Phytophthora fungi are present in almost all citrus orchards. Under moist conditions, the fungi produce large numbers of motile zoospores, which are splashed. The main symptom of citrus gummosis is oozing of gum from the affected parts on the trunk. Infected bark remains firm with small, longitudinal cracks through. Gummosis is the formation of patches of a gummy substance on the surface of certain plants, particularly fruit trees. This occurs when sap oozes from wounds or .

Author: Kigataxe Voodootaur
Country: Liberia
Language: English (Spanish)
Genre: Technology
Published (Last): 25 April 2007
Pages: 141
PDF File Size: 2.31 Mb
ePub File Size: 17.14 Mb
ISBN: 799-3-30955-542-1
Downloads: 1355
Price: Free* [*Free Regsitration Required]
Uploader: Tagul

Sweet orange tree more than half girdled by a Phytophthora lesion at the base of the tree. This notice hereby grants permission to APS users to copy the image featured for noncommercial, personal use.

Branches with this symptom resulted in die back of a tree that could not keep their fruits and leaves alive for the next season.

UC IPM: UC Management Guidelines for Phytophthora Gummosis on Citrus

This is to ensure that we give you the best experience possible. Is gummosis becoming more of a problem? New bark will eventually begin to grow around the wound. The best control for this disease is prevention. Lesions may spread around the circumference of the trunk slowly girdling the tree. The outbreak of this disease citrue be the variation in environmental factors and changes in citrus cultural practices. Swingle citrumelo is the most tolerant rootstock.

The fungus attacks and kills the bark gimmosis will not penetrate into the wood. CRC for tropical plant protection Brisbane Austrialia. The disease usually attacks the plant when soil comes into contact with the scion, or when a tree is planted in a basin which may be flooded during irrigation, allowing the fungus to reach the scion [ 13 – 15 ].


HaileMariam Phenological regions for citrus production in Ethiopia: Secondary infections often occur through lesions created by Phytophthora.

Disease survey was conducted in ten established gummsis orchards in Upper awash, Errer-Gota, and Koka areas. Hence, there is a need to undertake coordinated and multi-phased research investigations on possible causes of citrus decline and find a sustainable, eco-friendly and easily commercialized technology that fits for our subsistence agriculture system. Pharmaceutical Sciences Journals Ann Jose ankara escort.


Do not plant for at least 3 months. Visit for more related articles at Journal of Horticulture. Recheck frequently for a few months and repeat if necessary. Not all copper compounds are approved for use in organic production; be sure to check individual products. Inject 7—9 inches, 12—18 inches apart, gummosia tarp immediately. Fumigate only as a last resort when other management strategies have not been successful or are not available.

Cracked lesions that exude sap are found on infected scions, which become gradually girdled and killed.

Foot Rot or Gummosis Diseases of Citrus

For PC, position your mouse cursor on the featured image, click the right mouse button, gummoxis choose “Save Picture As Five phenological regions were identified based on the blooming season and climate as potential production centers capable of supplying citrus throughout the year [ 5 ].

Send feedback on this factsheet. Systemic fungicides can control Phytophthora gummosis and copper sprays can be used to protect against infection.


Like most websites we use cookies. This is an open-access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.

Monday, February 27, Citrus Gummosis. The disease mainly affected mature citrus trees; Diseased trees showed cankers and gum exudations mainly on above-union parts, especially on the major limbs, whereas rootstocks generally remained healthy. Always keep the orchard clean.

Trunk – infection of the trunk by Phytophthora results in dark water soaked areas in the area of active infection. This tool is part of the Citrus Resource.

Citrus gummosis of lime

If the trunk remains wet for many hours, whether from rain droplets or irrigation, infection takes place. When establishing a new orchard, carefully check the lower trunk and rootstock of new trees for any symptoms of gummosis before you plant.

Monitor the orchard regularly. Citrus gummosis Recognize the problem An early symptom of gummosis is sap oozing from small cracks in the infected bark, giving the tree a bleeding appearance. Leaf – yellow foliage and shoot die-back.

The disease samples were taken from the active lesion near to the crown and branch showing the symptom of the disease. Hot summer weather slows disease spread and helps drying and healing of the lesions.