The preferred hosts of E. tracheiphila are in the cucurbit family (wild and cultivated species), of which cucumbers are “the most susceptible host, followed by. Erwinia tracheiphila is the causal agent of bacterial wilt of cucurbits, an economically important phytopathogen affecting few cultivated. E. tracheiphila induces severe wilting symptoms in many wild and cultivated cucurbits, especially cucumber (Cucumis sativa) and musk melon (Cucumis melo ).

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A diagnostic procedure for determining bacterial wilt Latin, is to cut the stem, bring the two cut pieces back together and slowly pull apart. The impact of bacterial wilt in more tolerant cucurbits is tracheiphia less Brust, b. Close Find out more.

Sticky strand test on cut stems, with bacterial slime streaming from xylem tissues.

Erwinia tracheiphila. [Descriptions of Fungi and Bacteria].

Wilted runners will appear dark green at first before becoming necrotic as the wilting becomes irreversible. Because of differential host preferences by striped cucumber beetles, commercial cantaloupe cultivars were found to vary significantly in susceptibility to beetle feeding, and subsequently bacterial infection Brust and Rane, However, since wilt-resistant plants have not yet been developed, the most effective way to prevent the disease is to keep beetle populations at a minimum.

Hoffmann from the Compendium of Cucurbit Diseases. The bacterium is transmitted mechanically by contact with contaminated mouthparts and does not reproduce within the beetle. While various methods of beetle control have been tested, the most effective preventative measure is to keep beetle populations as low as possible through careful field monitoring and insecticide sprays. No resistance has been identified in melon.


Back to top Cucurbits, Bacterial Wilt. However, the disease will soon spread down the runner and then infect the whole plant, causing it to shrivel and die. Wilt is most severe early in the season when the plants are rapidly growing. For Mac, click the only mouse button and follow the same steps. Bacterial wilt caused by Erwinia tracheiphila is a serious threat to commercial cucumber and melon production and is rapidly becoming more important in pumpkin and squash cultivation.

Cucumber and melon plants are severely affected; individual runners or whole plants wilt and die rapidly. Enterobacteriaceae Bacterial plant pathogens and diseases Eudicot diseases.

Plant Disease Management Reports. Erwinia tracheiphila Smith Bergey et al. Bacterial wilt is caused by the bacterium Erwinia tracheiphila. Resistant cultivars of cucumber are being developed. Weather has little effect on the incidence of wilt, but may influence the rate of symptom expression. Some cucurbit cultivars are less susceptible than others, so it is beneficial to plant these cultivars.

The pathogen overwinters in the digestive tracts of the spotted and striped cucumber beetles. Because this bacterium is transmitted systemically, copper tracheiphilz are of no value. Foliage appears yellow before the entire plant collapses and dies.

Others such as, Erwinka et al. The presence of the E. Bacteria spread throughout the plant through adjacent xylem vessels. Field cucumber beetle populations were suppressed significantly following vermicompost treatments.


Cucumber Beetle, Striped Tracheiphi,a that are affected by this disease: The first symptoms consist of dull-green patches that become progressively flaccid in sunny weather.

If the stem is cut near the crown and the ends are slowly pulled apart, the sap should form a viscous string. Careers In Plant Pathology.

Insects that can vector or affect this disease: Although severity of bacterial wilt varies seasonally and among fields, it has caused nearly complete crop failures, especially in cucumber and musk melon Rand and Enlows, ; Sherf and MacNab, Views Read Edit View history. The expression of symptoms varies with the different crop species.

Bacterial wilt is a disease of the vascular tissue.

Cucurbits, Bacterial Wilt

Continuing to use www. Bacterial wilt Erwinia tracheiphila. Initially, wilting may be confined to a portion of a leaf but eventually spreads throughout the entire leaf, to other leaves on a branch and subsequently throughout the plant Walker, North Rtacheiphila Amphibian Monitoring Program. Masses of bacteria, gums, and resin plug the vascular system, resulting in wilt. For PC, position your mouse cursor on the featured image, click the right mouse button, and choose “Save Picture As Erwinia tracheiphila Bacterial wilt of cucurbits From Bugwoodwiki.