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.
|Published (Last):||24 November 2013|
|PDF File Size:||2.60 Mb|
|ePub File Size:||7.71 Mb|
|Price:||Free* [*Free Regsitration Required]|
Integrated Management of Plant Pests and Diseases [ed. Production of cucurbit crop seed in areas with these alternate hosts of A. There is zero tolerance for contaminated seed and any infested seed lot is rejected. Because a single transplant house may supply plants to several growers over a large geographical area, transplants can be the mechanism through subsp.citruoli the bacterium is dispersed.
Suvsp.citrulli loopful of the suspension is streaked onto nutrient agar, King’s medium B agar and a Tween base agar, such as TC50 Frankle, As disease transmission was observed for seedlots with just one seed acdovorax as few as 10 c. In addition, recently, it was reported that blossom or stigma inoculation resulted primarily in bacterial localization in the seed embryo, whereas pericarp inoculation resulted in bacterial deposition under the seed coat Dutta et al.
Acidovorax avenae subsp. citrulli – Genome – Assembly – NCBI
Standard greenhouse sanitation practices should preclude perennation of the pathogen associated with plastic trays used for watermelon seedling production. When the streaming fluid was streaked onto King’s medium B 3a slow-growing, gram-negative, nonfluorescent bacterium was identified from the whitish colonies that consistently developed on the medium.
Chemical control of bacterial fruit blotch of watermelon. Plant Disease, 98 Although bactericide treatment reduced disease incidence, it did not eradicate the pathogen. Alternatively, young watermelon seedlings can be inoculated by dipping a sterile toothpick into the bacterial colony and puncturing the watermelon hypocotyl with the toothpick.
Bacterial fruit blotch caused by Acidovorax avenae subsp. Numerous secondary infection cycles can take place due to splash dispersal. Bacteria from infested seed infect the developing seedling as the cotyledons emerge from the seed coat.
Acta Phytopathologica Sinica, 31 4: Once the aciovorax layer forms, mature watermelons can be invaded by the bacterium only after wounding. This is a rapid tool for detecting pathogen from leaves, fruit, bacterial cultures, and seedlings exhibiting BFB symptoms.
Acidovorax citrulli (PSDMAC)[Overview]| EPPO Global Database
In the field, BFB development is heavily dependent on rainfall and relative humidity. First report of seedling blight of watermelon caused by Acidovorax citrulli transmitted from rootstock of pumpkin in China.
First report of infection of honeydew with Acidovorax avenae subsp. Florida State Horticultural Society Proceedings, Survival of subsp.ciyrulli watermelon fruit blotch pathogen Acidovorax avenae subsp.
Chemical Control Applications of copper-containing fungicides at the full recommended rates have reduced the incidence of fruit blotch symptoms when applications were initiated prior to fruit set Hopkins, ; Hopkins, Seed Science and Technology, 34 1: Moreover, low concentration and lengthy soaking treatments were far superior to high concentration and short treatments.
However, these reports do not necessarily indicate detection of the pathogen in seeds. Symptoms can be produced in all cucurbits tested by inoculation, especially in the seedling stage Schaad et al.
Based on fatty acid profiles, this weakly aggressive bacterium was most closely related to Acidovorax facilis. It produces restricted lesions on cotyledons in the transplant house, but does not produce symptoms in the field on watermelon leaves and fruit.
To our knowledge, this is the first report that A. Munoz M; Monterroso D, Occurrence of watermelon bacterial fruit acieovorax in Nagano prefecture.
EPPO Global Database
When several references are cited, they may give conflicting information on the status. Plant Disease, 78 8: Symptomatic cotyledon, leaf, or rind tissue is triturated in sterile water. Rotting watermelon fruit often ooze a sticky, clear, amber substance or an effervescent exudate Latin and Hopkins, Please consider upgrading your browser to subsp.ditrulli latest version or installing a new browser.
In CABI was informed by the Ministerio Agropecuario y Forestal, Nicaragua, that the disease was eradicated and the pathogen had not been detected in subsequent plant acidovorac soil tests of the area.
In advanced stages of lesion development, the initial infection site may become necrotic. First report of bacterial fruit blotch on melon caused by Acidovorax citrulli in California. Transmission of the watermelon blotch bacterium avneae infested seed to seedlings.
Fitopatologia Brasileira, 24 2: Control leaves infiltrated with distilled water remained symptomless. Comparing them phenotypically, Willems et al. The characteristic zcidovorax 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.
The watermelon seed industry is currently testing their seed lots by grow-out test of 10, to 50, seedlings per seed lot. Wet seed treatments for the control of bacterial fruit blotch of watermelon.
More information about modern web browsers can be found at http: Fruit blotch of watermelon in Roraima. Alternative hosts can also serve as the subsp.cutrulli of inoculum into cucurbit fields.
Journal of Yunnan Agricultural University, 28 2: Infested seeds axidovorax 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.