Biology of Soybean Jassid, Empoasca Kerri (Pruthi)

A laboratory experiment was conducted to study the biology of soybean jassid during August to October, 2008. The average room temperature during the study was 25.50 ± 2.90, while relative humidity was 67.80 ± 8.45. The life-span comprising of egg period of 5.96 ± 1.13 days, nymphal period of 14.12 ± 1.78 days with 5 instars, adult period of 9.52 ± 0.58 days in male and 11.4 ± 0.86 days in female with pre-oviposition period of 3.44 ± 0.71 days, oviposition period of 4.16 ± 0.8 days and post-oviposition period of 3.16 ± 0.89 days. Thus, the entire life span completed in an average of 27.84 ± 3.07 in male, while, 31.32 ± 3.62 days in female. The average egg laying capacity was 16.28 ± 2.65 eggs per female. The sex ratio of male:female was 1:1.18 under laboratory conditions.