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Evaluation of Canola Cultivars for Resistance to Helicoverpa armigera (Lepidoptera: Noctuidae) Using Demographic Parameters

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Abstract:

The cotton bollworm, Helicoverpa armigera (Hübner) (Lepidoptera: Noctuidae) is one of the most important pests on a wide range of crops worldwide. The antibiotic resistance of 10 canola cultivars (‘Sarigol’, ‘Hayula420′, ‘Opera’, ‘Okapi’, ‘Modena’, ‘RGS003′, ‘Zarfam’, ‘Licord’, ‘Talaye’, and ‘SLM046') to H. arimgera was evaluated using demographic parameters including life table, reproduction, development, and adult longevity. Larval period ranged from 18.8 to 16.1 d on Hayula420 and RGS003, respectively. The longest development time of immature stages was on Sarigol and Hayula420 (36.8 d) and the shortest one was on Zarfam (34.8 d). The highest daily and total fecundity (1,082.4 and 254.8 eggs, respectively) was on RGS003 and the lowest was on Talaye (517.0 and 41.4 eggs, respectively). The rm values varied from 0.153 on Sarigol to 0.179 on Opera. The net reproductive rate (R0 ) was calculated to be lowest on Talaye (157.4) and highest on RGS003 (331.5). The comparison of demographic parameters of H. armigera on different cultivars of canola and the cluster analysis revealed that Hayula420, Talaye, Sarigol, and SLM046 were the most resistant cultivars to this insect. Such results could be useful to develop an integrated pest management strategy of H. armigera on canola cultivars.

Keywords: Helicoverpa armigera; antibiotic resistance; canola cultivar; demographic parameter; life table

Document Type: Research Article

DOI: http://dx.doi.org/10.1603/EC11068

Publication date: December 1, 2012

More about this publication?
  • Journal of Economic Entomology is published bimonthly in February, April, June, August, October, and December. The journal publishes articles on the economic significance of insects and is divided into the following sections: apiculture & social insects; arthropods in relation to plant disease; forum; insecticide resistance and resistance management; ecotoxicology; biological and microbial control; ecology and behavior; sampling and biostatistics; household and structural insects; medical entomology; molecular entomology; veterinary entomology; forest entomology; horticultural entomology; field and forage crops, and small grains; stored-product; commodity treatment and quarantine entomology; and plant resistance. In addition to research papers, Journal of Economic Entomology publishes Letters to the Editor, interpretive articles in a Forum section, Short Communications, Rapid Communications, and Book Reviews.
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