Volume 6 | Issue - 16
Volume 6 | Issue - 16
Volume 6 | Issue - 16
Volume 6 | Issue - 16
Volume 6 | Issue - 16
An investigation on “Construction age specific survival and fertility life-tables of Rice Brown Plant Hopper (Nilaparvata lugens Stal.) under natural condition” was carried out at White Grub Project Research Laboratory, Department of Entomology, Sardar Vallabhbhai Patel University of Agriculture and Technology, Meerut (U.P.) during Kharif 2017. Three types of life-tables viz. age specific, stage specific and age specific survival and fertility life-tables were constructed during the investigation. Age specific life -table was revealed that the Nilaparvata lugens Stal. was completed its generation in 30 days on Pusa Basmati-1, while it was completed generation in 29 days on Pant Dhan-12. Population growth was estimated from the fertility lifetable using the parameters potential fecundity (Pf) 85.88, net reproductive rate (R0) 24.46, Intrinsic rate of increase (rm)0.1276, mean length of generation (Tc) 25.05, doubling time (DT) 54.432 and finite rate of increase (λ) 1.1372 was recorded on Pusa Basmati-1, while the data was observed on Pant Dhan-12, the fecundity (Pf) 85.48, net reproductive rate (R0) 24.07, intrinsic rate of increase (rm) 0.1278, mean length of generation (Tc) 24.89, doubling time (DT) 5.4236 and finite rate of increase (λ) 1.1372. The finite rate of increase was 1.1372 was observed on Pusa Basmati-1 and Pant Dhan-12