Vol. 10, Special Issue 6 (2021)

Author(s):
Arudra Srinivasarao, Tapan Kumar Khura, Roaf Ahmad Parray, HL Kushwaha, Indra Mani and Susheel Kumar Sarkar

Abstract:
Application of pesticide in recommended dose not only reduces the input cost of chemical but also reduces the ill effects due to excess application of pesticide on crop and environment. A tractor operated swinging lance sprayer developed for effective application of chemicals. To standardize optimum operational parameters for developed sprayer, the effect of various factors at different levels need to investigate through experimentation. The optimum combination of operational parameters for effective spraying is spacing at 3.2m, spray gun height at 1.2m, swing angle 120⁰ and operating pressure at 300PSI. The application rates of sprayer was 784L/ha, 604L/ha and 501L/ha at operating speeds of 0.75m/s, 1.0m/s and 1.25m/s respectively. CV in droplet size, droplet density, percent cover, volume of spray and relative span for top leafs was 4.14, 6.89, 5.56, 8.47 and 3.91 respectively, where as CV in droplet size, droplet density, percent cover, volume of spray and relative span for bottom leafs 6.89, 2.40, 5.99, 3.24 and 2.45 respectively. The theoretical field capacity of sprayer was 2.61ha/h, 3.48ha/h and 4.35ha/h at operating speeds of 0.75m/s, 1.0m/s and 1.25m/s respectively. Where as effective field capacity of sprayer were 2.0ha/h, 2.43ha/h and 2.66ha/h at operating speeds of 0.75m/s, 1.0m/s and 1.25m/s respectively. The bio-efficiency of sprayer to control pod bug in green gram filed was 68.6% and 88.45% at 3DAS and 5DAS respectively. The overall field efficiency of sprayer was 77%, 70% and 621% at operating speeds of 0.75m/s, 1.0m/s and 1.25m/s respectively.