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Effect of weather parameters on disease incidence of summer paddy varieties: Indrayani and Phule Samruddhi

The present investigation entitled “Effect of weather parameters on disease incidence of summer paddy varieties” was carried out during summer, 2014 at Agricultural Research Station farm, Vadgaon Maval, Tal- Maval, Dist- Pune. The field experiment was laid out in a split plot design with three replications. There were Eight treatment combinations comprising of two varieties VDN-3-51-18 (Indrayani), VDN-99-29 (Phule Samruddhi as main plot treatments and four fertilizer levels (F1-75% RDF through straight fertilizers, F2-100% RDF through straight fertilizers, F3-125% RDF through straight fertilizers and F4-RDF through Urea DAP form(57:29:00)+50 KgK2O )as sub plot treatments. The gross and net plot size were 2.95 m x 2.95 m and 2.55 m x 2.55 m, respectively. A spacing of 15-25 cm x 15-25 cm was adopted. Disease incidence and per cent disease intensity was lower with VDN-99-29 (Phule Samruddhi) followed by VDN-3-51-18 (Indrayani). Disease incidence and per cent disease intensity was more with fertilizer levels of 75% RDF through straight fertilizers and lower with fertilizer through Urea DAP briquette form (57:29:00)+50KgK2O. There was positive correlation between maximum temperature, morning relative humidity, BSS and canopy temperature and incidence of sheath rot and scald but negative correlation with minimum temperature, evening relative humidity, growing degree day and Rust incidence was not observed during the period of investigation.