Effect of plant density on the population of mango hopper.
Rahman S. M. A., Gajendra Singh, Kuldeep, Singh V. P.
Author Affiliation: Department of Entomology, G.B.P. Uni. of Agric. and Tech., Pantnagar - 263 145 (Uttranchal), India.
Progressive Research 2 :185
Abstract : Mango (cv. Dasheri) orchards planted at four different spacings (5.0×5.0, 7.5×7.5, 10.0×10.0 and 12.5×12.5 m) in Uttaranchal, India, were studied to determine the effect of plant density on mango hopper (Amritodus atkinsoni, Idioscopus clypealis and Idioscopus niveosparsus) population in 2001. The hopper population on panicles on the 10th standard week in 2001 presented was maximum (8.62 hoppers per panicle) on 5.0×5.0 m plant density which was significantly different from other treatments. The lowest hopper population (5.09 hoppers per panicle) was recorded on 12.5×12.5 m plant densities that was significantly different from other treatments. Hopper population recorded on the 12th standard week was maximum (10.52 hoppers per panicle) on the 5.0×5.0 m plant density, which was significantly different from other treatments. The minimum (6.18 hoppers per panicle) was found on 12.5×12.5 m plant density followed by 7.61 and 7.56 hoppers per panicle on 7.5×7.5 m and 10.0×10.0 m plant densities, which were at par.