.0 White ears (%) 135 11.7 3.5 Total 24.9 11.9 Mean 6.2 2.9 Rabi 2005-06 Dead hearts (%) 55 28.1 22.8 White ears (%) 86 33.6 10.4 Total 61.7 33.2 Mean 30.8 16.6
- 15. Incidence of gall midge (%) Season Particulars Time Normal SRI Kharif – 2006 Silver shoots 53 0.3 0.4 - do - - do - 68 0.5 1.3 Total 0.8 1.7 Mean 0.4 0.8
- 16. Grain yield (t/ha) * Low yield due to cold injury Season Normal SRI Kharif 2006 * 0.21 4.16 Rabi 2005-06 2.25 3.47
- 17. Meteorological data & sowing time particulars. Meteorological data + Sudden drop in min. temp. between 16 th – 21 st Dec.-06 (9.2 to 9.8 0 C for 5 days ) Particulars Normal SRI Date of sowing 11-8-2006 11-8-2006 Date of planting 11-9-2006 25-8-2006 Date of harvesting 8-1-2007 8-1-2007 Period Mean max. 0 C Mean min. 0 C No. of sunshine hours 1 st – 15 th Nov-06 27.7 19.2 4.9 16 th – 30 th Nov-06 29.6 17.9 7.5 1 st – 15 th Dec-06 29.1 14.6 8.6 16 th – 31 st Dec-06 28.1 12.2 + 8.6
- 21. Thank you