Acidovorax citrulli ZJU (b-proteobacteria) genome assembly Acidovorax avenae subsp. citrulli from Institute of Biotechnology [GCA_ Bacterial fruit blotch is caused by Acidovorax avenae subsp. citrulli. The disease was first detected in Florida in and was subsequently detected in South. Acidovorax citrulli is the causal agent of bacterial fruit blotch and seedling blight Synomyms: Acidovorax avenae subsp. citrulli, Pseudomonas.

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Fitopatologia Brasileira, 32 3: Plant Disease, 81 6: Australian Journal of Experimental Agriculture, 39 4: Citron Citrullus lanatus var.

Alternative hosts can also serve as the source of inoculum in cucurbit fields. The bacterium invades the fruit through stomata on the fruit surface.

The American Phytopathological Society, St. Longevity of the pathogen decreased with increasing storage temperature.

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Fermentation for hours plus treatment with HCl was most effective in eliminating seed transmission. There have been many other attempts to develop seed treatments for BFB. Many seed subs.citrulli have been reported to reduce BFB seedling transmission. Integrated pest management of bacterial fruit blotch of cucurbits.

Kawano T; Takahashi Y, Infected seeds and seedlings are the most important primary sources of inoculum in commercial fruit production field. First report of seedling blight of watermelon caused by Acidovorax citrulli susbp.citrulli from rootstock of pumpkin in China.

Cultural Control and Sanitary Methods Cultural practices in the transplant house should include minimal manipulation of plants; decontamination of hands, plant containers, and tools after contact with plants; closing sides aubsp.citrulli the transplant house during storms or windy periods; and destroying discarded plant material. Control of watermelon fruit blotch by seed heat treatment.


Plant seeds that have been tested for the presence of the fruit blotch bacterium.

Much of the watermelon production in the USA is still from direct-seeded plants, but transplants are rapidly gaining in popularity. The characteristic symptom of bacterial fruit blotch in watermelon is a dark, olive-green blotch on the upper surface of infected fruit that begins as a small, water-soaked area a few millimetres in diameter and rapidly enlarges to a lesion several centimetres in diameter with irregular margins Somodi et al.

Colonization of female watermelon blossoms by Acidovorax avenae spp. International Journal of Acidovorxx Bacteriology, 41 4: First report of bacterial wvenae blotch of watermelon in Texas. While fruit infection is initiated at anthesis, fruit symptoms do not develop until harvest maturity. The lesions in honeydew are usually mm in diameter. Other methods Methods of seed detection of A. Spread of bacterial fruit blotch of watermelon in the greenhouse.

Bacterial fruit blotch caused by Acidovorax avenae subsp. This infection court is accessible for weeks after anthesis, and as fruits mature, wax becomes deposited over the stomata preventing further bacterial entry.

IMS yielded a fold increase in recovery of A. Description Top of page A.

Acidovorax citrulli (fruit blotch)

Resistance of watermelon seedlings and fruit to the fruit blotch bacterium. The most susceptible fruit are those with a light green rind, more tolerant are those with light and dark-green stripes and most tolerant are those with a solid dark-green rind Hopkins et al.

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Triploid watermelons are less susceptible to A.

Irrigation with an overhead boom may result in splash dispersal of the bacteria throughout the greenhouse. Decontaminate irrigation or mechanical equipment before moving it from an infested field to a noninfested field. Development of serological detection technique for bacterial fruit blotch Acidovorax avenae subsp. Inspect cucurbit transplants for small, dark brown lesions, often surrounded by acidovotax band of chlorotic tissue.

The data indicate that watermelon blossoms are a potential site of ingress for fruit and seed infestation by A. Infested seeds are normally the primary source of inoculum, and secondary spread of bacteria is due to the splash-dispersal facilitated by overhead irrigation that generates bacterial aerosols. Seed Science and Technology, 34 1: A detailed step-by-step description of the Seminis Inc. Alternative hosts can also serve as the source of inoculum into cucurbit fields. Distribution Maps of Plant Diseases, No.

It was also demonstrated an increase subsp.cihrulli spatial spread of BFB in the greenhouse subsp.citgulli increase in A.

Wet seed treatment with peroxyacetic acid for the control of bacterial fruit blotch and other seedborne diseases of watermelon.