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Buckeye rot of tomato
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Buckeye rot of tomato : ウィキペディア英語版
Buckeye rot of tomato

Buckeye rot of tomato is caused by the pathogen ''Phytophthora parasitica.'' It is a fungus that thrives in warm, wet conditions and lives in the soil. It is characterized by a bull’s eye pattern of dark brown rotting on the tomato fruit, and affects fruit that is close to, or lying on the soil. The easiest management is to keep the plant out of contact with the soil, although other chemical methods can be very effective. This disease commonly occurs in the southeast and southcentral areas of the United States. The disease has affected a large portion of crop yield in the United States as well as India. The relatively small genome size of ''Phytophthora parasitica'' compared to ''Phytophthora infestans'' gives researchers the unique ability to further examine its ability to cause disease.
== Hosts/Symptoms ==
Buckeye rot of tomato affects tomato plants, although there are many other plants that are affected, including pepper, potato, tobacco, pineapple, and various other hosts.〔 Upon infection, brown and greyish-green water soaked spots appear on the fruit. These spots develop into lesions that resemble the markings of a bull's eye with alternating dark and light brown concentric rings. These are very smooth lesions, barely raised, unlike the rough lesions found in late blight ''(Phytophthora infestans)'', which is a similar pathogen.〔 Finally, a white fungal-like growth may appear within the lesion.〔 While fruit rot is the most common symptom, damping off and stem cankers are possible.〔 The disease does not affect the foliage of the plant, which further helps separate it from late blight .〔

抄文引用元・出典: フリー百科事典『 ウィキペディア(Wikipedia)
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