Effects of organic and synthetic fertilizer sources on pest and predatory insects associated with tomatoes
- 680 Downloads
The effects of organic (composted cow manure) and synthetic (NPK) fertilizers on pests (aphids and flea beetles) and predatory arthropods (anthocorids, coccinellids and chrysopids) associated with tomatoes were evaluated in a 2-year randomized complete block field experiment. Our data suggested that the application of either organic or synthetic fertilizers could increase pest populations on tomatoes. However, there were lower populations of aphids on tomatoes grown with the organic fertilizer than on those grown with the synthetic fertilizers in the second year of the experiment, indicating that organic fertilizers may have the potential to reduce pest attacks in the long term. Anthocorid populations were larger on tomato plants with high aphid populations in the synthetic than in the organic fertilizers-treated plots.
Key wordsSynthetic fertilizers organic fertilizers plant pests predatory insects tomatoes
Unable to display preview. Download preview PDF.
- 3.Bentz, J.-A., Reeves, J. III, Barbosa, P. and Francis, B. (1995) Nitrogen fertilizer effect on selection, acceptance, and suitability ofEuphorbia pulcherrima (Euphorbiaceae) as a host plant toBemisia tabaci (Homoptera: Aleyrodidae).Environ. Entomol. 24:40–45.Google Scholar
- 6.Edwards, C.A. and Stinner, B.R. (1990) The use of innovative agricultural practices in a farm systems context for pest control in the 1990s.Brighton Crop Protection Conf. — Pests and Diseases vol. 7C-3, pp. 679–684.Google Scholar
- 11.Hunt, D.W.A., Drudy, C.G. and Maw, H.E.L. (1992) Influence of nitrogen on the performance of Colorado potato beetle (Coleoptera: Chrysomelidae) on tomato.Environ. Entomol. 21:817–821.Google Scholar
- 12.Jansson, R.K. and Smilowitz, Z. (1986) Influence of nitrogen on population parameters of potato insects: Abundance, population growth and within-plant distribution of the green peach aphid,Myzus persicae (Homoptera: Aphididae).Environ. Entomol. 15:49–55.Google Scholar
- 17.Patriquin, D.G., Baines, D. and Abboud, A. (1995) Diseases, pests and soil fertility.in: Cook, H.F. and Lee, H.C. [Eds.] Soil Management in Sustainable Agriculture. Wye College Press, Wye, UK. pp. 161–174.Google Scholar
- 20.Rao, K.R. (2002) Induced host plant resistance in the management of sucking insect pests of groundnut.Ann. Plant Prot. Sci. 10:45–50.Google Scholar
- 22.Sudhakar, K., Punnaiah, K.C. and Krishnayya, P.V. (1998) Influence of organic and inorganic fertilizers and certain insecticides on the incidence of shoot and fruit borer,Leucinodes orbonalis Guen. infesting brinjal.J. Entomol. Res. 22:283–286.Google Scholar