Russian Olive Tree Disease

The latin name of this tree is elaeagnus angustifolia and although it looks very similar to the common olive tree they belong to different plant families. Olive knot olive knot is a bacterial disease that is spread by water and enters the tree through pruning cuts cracks or wounds on the tree. Keeping olive trees well fed and adequately watered is the best initial defence against pests and diseases since vigorous trees are better able to withstand attack and less likely to suffer long term damage.

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The diseases of elaeagnus leaf spots.

Russian olive tree disease. When the infection is considerable the weakening of the tree is widespread with dry branches and a significant reduction in production. Several fungi cause leaf spots on russian olive but are not serious enough to warrant chemical control. Its name comes from its native region southern russia and the resemblance to the olive tree around the mediterranean. They are merely a clue that something more is wrong.

One of the most serious diseases of russian olive is a canker and dieback caused by the fungus phomopsis elaeagni formerly called fusicoccum elaeagni. Cankers occur on a great deal of the woody plantmaterial we see at the plant clinic. This disease is now very common in the midwest and ea st. Verticillium wilt is a.

The russian olive elaeagnus angustifolia is a small tree or shrub prized for its silver gray foliage and its tolerance of adverse climatic condition s. Name elaeagnus angustifolia family elaeagnaceae type shrub. The russian olive tree as opposed to the native american silverberry is considered a highly invasive species in some parts of the united states and canada. Cankers are generally caused by secondary or stress pathogens and are only a part of the problem.

Olive knot is a olive tree disease of bacterial origin. Several fungal pathogens occasionally cause leaf spots on oleaster shrubs and russian olive trees but. Usually only the branch tip is affected. It is believed that stress is a component and that gummosis is an indication of root dysfunction.

Height 6 to 13 feet 2 to 4 meters exposure full sun part sun soil ordinary. Treatment of pests and diseases are always more successful when done in the earliest stage of. The bacterium pseudomonas savastanoi janse 1982 infects wounds in the tree. Once pests are identified ask garden centre staff to recommend suitable control products.

Galls up to 2 inches in diameter appear on the tree. Getting rid of russian olive is labor intensive but quite easy. Russian olive is a beautiful shrub. This root related stress may come from many sources including disease or adverse environmental conditions such as drought and sometimes signs of canker diseases can be found in trees exuding gum but this is not always the case.

Russian olive trees are somewhat susceptible to canker disease pathogens phomopsis arnoldiae that thrive in. Several canker diseases attack the branches and trunk particularly in the humid east. The leaves on infected branches turn brown and persist on the tree. The causes of gummosis on russian olive are unknown.