Dissipation Studies of Metalaxyl M Pesticide on Potatoes In Nyandarua County, Kenya

Authors

  • Bonface N. Kamau  Department of Chemistry, School of Physical Sciences, College of Biological University of Nairobi, P.O. Box 30197-00100, Nairobi.
  • Shem O. Wandiga  Institute of Climate Change and Adaptation, College of Biological University of Nairobi, P.O. Box 30197-00100, Nairobi.
  • Vincent O. Madadi  Department of Chemistry, School of Physical Sciences, College of Biological University of Nairobi, P.O. Box 30197-00100, Nairobi.

Keywords:

Metalaxyl M dissipation, pesticides half-lives, crop pests and disease protection

Abstract

Vegetables are widely consumed because of the vital role they play to provide vitamins and minerals in the diet, besides supplying proteins and energy. However they are prone of attacks by various pests and diseases leading to high loses and poor quality products. The overall objective of this study was to assess whether dissipation of Metalaxyl M on potatoes in Nyandarua County was contributing to ineffective management of the crops evidenced by high loses of the crop produce irrespective of continuous application of the pesticide. We collected samples from the farms and markets analysed resides of Metalaxyl M using GC-MS. The half-life of Metalaxyl M dissipation was calculated using the Langmuir-Hinshelwood kinetic model. The results revealed Metalaxyl M dissipation half-life of 3.13 days and 3.61 days on potatoes and soil respectively. The residues of Metalaxyl M were below the limit of detection after the 7th day of application suggesting that the pesticide was no longer effective early and late bright. All the Potatoes samples collected from the three markets open air of Njabini, Kiburu and Tulaga had no residues of Metalaxyl M. Lack of integrating data on dissipation of Metalaxyl M pesticide in developing application intervals of the pesticide is contributing to ineffective control of crop pests and diseases in production of potatoes in the region.

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International Journal of Scientific Research in Science, Engineering and Technology

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Published

2017-08-31

Issue

Volume 3, Issue 5, July-August-2017

Section

Research Articles

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How to Cite

[1]
Bonface N. Kamau, Shem O. Wandiga, Vincent O. Madadi, " Dissipation Studies of Metalaxyl M Pesticide on Potatoes In Nyandarua County, Kenya, International Journal of Scientific Research in Science, Engineering and Technology(IJSRSET), Print ISSN : 2395-1990, Online ISSN : 2394-4099, Volume 3, Issue 5, pp.221-229, July-August-2017.