Fathipour, Y., Pourghasem, M., Bagheri, A., Talebi, A. A. (2020). Ten Widely Used Canola Genotypes: A Complex of Highly Resistant and Susceptible Hosts to Feeding Spodoptera exigua. , 22(6), 1511-1522.
Y. Fathipour; M. Pourghasem; A. Bagheri; A. A. Talebi. "Ten Widely Used Canola Genotypes: A Complex of Highly Resistant and Susceptible Hosts to Feeding Spodoptera exigua". , 22, 6, 2020, 1511-1522.
Fathipour, Y., Pourghasem, M., Bagheri, A., Talebi, A. A. (2020). 'Ten Widely Used Canola Genotypes: A Complex of Highly Resistant and Susceptible Hosts to Feeding Spodoptera exigua', , 22(6), pp. 1511-1522.
Fathipour, Y., Pourghasem, M., Bagheri, A., Talebi, A. A. Ten Widely Used Canola Genotypes: A Complex of Highly Resistant and Susceptible Hosts to Feeding Spodoptera exigua. , 2020; 22(6): 1511-1522.

Ten Widely Used Canola Genotypes: A Complex of Highly Resistant and Susceptible Hosts to Feeding Spodoptera exigua

Journal of Agricultural Science and Technology
Article 8, Volume 22, Issue 6, 2020, Pages 1511-1522    PDF (896.47 K)
Document Type: Original Research
Authors
Y. Fathipour* 1; M. Pourghasem1; A. Bagheri2; A. A. Talebi1
1Department of Entomology, Faculty of Agriculture, Tarbiat Modares University, P. O. Box: 14115-336, Tehran, Islamic Republic of Iran.
2Plant Protection Research Department, Hormozgan Agricultural and Natural Resources Research and Education Center, Agricultural Research Education and Extension Organization (AREEO), Bandar Abbas, Islamic Republic of Iran.
Abstract
The nutritional indices are an important tool in evaluating herbivore responses to variation in host nutritive properties. The current study was conducted to unveil the effects of ten canola cultivars (Brassica napus L.) ('Opera', 'Licord', 'Okapi', 'Talaye', 'Zarfam', 'Modena', 'SLM046', 'Sarigol', 'RGS003' and 'Hayula420') on consumption and utilization indices of the Spodoptera exigua (Hübner) larvae. The results revealed significant differences in nutritional indices of different larval instars of S. exigua fed on the mentioned canola cultivars. The highest value of Digestion Ability of food (AD) for the third and fourth instars was observed on Licord (86.57% and 83.08%, respectively), and for the fifth instars was on Opera (68.79%). The Relative Growth Rate (RGR) and Relative Consumption Rate (RCR) in the fifth instar larvae were significantly greater on Opera, Okapi and Talaye, whereas the lowest values of Conversion Efficiencies (ECI and ECD) were recorded on these cultivars. The highest ECI was observed in the larvae that consumed RGS003 (24.27%), Hayula420 (20.36%), and Sarigol (19.17%). Furthermore, the larvae reared on Okapi exhibited the highest RGR, which confirms high susceptibility of this cultivar. Based on the obtained results, Okapi, Talaye and Opera were the cultivars susceptible to S. exigua.
Keywords
beet armyworm; Brassica napus; nutritional indices; Resistant cultivars
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