tailieunhanh - Temperature dependent life history traits of Brevicoryne brassicae (L.) (Hom., aphididae) on White Cabbage

The developmental time, survival rate and reproduction of the cabbage aphid, Brevicoryne brassicae (L.) (Homoptera, Aphididae), were evaluated on detached cabbage leaves (Brassicae oleracea var. capitata. | Turk J Agric For 29 (2005) 341-346 © TÜB‹TAK Temperature Dependent Life History Traits of Brevicoryne brassicae (L.) (Hom., Aphididae) on White Cabbage Serdar SATAR* University of Çukurova, Faculty of Agriculture, Department of Plant Protection, Adana - TURKEY Ulrich KERSTING European University of Lefke, Faculty of Agricultural Sciences and Technologies, Lefke, TRNC – Mersin 10, TURKEY M. R›fat ULUSOY University of Çukurova, Faculty of Agriculture, Department of Plant Protection, Adana – TURKEY Received: Abstract: The developmental time, survival rate and reproduction of the cabbage aphid, Brevicoryne brassicae (L.) (Homoptera, Aphididae), were evaluated on detached cabbage leaves (Brassicae oleracea var. capitata) at four constant and two alternating temperatures (15, 20, 25, 30, 25/30 and 30/35 ºC). Developmental periods of immature stages ranged from days at 15 ºC to days at 25/30 ºC. The alternating temperature of 30/35 ºC was lethal to immature stages of B. brassicae. The lower developmental threshold for the cabbage aphid was estimated at ºC and it required degree-days for a first instar to become an adult. The average longevity of adult females was reduced from days at 15 ºC to days at 30 ºC. The average reproduction rate per female (RO) was aphids/aphid at 25 ºC and aphids/aphid at 30 ºC. Mean generation time (TO) of the population ranged from days at 30 ºC to days at 15 ºC. The highest per capita growth rate (rm = aphids/aphid per day) occurred at 25 ºC, and the lowest at 30 ºC (rm = aphids/aphid per day). It was evident that temperatures above 25/30 ºC prolonged development, increased the mortality of immature stages, shortened adult longevity and reduced fecundity. The optimal range of temperature for the population growth of B. brassicae on white cabbage was 20 to 25/30 ºC. Key Words: Brevicoryne brassicae, development, longevity, fecundity, intrinsic rate of increase, white .