Study of Root-Knot Problems in Ajiwa Dam Area, Katsina State, Nigeria
A. K. Dalhatu | A. A. Khan | Z. D. Umar
<p class="Default"><span>The present study was undertaken to observe the root-knot problems in Ajiwa dam area, Katsina state. Surveys were done to determine the level of infestation, incidence, intensity and frequency of root-knot disease and to identify the root-knot nematodes associated with vegetables. The study showed that root-knot disease incidence in the area was fairly very high. Of the fields visited, about 42% fields were infested. Incidence of the disease in different fields and on different vegetables showed wide variation. Short pepper and tomato were most affected crops followed by onion, lettuce and carrot. Spinach was less affected. Two species <em>M. incognita </em>and <em>M. javanica </em>of root-knot nematodes were identified. <em>M. incognita </em>showed highest frequency (71.4%) and was dominant species in the studied area. <em>M. javanica </em>has lowest frequency (28.5%).</span></p><p>DOI: <a href="http://dx.doi.org/10.3126/ije.v4i1.12189">http://dx.doi.org/10.3126/ije.v4i1.12189</a></p><p class="Default"><strong>International Journal of Environment </strong></p> <p class="Default">Volume-4, Issue-1, Dec-Feb 2014/15, Page: 204-209</p> <p class="Default"> </p>
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