APHIS GOSSYPII GLOVER برآورد پارامترهاي جدول زندگي باروري شته جاليز

Fertiltiy Life Table Parameters Estimation of Aphis gossypii Glover

Fertility life table parameters for Aphis gossypii Glover were studied on cucumber, pumpkin and squash under laboratory conditions of 25±1 °C, 75±5 RH, and 16:8(L:D) . Standard error of population growth parameters was calculated by using the Jackknife method. Net reproductive rates (Ro) on cucumber, pumpkin and squash were computed 76.789±7.806, 32.70406.402 and 43995±4.041, respectively. According to the Birch method of intrinsic rate of increase(rm) calculation, rm estimates were 0.492±0.01 on squash, 0.472±0.013 on cucumber and 0.393±0.019 on pumpkin. Based on Wyatt and White method, rm values on aforementioned plants were calculated as 0.51200.014, 0.46400.027 and 0.37100.032, respectively that are similar to the results in the Birch method. Doubling time(DT) was the lowest on squash(l.409±0.03) and the highest on pumpkin(1.758±0.085).