Assessment of Post Emergence Herbicide Efficacy for Drone Spraying in Transplanted Rice (Oryza sativa L.)

A field experiment was conducted at Rice Research Centre, Agriculture Research Institute, Rajendranagar, Hyderabad during kharif, (2022) to assess the post emergence herbicide efficacy for drone spraying in transplanted rice (Oryza sativa L.). The experiment was laid out in randomized block design with 7 treatments and replicated thrice. Results revealed that among different doses of herbicidal treatments, post emergence application of penoxsulam 1.02% + cyhalofop-butyl 5.1% OD @ 180 g a.i ha-1using drone recorded highest number of tillers at harvest, plant height at harvest, number of panicles at harvest, grain yield and low weed dry matter at 60 DAT. It was statistically on par with application of penoxsulam 1.02% + cyhalofop-butyl 5.1% OD @ 120 g a.i ha-1 using knapsack sprayer, application of penoxsulam 1.02% + cyhalofop-butyl 5.1% OD @ 150 g a.i ha-1 using drone, and application of penoxsulam 1.02% + cyhalofop-butyl 5.1% OD @ 120 g a.i ha-1 using drone followed by application of penoxsulam 1.02% + cyhalofop-butyl 5.1% OD @ 90 g a.i ha-1 using drone followed by unweeded control.

Influence of Phosphorus and Sulphur Application on Sesame Yield in High P Soils of Telangana, India

The present study in pot experiments was conducted on “Influence of phosphorus and sulphur application on sesame yield in high P soils of Telangana”. The experiment was conducted in two different levels of high phosphorus status soils with 67.29 kg P2O5 ha-1 in soil 1 (S1) and 83.46 kg P2O5 ha-1 in soil 2 (S2). The treatments were taken in factorial completely randomized design in combination of five levels of phosphorus (P0-0, P25- 5, P50-10,P75-15 and P100-20 kg ha-1 of soil) four levels of sulphur (S0-0,S1-10,S2-20 and S3-30 kg ha-1 of soil). A significant increase in seed yield of sesame crop could be achieved by combined application of P75 (15 kg P2O5 ha-1) + S20 (20 kg S ha-1) in high available phosphorus soils. Among the various treatments tested within two high P soils, in S1 maximum seed (11.89 g pot-1) and stalk yield (21.98 g pot-1) was obtained with combined application of P75 (15 kg P2O5 ha-1) + S20 (20 kg S ha-1) while in S2 maximum seed (11.92 g pot-1) and stalk yield (21.89 g pot-1) was obtained with combined application of P50 (10 kg P2O5 ha-1) + S20 (20 kg S ha-1).