Presenter: T. Ratna Sudhakar and P. Narsimha Reddy ANGRAU, Hyderabad
Institution: ANGRAU
Audience: 2nd National SRI Symposium, Agartala, India
Subject Country: India
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
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