Last edited by Memi
Monday, May 18, 2020 | History

2 edition of Gummy stem blight of greenhouse cucumbers found in the catalog.

Gummy stem blight of greenhouse cucumbers

Ontario. Ministry of Agriculture and Food.

Gummy stem blight of greenhouse cucumbers

by Ontario. Ministry of Agriculture and Food.

  • 190 Want to read
  • 36 Currently reading

Published by s.n in S.l .
Written in English


Edition Notes

StatementS.K. Khosla, W.R. Jarvis.
SeriesFactsheet (Ontario. Ministry of Agriculture and Food)
ContributionsKhosla, S.K., Jarvis, W.R.
The Physical Object
Pagination2 p.
ID Numbers
Open LibraryOL21666722M

NEWS HIGHLIGHT. Gummy Stem Blight control “Pristine Fungicide,” from BASF Canada, has received an emergency use label expansion for control of Gummy Stem Blight (Didymella bryoniae) and for suppression of powdery mildew (Podosphaera xanthii) in greenhouse cucumbers.. Feb. 23, — “Pristine® Fungicide,” from BASF Canada, has received an . The purpose of this study was to develop a molecular method for rapid diagnosis and identification of Didymella bryoniae, causal agent of gummy stem blight of greenhouse from fungal cultures and from diseased plant tissue was extracted, amplified by PCR using primers specific to septate fungi, and fixed to nylon by:

gummy stem blight on cucumber is second only to those of root knot nematode in North Carolina (St. Amand and Wehner, ). Gummy stem blight is a serious disease of greenhouse cucumber in The Netherlands, where it causes fruit rot (black rot) (Punithalingam and Holliday, ; Van Steekelenburg, a). Cucumber plants mayFile Size: 43KB. (cantaloupe), cucumber, and watermelon are most commonly affected by this phase of the disease. Black rot refers to the same disease on fruit; it is seen less often than the foliar phase. SymptomS and SIgnS Gummy stem blight Symptoms of gummy stem blight can vary somewhat depending upon the host. When emerging seedlings are infected, darkened.

Gummy Stem Blight is a cucurbit-rot disease caused by the fungal plant pathogen Didymella bryoniae (anamorph Phoma cucurbitacearum). Gummy Stem Blight can affect a host at any stage of growth in its development and affects all parts of the host including leaves, stems and fruits. Symptoms generally consist of circular dark tan lesions that blight the leaf, water soaked leaves, stem . Didymella bryoniae Black rot is the fruit rot phase of the gummy stem blight pathogen, Didymella bryoniae (Phoma cucurbitacaerum). It is characterized by a distinctive black decay of the fruits of all cucurbits. In temperate regions, the disease occurs mainly on winter squash, pumpkin, and greenhouse cucumber.


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Gummy stem blight of greenhouse cucumbers by Ontario. Ministry of Agriculture and Food. Download PDF EPUB FB2

Labels related to the pest - Gummy Stem Blight. Toggle navigation. Gummy Stem Blight. of Greenhouse Cucumber March, Gummy stem blight (GSB) is caused by the fungus Didymella bryoniae, previously known as Mycosphaerella melonis.

The fungus is known to infect cucurbits, including cucumber, pumpkin, squash, watermelon, cantaloupe and many others. Gummy stem blight causes ovate stem and vine cankers, usually starting near the nodes, with a characteristic brown gummy exudate. Within advanced lesions on dead tissue, small black fungal fruiting bodies, known as pycnidia, can be seen with a 10x hand lens (Figure 2).Author: Lina Quesada-Ocampo.

Gummy stem blight is a chronically occurring fungal disease that affects greenhouse cucumbers worldwide. It is caused by the fungus, Didymella bryoniae, which attacks all parts of the plant and can cause severe economic losses.

Gummy stem blight was first reported in in France, Italy, and the United States. It affects the leaves, stems, and fruits of all cucurbits. On fruit the disease is known as black rot. The disease has become increasingly severe as fungicide usage and genetic resistance have resulted in the effective control of other cucurbit diseases.

Gummy stem blight can occur on seedlings of watermelon, muskmelon, and other cucurbits grown in greenhouses for use as transplants (11,15). A large, water-soaked Gummy stem blight of greenhouse cucumbers book at the point on the hypocotyl where the cotyledons attach is a typical initial symptom.

If these plants are transplanted in the field and survive. Common Name. Cucumber gummy stem blight, gummy stem blight of cucurbits.

See also Watermelon gummy stem blight (Fact Sheet no. 07).Scientific Name. Didymella bryoniae; also known by the asexual state as Phoma cucurbitacearum or Ascochyta later is commonly found on plants in the field producing minute oval spores in round black structures.

that can be problems in greenhouse cucumbers in Florida include gummy stem blight, gray mold, downy mildew, powdery mildew, cucumber mosaic, watermelon mosaic, and Pythium root rot in NFT. Growers must determine the levels of resistance or tolerance in the cultivars considered for production.

Selection of a resistant cultivar may be the. Gummy Stem Blight. Gummy stem blight infects cukes at all stages. It affects an entire vine except the roots. On young seedlings, it surfaces with brown leaf spots. Older vines have yellowing leaf margins followed by brown leaf spots and fruit with mushy, sunken areas that ooze sticky black fluid when pressed.

Phytophthora Blight. Gummy stem blight Leaf blights Alternaria leaf blight Ulocladium leaf spot Leaf rot (pink mold rot) Penicillium stem rot Powdery mildew Scab (gummosis) Verticillium wilt White mold (sclerotinia stem rot) Viral diseases Beet pseudo-yellows Cucumber mosaic Cucumber necrosisFile Size: KB.

Gummy stem blight is a fungal disease of melons, cucumbers and other cucurbits. It is a contagious disease which can spread across a field of fruits. The fungus damages the tissues of the stem at all stages of development. Stem blight treatment must start before you even plant the seeds to be entirely effective.

View the product label for Clearpath from BASF Ag Products. See active ingredients, product application, restrictions, and more. Chemical and Biological Treatments for Control of Gummy Stem Blight of Greenhouse Cucumbers Article (PDF Available) in European Journal of Plant Pathology (5) June with Reads.

Insects: Seedcorn maggots, striped cucumber beetles, cutworms, squash bugs, thrips and aphids. Diseases: Bacterial wilt, powdery mildew, gummy stem blight, alternaria leaf spot, anthracnose, angular leaf spot, phytopthora and several mosaic viruses. Harvest and storage. Harvest once the desired size has been reached.

Harvest pickling cucumbers. Gummy stem blight (vine decline, GSB) Didymella bryoniae. Lesions caused by gummy stem blight on cucumber leaf (smaller lesions; large lesion in center caused by target leaf spot) foliar lesion showing black pycnidia embedded in necrotic tissue on adaxial surface.

Greenhouse cucumbers infected with cucumber mosaic virus. gummy stem blight of greenhouse cucumbers R.S. Utkhede and C.A. Koch Pacific Agri-Food Research Centre, Agriculture and Agri-Food Canada, PO BoxAggasiz, British Columbia.

Gummy stem blight (Didymella bryoniae) is common on greenhouse cucumbers and can be prevented by strict sanitation measures to remove and destroy all plant residue, as well as measures to reduce wetness on leaves.

Cucumber mosaic virus causes leaves to become mottled and distorted and fruit stunted and misshapen. Cucumbers are susceptible to a few different strains of blight. This disease most commonly occurs when conditions are consistently moist for 18 hours or more and temperatures remain between 60 and 90 degrees Fahrenheit for a prolonged amount of time.

Blight spreads quickly once it infects a crop. Gummy stem blight, caused by the fungus Didymella bryoniae as the sexual stage (perithecia giving rise to ascospores) and Phoma cucurbitacearum as the asexual stage (pycnidia producing conidia), is a common disease of all major cucurbits and is present wherever they are grown.

Both stages of the pathogen can occur on infected tissue during the season, but they vary in. Greenhouse, detached-leaf, and field testing methods to determine cucumber resistance to gummy stem blight. Journal of American Society for Horticultural Science 5. van Deer Meer, Q. P., J. van Bennekon, and A.

van Der Giessen. Gummy stem blight resistance of cucumbers (Cucumis sativus L.). Euphytica Size: KB. gummy stem blight in greenhouse cucumbers grown using conventional and under organic practices. Since compost teas constitute non-chemical control, they are particularly useful to organic growers who are prohibited from using synthetic chemical pesticides.

A further objective was to determine whether efficacies of compost teas can be aug.Gummy Stem Blight is a warm weather southern disease. It is caused by seed borned fungus Didymella bryoniae. All cucurbits are susceptible, and depending on the weather, stem and leafspotting may occur on young plants, especially in late symptoms are round black, wrinkled spots on young leaves and dark sunken areas on stems.

Gummy stem blight affects cucurbit plants of all ages, but greenhouse-grown seedlings and mature plants are the most susceptible. If the pathogen is present on the seed, on plant debris, or as airborne spores in the greenhouse, symptoms will show up on seedlings with fully expanded cotyledons as the first true leaf is opening.