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''Pestalotiopsis palmarum'' is a plant pathogen infecting bananas, date and coconut palms. Host Can affect and has been isolated from many varieties of palm and the fungus is not host specific so the disease could be present in many more. Symptoms The first symptoms of Pestalotiopsis palmarum begin as very small yellow, brown or black discoloration of the leaves. The disease can be restricted to the leaf blade or may only appear on the petiole and rachis right away. Spots and discoloration areas can be smaller than ¼ inch in size, but under optimal conditions can grow much larger eventually forming lesions. Extreme wilting and a drying appearance on the leaves is also a major symptom of Pestalotiopsis palmarum. Management Wind and water movement easily disperses spores of Pestalotiopsis palmarum so sanitation and irrigation management can be proven to be critical in preventing the movement of the disease. Limiting the length of time that the leaves are wet when exposed to high humidity levels and eliminating overhead irrigation can prevent inoculation on leaves. Based on the amount of disease on the leaves, pruning the leaves could possibly get rid of the disease, but one needs to decide if pruning the leaves is worth the nutrient deficiency that will follow. Fungicides are also available for managing the disease, but alone will not solve the problem. Fungicides will prevent infection of healthy leaves, but infected leaves will stay infected until the leaf dies. Using multiple of these techniques at the same time is recommended for optimal management of the disease == External links == * (Index Fungorum ) * (USDA ARS Fungal Database ) 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Pestalotiopsis palmarum」の詳細全文を読む スポンサード リンク
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