Foliar insect pest management on cowpea (Vigna unguiculata Walpers) in simulated varietal mixtures II. Pest resistance management implications

A - Papers appearing in refereed journals

Ward, A., Morse, S., Denholm, I., Thompson, R. and Mcnamara, N. 2002. Foliar insect pest management on cowpea (Vigna unguiculata Walpers) in simulated varietal mixtures II. Pest resistance management implications. Field Crops Research. 79 (1), pp. 67-80.

AuthorsWard, A., Morse, S., Denholm, I., Thompson, R. and Mcnamara, N.
Abstract

Field experiments were established in which cowpea (Vigna unguiculata Walpers) was treated with a series of partial insecticide (carbofuran) application treatments to simulate (susceptible/resistant) varietal mixtures and a series of inter-crops with soybean (Glycine max). Treatments were sampled for damage by the foliage pests Ootheca mutabilis Sahlberg and Aphis craccivora Koch and for flower production. The soybean is likely to have provided both a mechanical barrier to pest movement and disruption to O. mutabilis through volatile allelochemicals. The comparison between the two treatment types would suggest whether similar mechanisms were the cause of pest reductions observed in partial insecticide applications on cowpea. The results suggested that the inter-cropping with soybean was not as effective in managing pest populations as a partial insecticide application and could even increase pest numbers. Further examination of the data from the partial insecticide application treatments appeared to show that the pest infestation was lower on the untreated plants closest to the insecticide-treated plants. This could be as a result of pest redistribution onto insecticide-treated plants after initial colonisation. The implications of this, in terms of pest resistance management are discussed. 

Year of Publication2002
JournalField Crops Research
Journal citation79 (1), pp. 67-80
Digital Object Identifier (DOI)doi:10.1016/S0378-4290(02)00137-5
Open accessPublished as non-open access
Funder project or code433
445
513
510
Ecological genetics and management of insecticide resistance
Output statusPublished
Publication dates
Online20 Sep 2002
Publication process dates
Accepted11 Jul 2002
Copyright licensePublisher copyright
ISSN0378-4290
PublisherElsevier Science Bv

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