Ammonium sulphate fertiliser increases larval populations of Anopheles arabiensis and culicine mosquitoes in rice fields
Publication Type
Journal Article
Journal Name
Acta Tropica
Publication Date
1-1-2004
Abstract
Field experiments were conducted in central Kenya, to study the effect of ammonium sulphate fertiliser ((NH4)2SO4) on mosquito larval populations in rice fields. The experiments used a complete randomised block design having four blocks with two experimental ponds per block, and the fertiliser and control treatments allocated randomly among the ponds. Student's two-sample unpaired t-test was used to test for the significance of differences between the relative counts of larvae in fertiliser and control treatments. The results showed a significant overall increase in the larval populations of An. arabiensis (P<0.01) and culicine mosquitoes (P<0.05), after ponds were treated with the fertiliser. Significantly more fourth instar larvae of An. arabiensis were collected in fertiliser than control plots (P<0.001). An. arabiensis data indicated that the first fertiliser application had the most impact, compared to the second and third applications. This was evident in a significant peak of combined first and second instar An. arabiensis larvae observed 5 days after the first fertiliser application (P<0.05). The studies suggest that ammonium sulphate fertiliser reduces turbidity of water in rice fields, thereby making them visually more attractive for egg-laying by An. arabiensis and culicine mosquitoes. © 2003 Elsevier B.V. All rights reserved.
Keywords
Ammonium sulphate, Anopheles arabiensis, Fertiliser, Kenya, Larval control, Malaria, Rice fields, Water turbidity
PubMed ID
14732240
Recommended Citation
Mutero, C., Ng'ang'a, P., Wekoyela, P., Githure, J., & Konradsen, F. (2004). Ammonium sulphate fertiliser increases larval populations of Anopheles arabiensis and culicine mosquitoes in rice fields. Acta Tropica, 89 (2), 187-192. https://doi.org/10.1016/j.actatropica.2003.08.006