MANAGEMENT OF TOMATO EARLY BLIGHT, CAUSED BY Alternaria solani WITH RESISTANCE INDUCER CHEMICALS (RIC) AND FUNGICIDES | ||
| Fayoum Journal of Agricultural Research and Development | ||
| Article 6, Volume 26, Issue 2, July 2012, Pages 76-83 PDF (457.74 K) | ||
| Document Type: Research articles. | ||
| DOI: 10.21608/fjard.2012.194697 | ||
| Author | ||
| Osama Yosof Mohamed Shalaby | ||
| Agric. Botany Dept., Fac. Agric., Fayoum University | ||
| Abstract | ||
| The resistance inducer chemicals (RIC), i.e. Bion, Cobalt chloride, Ecophote, Photophor and Salicylic acid and the two fungicides; i.e. Concento and Score used in this investigation caused different degrees of inhibition to the radial growth of Alternaria solani, the causal fungus of tomato early blight. In general, both of the two aforementioned fungicides were more effective than RIC in reducing the radial growth of A. cucumerinum. Also, the reduction in the radial growth increased by increasing the concentration of both the tested RIC and fungicides. Field experiments curried out during 2011 and 2012 growing seasons revealed that both of the tested RIC and fungicides resulted in significant reduction in the natural infection of tomato early blight consequently fruit yield was increased compared with control treatment. On the otherhand, spraying RIC after application of the aforementioned two fungicides was more effective in reducing the disease severity compared with spraying the fungicides or RIC each alone. All applications of RIC and fungicides, each alone resulted in considerable increase to oxidative-reductive enzymes; i.e. polyphenol oxidase, peroxidase and ascorbic acid oxidase compared with control treatment. However, RIC increased enzymatic activity compared with the two tested fungicides. | ||
| Keywords | ||
| Resistance Inducer Chemicals; Alternaria solani; Tomato early blight; Diseases severity; Enzymatic activity | ||
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