Alternaria cucumerina. Rui map Zheng. Alternaria leaf blight. Alternaria cucumerina. Gerald Holmes. Alternaria leaf blight. Alternaria cucumerina. Gerald Holmes. Alternaria cucumerina is an important pathogen of some Cucumis, Cucurbita and Citrullus species with a wide distribution, including several. Alternaria leaf spot or blight of cucurbits or vine crops is caused by the fungus Alternaria cucumerina. The disease is widespread and often damaging in.

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Some resistant varieties are available. Common Names and Diseases. New Disease Reports 23 Disease severity increases with periods of leaf wetness.

Alternaria cucumerina is an important pathogen of some CucumisCucurbita and Citrullus species with a wide distribution, including several European and Asian countries Ellis, Mikologiya i Fitopatologiya 33 Alternaria cucumerina is a fungus of world-wide occurrence which can infect most cucurbits. Other parts of the plant are not directly affected. Vegetable Disease and Their Control. Plant Disease 76 The spots start as small, necrotic flecks.

Retrieved from ” http: An indirect effect is seen the fruit production. There are no resistant cultivars available.


This page was last modified Lesions tend allternaria appear first on the older leaves as small circular spots. Fungal isolates with morphological characteristics similar to those of A.

The overwintering fungus serves as the source of primary infections and spores from these infections cycle the disease through the growing season. The infection may also begin at the blossom end with the entire fruit eventually turning brown and shriveling. Environmental Conditions Alternarka by A.

Alternaria cucumerina (Alternaria Leaf Blight of cucurbits)

References Egorova LN, North American Aquatic Connectivity Collaborative. Reduce relative humidity in greenhouse operations.

Cooperative Extension and other agencies of the Cucumegina. The source of the disease is considered to be dormant mycelium in cucurbit fields and airborne conidia. After seven days, large solitary conidia were formed on the surface of the agar. John Wiley and Sons, New York.

Insect Cuccumerina, Ticks and Plant Diseases. Lesions show the concentric rings that are characteristic of Alternaria infections. Information in this publication is provided purely for educational purposes.

Defoliation exposes the fruit to sunscald which reduces fruit quality. Alternaria leaf spot may cause reduced yield and smaller fruit. Provide adequate nutrition and appropriate growing conditions to reduce crop stress.

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Control Remove crop refuse at the end of the season. Alternaria Leaf Spot is caused by Alternaria cucumerina and can cause serious damage under extended periods of wet weather. Alternaria cucumerina Alternria cucumerina is most common on melons and watermelons, although it can affect most cucurbit crops.

Alternaria cucumerina (Alternaria Leaf Blight of cucurbits) – Bugwoodwiki

Lesions are most often seen on leaves, but fruit spots have been allternaria. Lesions can coalesce and the leaves develop a cupped appearance and die. Content is available for non-profit, educational use under our Copyright Agreement.

Rotations which exclude cucurbits for years may be beneficial. Fungicides For Alternaria Control. Spores are readily wind-blown and splashed by rain. To our knowledge, this is the first documented detection of A.

The University of Maine Orono, Maine