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Leaf Spot (Fungal)

Fusarium oxysporum

Leaf spot is a common descriptive term applied to a number of diseases affecting the foliage of ornamentals and shade trees. The majority of leaf spots are caused by fungi, but some are caused by bacteria. Some insects also cause damage that appears like a leaf spot disease. Leaf spots on trees are very common and generally do not require spraying. Leaf spot may result in some defoliation of a plant.

Identification

Fusarium Wilt is hard to distinguish from other wilt diseases as it generally produces symptoms such as wilting, chlorosis, necrosis, premature leaf drop, browning of the vascular system, stunting and damping-off. It is a soil-borne pathogen and so will transfer from crop to crop if they are planted in the same place which can be a factor in discerning the cause of the wilt.

Growth factors

Prefers moist soils and high temperatures but can survive in both arctic and desert conditions

Symptoms

  • Round spots usually on leaves

Biological treatment

strenthen plants by foliar food/plant resistant varieties/do not water overhead/remove infected plants/buy plants and seed from reliable sources!

Chemical treatment

sterilize water and tools an use all purpose fungicide

Affected plants

strawberries,beans,fruit like peaches

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