Tarbiat Modares University Journal of Agricultural Science and Technology 1680-7073 18 1 2016 01 01 Bottom-up Effect of Two Host Plants on Life Table Parameters of Aphis gossypii (Hemiptera: Aphididae) 179 190 15845 EN Z. Tazerouni Deparment of Entomology, College of Agriculture, Tarbiat Modares University, P. O. Box: 14115-336, Tehran, Islamic Republic of Iran. A. A. Talebi Deparment of Entomology, College of Agriculture, Tarbiat Modares University, P. O. Box: 14115-336, Tehran, Islamic Republic of Iran. 0000-0001-5749-6391 Y. Fathipour Deparment of Entomology, College of Agriculture, Tarbiat Modares University, P. O. Box: 14115-336, Tehran, Islamic Republic of Iran. M. Soufbaf Agricultural, Medical and Industrial Research School, P. O. Box: 31485/498, Karaj, Islamic Republic of Iran. Journal Article 1970 01 01 <em>Aphis gossypii</em> Glover is one of the most important pests of greenhouse cucumber and pepper in the world and Iran. In this research, life table and biology of <em>A. gossypii</em> were investigated on cucumber (<em>Cucumis sativus</em> cv. Super Sultan) and pepper (<em>Capsicum annum </em>cv. Marqueza) in a growth chamber at 25±1°C and 60±5% RH and a photoperiod of 14 L: 10 D hour.The results showed thatdevelopmental time of <em>A. gossypii</em> on pepper was significantly longer than that on cucumber<em>. </em>The survival rates of <em>A. gossypii</em> on cucumber and pepper were significantly differentbased on Kolmogrov-Smirnov test results. The survival rates (l_x) at the beginning of female emergence were 94 and 66% on cucumber and pepper, respectively. Life expectancy (e_x) of the newly-bornnymphs of<em> A. gossypii</em> were obtained as 26.37 and 14.4 days on cucumber and pepper, respectively. The highest age-specific daily fecundity of <em>A. gossypii</em> was at the 5^th and 6^th days of female adult age on cucumber and from first to 4^th days of female adult life on pepper. Furthermore, two mathematical models (Analytis and Enkegaard) were fitted to age-specific fecundity data (m_x). Adult longevity of <em>A. gossypii</em> on cucumber was significantly higher than that on pepper. The <em>R</em>₀, <em>r_m</em> and <em>λ</em>-values of <em>A. gossypii</em> on cucumber were significantly higher than those on pepper. The cotton aphid exhibited longer mean generation time (T) on pepper than that on cucumber. According to the growth index and life table statistics, cucumber was the suitable host plant for <em>A. gossypii</em>. https://jast.modares.ac.ir/article_15845_9a912f218d27a625d946ed56081d9123.pdf