Evaluating Pyrethroid Alternatives for the Management of Cotton Bollworms and Resistance in Cameroon

Achaleke, J and Vaissayre, M and Brevault, T (2009) Evaluating Pyrethroid Alternatives for the Management of Cotton Bollworms and Resistance in Cameroon. Experimental Agriculture, 45. pp. 35-46.

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In sub-Saharan Africa, the bollworm complex, including Helicoverpa armigera, Diparopsis watersi and Earias spp., threatens the continued success of cotton production. Pyrethroid resistance in H. armigera led to serious crop losses while endosulfan, a suitable alternative to pyrethroids, was banned for cotton pest management. Five candidates with no cross-resistance to pyrethroids were evaluated in both on-station and on-farm trials from 2002 to 2006. Two applications were made at the early peak of H. armigera infestation in September, the period when pyrethroid use should be restricted for resistance management purposes. Results showed that, as expected, bollworm infestation consistently peaked from mid-September to mid-October. Spinosad, thiodicarb and emamectin-benzoate were the most suitable alternatives to reduce damage, regardless of the cotton bollworm species. Indoxacarb and lufenuron were less effective in controlling D. watersi. On-farm experiments confirmed the suitability of spinosad for control of pyrethroid-resistant H. armigera, particularly on late sown fields. These new chemistries offer control of bollworms which justify their relevance for pyrethroid resistance management in Cameroon and sub-Saharan Africa.

Item Type: Article
Additional Information: We express our sincere gratitude to the Cameroon Cotton Development Industry (SODECOTON) and to ARDESAC Project for providing financial and technical assistance. We are grateful to Mrs Christa Ellers-Kirk and the anonymous reviewers for comments and helpful suggestions.
Uncontrolled Keywords: Pyrethroid, Cotton Bollworms, Cameroon, Helicoverpa armigera, Diparopsis watersi and Earias
Author Affiliation: IRAD, PRASAC-ARDESAC, Cotton Program, Garoua, Cameroon
Subjects: Plant Protection
Divisions: Other Crops
Depositing User: Mr Siva Shankar
Date Deposited: 19 Apr 2012 04:27
Last Modified: 19 Apr 2012 04:28
Official URL: http://dx.doi.org/10.1017/S0014479708007060
URI: http://eprints.icrisat.ac.in/id/eprint/4838

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