Associates of Tomato Pathogens
Posted by Unknown on Thursday, January 1, 2015 | 0 comments
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| Diseased Leaf of Tomato infected by Plasmopara viticola |
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| Diseased Leaf of Tomato infected by Alternaria solani |
Leaf spot disease causes loss in productivity of the crop yield due to degradation of photosynthetic area. Downy mildew of tomato is caused by Plasmopara viticola. Disease severity is severe during rainy season in field condition and during winter in plastic houses (green house condition). Different factors affect the severity to cause a disease in plant. Factors like favourable climatic condition, optimum amount of pathogens, susceptibility of host plant, etc are not only the conditions to maximize the disease severity. Not a sole pathogen is singly responsible to cause a particular disease. It has been found that Helminthosporium solani was found associated with Alternatia solani from the Alternaria infected plant parts. Similarly, Verticillium tricorpus has been found associated with Septoria solani and Colletotrichum sp. and Stemphylium sp. was found associated with Plasmopara viticola.
The main feedback of the study is that a particular pathogen causing a particular disease is not responsible for maximizing disease severity but other associates also influence the severity.
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