Last edited by Kagalrajas
Tuesday, May 12, 2020 | History

1 edition of Alternaria leafspot disease of cucurbits found in the catalog.

Alternaria leafspot disease of cucurbits

by C. R. Jackson

  • 48 Want to read
  • 11 Currently reading

Published .
Written in English

    Subjects:
  • Leaf spots,
  • Alternaria,
  • Cucurbitaceae

  • Edition Notes

    Statementby Curtis Rukes Jackson
    The Physical Object
    Paginationv, 78 leaves :
    Number of Pages78
    ID Numbers
    Open LibraryOL25725074M
    OCLC/WorldCa36792361

    Alternaria leaf spot symptom starts as small circular leaf spots on older leaves on cantaloupe, cucumber and watermelon. The disease is not commonly seen on other cucurbits. The leaf spots can be few to numerous that are spread throughout the leaves. Alternaria leaf blight is a common disease on cantaloupe and of less importance on cucumber, watermelon and squash. Symptoms first appear on the upper leaf surface as small, circular, tan spots with white centers. These spots enlarge, turn light brown and form a slight depression.

    Alternaria leaf spot can occur on the same leaf as leaf lesions of gummy stem blight (see PP Fact Sheet No. 27) and be similar in ap-pearance. Also, downy mildew (see PP Fact Sheet No. 2) and Cercospora leaf spots can oc-cur simultaneously with Alternaria leaf spot, but these leaf diseases are usually distinguish-able from Afternaria leaf spot. In the 20 years since APS PRESS published the first edition of Compendium of Cucurbit Diseases, worldwide production of watermelon, cucumber, melon, and squash has roughly doubled. Wherever your cucurbits are grown, the Compendium of Cucurbit Diseases and Pests, Second Edition provides the latest pest management and diagnostic information to suppress diseases of all cultivated cucurbits .

    Texas A&M University - Academic analyses and information on horticultural crops ranging from fruits and nuts to ornamentals, viticulture and wine. Cucurbits are affected by a number of pathogens, which cause major and minor diseases in seeds, seedlings, crops, and post-harvest diseases. The Department of Agriculture of Bangladesh recorded 14 different diseases caused by fungi, bacteria, and nematodes in various cucurbits in [ 1 ].Cited by: 2.


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Alternaria leafspot disease of cucurbits by C. R. Jackson Download PDF EPUB FB2

Alternaria leaf spot or blight of cucurbits or vine crops is cause d by the fung us Alternaria cucumerina. The disease is widespread and often damaging in Illinois after wet weather with temperatures between 68° and 90°F (20° to 32°C). Alternaria leaf spot is most severe on muskmelon and cantaloupe on sandy Size: KB.

texts All Books All Texts latest This Just In Smithsonian Libraries FEDLINK (US) Genealogy Lincoln Collection. National Emergency Library. Top American Libraries Canadian Libraries Universal Library Community Texts Project Gutenberg Biodiversity Heritage Library Children's Library.

Open : Fungal Diseases of Subterranean Parts; Acremonium Hypocotyl Rot; Charcoal Rot; Fusarium Wilts; Fusarium Wilt of Watermelon; Fusarium Wilt of Melon; Fusarium Wilt of Cucumber; Fusarium Crown and Foot Rot of Squash; Other Wilt Diseases Caused by Fusarium spp.; Lasiodiplodia Vine Decline (See Lasiodiplodia Fruit Rot); Monosporascus Root; Rot and Vine Decline; Phomopsis Black Root Rot of Cited by: ALTERNARIA LEAF SPOT OR BLIGHT OF CUCURBITS Alternaria leaf blight, caused by the fungus Alternaria cucumerina, is a foliar disease that occur on all cucurbits, but main hosts are cantaloupe and watermelon.

Foliar defoliation, caused by this disease, may result in reduction in yield and quality. Alternaria leaf spot occurs Size: KB. Alternaria Leaf Spot is caused by Alternaria cucumerina and can cause serious damage under extended periods of wet weather. High relative humidity is required for the production of conidia, which will be spread by wing and rain.

The occurrence of this disease in Georgia is sometimes sporadic but can be devastating if left unchecked. Symptoms. Cucurbits with Alternaria Leaf Blight. Cucurbits are plants in the gourd family. These include gourds, melons, squash, pumpkin, cucumber and many others.

A fungal disease known as alternaria leaf spot, alternaria leaf blight or target leaf spot is known to affect several members of the cucurbit family, but is especially a problem on watermelon and cantaloupe plants.

Leaf blight of cucurbits is caused by the fungal pathogen Alternaria cucumerina. the angula r leaf spot. The disease o ccasionally occurs on young stems, but young fruits may be infested.

The appeara nce of disease on fru its is erratic and can b e correlated with moisture. Downy mildew is one of the most important leaf diseases of cucurbits.

Typically, symptoms begin as small yellow areas on the upper leaf surface. As lesions. Cucurbits are warm weather crops which are sown, grown and harvested over spring, summer and autumn. This Primefact covers common cucurbit diseases caused by fungi, bacteria and viruses.

There are other less common diseases affecting cucurbits which are not covered here. Although descriptions of the more common diseases have been given to. Fungal diseases; Alternaria leaf blight Alternaria cucumerina: Alternaria leaf spot Alternaria alternata cucurbitae. Anthracnose (stem, leaf and fruit) Colletotrichum orbiculare = Colletotrichum lagenarium Glomerella lagenarium [teleomorph] Belly rot Rhizoctonia solani Thanatephorus cucumeris [teleomorph] Black root rot Thielaviopsis basicola.

Alternaria cucumerina Alternria cucumerina is most common on melons and watermelons, although it can affect most cucurbit crops. It is prevalent in regions with abundant rainfall and high In the picture above, A.

cucumerina is probably secondary to Fusarium infection and occurs as. Common Names of Plant Diseases - Diseases of Cucurbits A. Keinath, W. Wintermantel, T. Zitter, and A. Rossman, primary collators (last update: 6/15/) BACTERIAL DISEASES Angular leaf spot Pseudomonas syringae pv.

lachrymans (Smith & Bryan) Young et al. Bacterial brown spot Pantoea ananatis Serrano) Mergaert, Verdonck, & Kersters &. “Alternaria Leaf Spot Disease on ” An-Najah Univ. Res.

Sc), Vol. 17(2), used to compare their susceptibility to disease-infection 6 days after : Yacoub Batta. Alternaria leaf blight of Cucurbits. Alternaria cucumerina. Another name for this disease is target leaf spot which refers to the appearance of the lesions on the upper surface of the leaves.

Lesions tend to appear first on the older leaves as small circular spots. The spots are light brown with a light center and form concentric dark rings as. Alternaria leaf blight of Cucurbits Alternaria cucumerina Another name for this disease is target leaf spot which refers to the appearance of the lesions on the upper surface of the leaves.

Alternaria leaf blight on cucurbits This disease has been seen rarely on Long Island. It is not considered an important disease of cucurbits, but can cause defoliation resulting in yield loss when left unmanaged especially during rainy periods or where overhead irrigation is used.

The fungus Alternaria cucumerina causes Alternaria leaf blight. This disease is most common melon, but can also affect cucumber, pumpkin and squash. Alternaria leaf blight does not commonly infect fruit. It can reduce yield and quality through reduced plant vigor and sunscald of exposed fruit.

For more information on this disease, please see our main Cucurbits, Alternaria Leaf Spot article. Alternaria leaf spot affects all cucurbit crops but is most common on cantaloupe. The disease is caused by the fungus Alternaria cucumerina which, like other Alternaria species, can cause a characteristic target-like spot.

Usually, leaf spots. Compendium of Cucurbit Diseases and Pests: Second Edition - Kindle edition by Keinath, A.P., Zitter, T.A., Wintermantel, W.M. Download it once and read it on your Kindle device, PC, phones or tablets.

Use features like bookmarks, note taking and highlighting while reading Compendium of Cucurbit Diseases and Pests: Second : $ Use alone for: Alternaria leaf spot Use in alternation or tank mix for: Powdery mildew, GSB with Groups 1, 3, and 11 copper (inorganic) OMRIa Kocide, Champ, etc.

M1 – multi-site Very low 0 All cucurbits; contact activity only Use alone for: Alternaria leaf spot, Angular Leaf Spot or combine with maneb (M3). Leaf and Fruit Diseases of Cucurbits I. Diseases Accompanied by Fruit Rots. Alternaria Leaf Spot is caused by the fungus Alternaria cucumerina.

This disease was first reported in Italy in and has been reported in the U.S. since the early s. The fungus severely affects melons and watermelons. Disease Specs Alternaria leaf spot of cucurbits is caused by the fungus Alternaria cucumerina. Cantaloupes and watermelons are most susceptible, but squash, cucumbers, and other cucurbits might be affected.

Plant vigor and fruit quality may be reduced if this disease is not controlled. Anthracnose and Alternaria leaf blight can become problematic in cucurbit crops during long periods of wet, humid weather. Both can cause significant losses if not controlled properly. With the production season quickly approaching, now is a good time to review a few of these important diseases.