Asian Journal of Research in Crop Science <p><strong>Asian Journal of Research in Crop Science</strong> <strong>(ISSN: 2581-7167)</strong> aims to publish high quality papers (<a href="/index.php/AJRCS/general-guideline-for-authors">Click here for Types of paper</a>) on all aspects of Crops. By not excluding papers based on novelty, this journal facilitates the research and wishes to publish papers as long as they are technically correct and scientifically motivated. The journal also encourages the submission of useful reports of negative results. This is a quality controlled, OPEN peer-reviewed, open-access INTERNATIONAL journal.</p> <p>This is an open-access journal which means that all content is freely available without charge to the user or his/her institution. Users are allowed to read, download, copy, distribute, print, search, or link to the full texts of the articles, or use them for any other lawful purpose, without asking prior permission from the publisher or the author. This is in accordance with the BOAI definition of open access.</p> <p>Every issue will consist of a minimum of 5 papers. Each issue will be running, and all officially accepted manuscripts will be immediately published online. The state-of-the-art running issue concept gives authors the benefit of 'Zero Waiting Time' for the officially accepted manuscripts to be published. This journal is an international journal and its scope is not confined by the boundary of any country or region.</p> SCIENCEDOMAIN international en-US Asian Journal of Research in Crop Science 2581-7167 Effect of Methanolic Extracts of Senna didymobotrya and Moringa oleifera on Growth of Ralstonia solanacearum <p><a name="_Toc469933464"></a>Tomato is one of the most important vegetables in the world. <em>Ralstonia solanacearum </em>causes<em> a </em>devastating bacterial wilt that is wide-spread throughout tropical environments that has been difficult to control with chemicals and African cultural practices in poor regions of the world. This study was initiated to determine the inhibitory effect of methanolic root extract of <em>Senna didymobotrya</em> and <em>Moringa oleifera </em>seed extracts on growth and development of <em>R. solanacearum.</em> The study was conducted both in the Laboratory and in the green house in Maseno from where <em>S. didymobotrya </em>and <em>M. oleifera</em> specimens used were collected from the University Botanic Garden, dried under shade for 30 days, before being ground into a fine powder. 1000 grams of the plant powder was later transferred into a conical flask and covered with 250mls of methanol. Filtration was done and the extracts concentrated. Ten diseased tomato plants showing bacterial wilt symptoms earlier collected from Maseno, Mariwa, Seme and Holo all within Kisumu county (Kenya) were cut to obtain plant sections (0.5–1cm) that were later plated onto Triphenyltetrazolium chloride media. Bacteriostatic activity of the extracts was determined by the disc diffusion method on Mueller Hinton agar.<em> In vivo </em>evaluations were conducted in a green house using tomato seedlings. Data collected was subjected to analysis of variance and means separated were compared using least significance difference (P≤ 0.05). Both plants extracts showed inhibitory activity against <em>R. solanacearum</em> pathogen (<em>M.&nbsp; </em><em>Oleifera</em>; 8.5 and <em>S</em>. <em>didymobotrya </em>9.2). Based &nbsp;on the outcome of this study, <em>S</em>. <em>didymobotrya </em>is recommended as a&nbsp; potential botanical agent suitable for future trials and use in the control of <em>R. solanacerum </em>by tomato farmers in Maseno region Kisumu county.</p> George T. Opande Buyela D. Khasabulli David M. Musyimi ##submission.copyrightStatement## 2022-09-24 2022-09-24 1 13 10.9734/ajrcs/2022/v7i4140