21 Kas 2024 Perşembe
Bionomics and fertility life table of the yellow mite, Polyphagotarsonemus latus (Banks) (Acari: Tarsonemidae) in jute (Corchorus olitorius L.) at different temperature-humidity
Abstract :The jute yellow mite Polyphagotarsonemus latus constitutes one of the major pests of jute crop in Bangladesh. The objective of this work was to study the bioecology of the P. latus, to determine its temperature-humidity responces and its fertility life table in jute (Corchorus olitorius L.) var. O-9897. The incubation period of yellow mite on the variety O-9897 was 2.17 days for female and 1.98 days for male; larval period of 0.95 days for female and 0.80 days for male; Pupal period of 0.81 days for female and 0.70 days for male and egg to adult stage being 3.93 days for female and 3.48 days for male were highest in the 1st generation with temperature at 24.92 ¡¾ 0.27 ¨¬C & 46.78 ¡¾ 1.28 % relative humidity among three generations. After a pre-oviposition period of 0.99 days, the females deposited 2.30 eggs per day during 13 days, i.e., 29.86 eggs per female at similar condition in 1st generation. The highest longevity was observed 14.35 days for females in the 1st generation with temperature at 24.92¡ÆC ¡¾ 0.27¡ÆC & 46.78 ¡¾ 1.28% and 10.44 days for males in the 2nd generation with temperature at 28.51 ¡¾ 0.26¡ÆC and 66.65 ¡¾ 1.27% relative humidity. In 2nd generation the intrinsic rate of increase (rm) was highest (0.389); finite rate of increase (¥ë) was 1.48 individuals per female per day in 2nd generation. The mean generation time (T) was greater in first generation (8.12) and net reproductive rate (Ro) was observed 14.12 in second generation
Jute, Tarsonemid, Polyphagotarsonemus latus, bioecology, life table of fertility