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Tomato mosaic virus : ウィキペディア英語版 | Tomato mosaic virus
Tomato mosaic virus (ToMV) is a plant pathogenic virus. It is found worldwide and affects tomatoes and many other plants. ==Symptoms== The foliage of affected tomato plants shows mottling, with alternating yellowish and darker green areas, the latter often appearing thicker and raised giving a blister-like appearance. The leaves tend to be fern-like in appearance with pointed tips and younger leaves may be twisted. The fruit may be distorted, yellow blotches and necrotic spots may occur on both ripe and green fruit and there may be internal browning of the fruit wall. In young plants, the infection reduces the set of fruit and may cause distortions and blemishes. The entire plant may be dwarfed and the flowers discoloured.〔(University of Minnesota )〕 Environmental conditions influence the symptoms. These include temperature, day length and light intensity as well as the variety, the age of the plant at infection and the virulence of the strain of ToMV.〔(World Vegetable Center )〕
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