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Comparison of toxic and repellent effects of Lantana camara L. with Tephrosia vogelii hook and a synthetic pesticide against Sitophilus zeamais motschulsky (Coleoptera: Curculionidae) in stored maize grain

Comparison of toxic and repellent effects of Lantana camara L. with Tephrosia vogelii hook and a synthetic pesticide against Sitophilus zeamais motschulsky (Coleoptera: Curculionidae) in stored maize grain

Ogendo, J.O., Belmain, S.R., Deng, A.L. and Walker, D.J. (2003) Comparison of toxic and repellent effects of Lantana camara L. with Tephrosia vogelii hook and a synthetic pesticide against Sitophilus zeamais motschulsky (Coleoptera: Curculionidae) in stored maize grain. International Journal of Tropical Insect Science, 23 (02). pp. 127-135. ISSN 1742-7584 (doi:10.1017/S1742758400020348)

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Abstract

The insecticidal and repellent properties of Lantana camara and Tephrosia vogelii were evaluated against Sitophilus zeamais Motschulsky (Coleoptera: Curculionidae) in stored maize grain. Five treatment rates (1.0, 2.5, 5.0, 7.5 and 10.0% w/w) of each powdered plant material, an untreated control and a synthetic insecticide (Actellic Super™ 2% dust) were used to investigate treatment efficacy on mortality of the adult insect (five to eight days old), F1 progeny emergence and repellency against S. zeamais adults. After 21 days, L. camara and T. vogelii caused 82.7–90.0% and 85.0–93.7% insect mortality, respectively. The mean lethal exposure times (LT50) to achieve 50% mortality varied
from five to six days (7.5–10.0% w/w) to seven to eight days (2.5–5.0% w/w) for both plants. Probit regression analysis showed a significant relationship between plant powder concentration and insect mortality. The plant powders and synthetic insecticide reduced adult F1 insects by more than 75% compared to the untreated control. Tephrosia vogelii was most repellent to S. zeamais at 7.5–10.0% (w/w), repelling 87.5% of the insects, followed by T. vogelii at 2.5% w/w and L. camara at 10% w/w which repelled 65.0 and 62.5% of insects respectively. The implications of these results are discussed in the context of smallscale farmer usage of these plants for stored product protection.

Item Type: Article
Uncontrolled Keywords: Zea mays, botanical insecticides, grain storage, stored product protection
Subjects: S Agriculture > S Agriculture (General)
S Agriculture > SB Plant culture
Faculty / Department / Research Group: Faculty of Engineering & Science
Faculty of Engineering & Science > Natural Resources Institute
Faculty of Engineering & Science > Natural Resources Institute > Agriculture, Health & Environment Department
Related URLs:
Last Modified: 21 Aug 2015 14:30
Selected for GREAT 2016: None
Selected for GREAT 2017: None
Selected for GREAT 2018: None
URI: http://gala.gre.ac.uk/id/eprint/12543

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