Baited traps may be an alternative to conventional pesticides in the integrated crop management of chicory (Compositae) in South Africa

Midgley, J. M. and Hill, M.P. and Villet, M.H. (2008) Baited traps may be an alternative to conventional pesticides in the integrated crop management of chicory (Compositae) in South Africa. Journal of Economic Entomology, 101 (1). pp. 99-106. ISSN 0022-0493

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Abstract

Chicory, Chicorium intybus L. (Compositae), is a major field crop in the Eastern Cape Province of South Africa. Several pests feed on the leaves of the plant, resulting in reduced yield. The most important of these are the noctuid moths Helicoverpa armigera (Hübner), Chrysodeixis acuta (Walker), and Trichoplusia orichalcea (F.). The use of attract-and-kill traps offers an alternative to broad-based insecticides in the control of these species. Three fields were treated with normal insecticides and three fields with yellow-baited traps. Eight additional traps were placed in each field, with half of the traps containing the insecticide 2,2-dichlorovinyl dimethyl phosphate (dichlorvos) and half without dichlorvos; and half yellow and half green. Total moth numbers and nonphytophage diversity were measured from these eight traps. Although no differences in H. armigera or T. orichalcea catches were observed between insecticide- and trap-treated fields, numbers of C. acuta and the total number of moths were significantly higher in insecticide-treated fields. Yellow traps containing dichlorvos contained more moths than yellow traps without dichlorvos, or green traps with dichlorvos, or green traps without dichlorvos; but they also contained more nonphytophagous insects. Yellow traps also enhanced the catches of thrips on card traps associated with them. These results offer an opportunity for the South African chicory industry to reduce pesticide applications and thus mitigate environmental impacts.

Item Type:Article
Additional Information:'This article is the copyright property of the Entomological Society of America and may not be used for any commercial or other private purpose without specific written permission of the Entomological Society of America' This article has been added to this repository in accordance with the permissions on the SHERPA website.
Uncontrolled Keywords:chicory, Chicorium intybus, attract-and-kill, African bollworm, Helicoverpa armigera. pesticides
Subjects:Q Science > QL Zoology > Invertebrates > Insects
S Agriculture > SB Plant culture
Divisions:Faculty > Faculty of Science > Zoology & Entomology
ID Code:1936
Deposited By: Prof Martin Villet
Deposited On:12 Apr 2012 08:08
Last Modified:14 May 2012 13:43
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