روي خربزه ، خيار چنبر و باميه در شرايط آزمايشگاهي TABACI )GENN( )HAM, ALEYRODIDAE( BEMISIA بررسي مقايسه اي دوره رشد مراحل پيش از بلوغ سفيد با لك پنبه

A Comparative Study on the Preimaginal Developmental Time of Sweetpotato Whitefly Bemisia Tabaci Gen. ( Horn., Aleyrodidae) on Melon, Cucumber and Okra under Laboratory Conditions

A study of Preimaginal development of sweet potato whitefly Bemisia tabaci Genn. (Horn., Aleyrodidae) was done on melon, cucumber and okra under laboratory conditions (15±1, 25+1, 30+1 °C, R.H. 60+5% and a photoperiod of L:D 14:10 hours). The results showed that total preimaginal development period on melon was 51.51, 21.42 and 15.7 days at 15, 25 and 30°C, respectively. On cucumber and okra this rate was 51.97, 20.99, 13,42 and 66.7, 32,13 and 17.02 days, respectively. Data analysis showed that there was a significant difference in preimaginal development of this pest on melon, cucumber and okra. There was also a significant difference among preimaginal development on melon , cucumber and okra at 15°C. Further There was a significant difference between developmental stages of time egg and nymphal stages on okra, melon and cucumber but no significant difference was obserred at pupal stage on these three host plants at 25 and 30°C.