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1 December 2010 Bottom-Up Effect of Different Host Plants on Plutella xylostella (Lepidoptera: Plutellidae): A Life-Table Study on Canola
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The effects of 10 commercial canola, Brassica napus L., cultivars widely grown in Iran—‘SLM046,’ ‘Opera,’ ‘Okapi,’ ‘RGS003,’ ‘Modena,’ ‘Sarigol,’ ‘Zarfam,’ ‘Licord,’ ‘Hayula420,’ and ‘Talaye’—on the demographic parameters of diamondback moth, Plutella xylostella L. (Lepidoptera: Plutellidae), were determined. The experiments were conducted in a growth chamber at 25 ± 1°C, 65 ± 2% RH, and aphotoperiod of 16:8 (L:D) h. The comparison of intrinsic rate of natural increase (rm), net reproductive rate (R0), and the survival rate of adult stage of P. xylostella on 10 canola cultivars suggested that this pest performed best on SLM046. The rm value of P. xylostella ranged between 0.241 on RGS003 and 0.304 on SLM046. The R0, finite rate of increase (λ), mean generation time (T), and doubling time (DT) values of P. xylostella on SLM046 were 52, 1.35, 13.4, and 2.35 and on RGS003 were 31, 1.27, 14.4, and 2.94, respectively. The Weibull model adequately described the shape of the survivorship curve of adult P. xylostella from life-table data. A significant fit was obtained with the Weibull model for P. xylostella in all experimental canola cultivars. As a result, SLM046 Opera, and Hayula420 were the most suitable hosts and had least negative impact on life-history statistics of the pest.

© 2010 Entomological Society of America
Mahmoud Soufbaf, Yaghoub Fathipour, Javad Karimzadeh, and Myron P. Zalucki "Bottom-Up Effect of Different Host Plants on Plutella xylostella (Lepidoptera: Plutellidae): A Life-Table Study on Canola," Journal of Economic Entomology 103(6), 2019-2027, (1 December 2010).
Received: 10 January 2010; Accepted: 1 June 2010; Published: 1 December 2010

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