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Old 10/01/06, 04:52 PM
Join Date: Jul 2005
Location: texas
Posts: 31
Sick Plum Tree

My plum tree of 15yrs is sick ... Her limbs have a grey fungus and she has 2 limbs almost dead she is also ooozing sap.. Hope someone can help...
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Old 10/01/06, 09:26 PM
Join Date: Nov 2005
Location: Central Ohio
Posts: 514
Sounds like Brown Rot. Read this and see if it fits what's happening. It has prevention tips too.


A. Brown Rot:

Brown rot, caused by the fungus Monilinia fructicola, is the most common and destructive disease of plum in Connecticut and New England. The disease is especially severe in wet, humid weather. Brown rot causes blossom blights, twig blights, twig cankers, and fruit rots. Infected blossoms wilt, shrivel, and die, becoming covered with a grayish mold. Infection can then spread to the twig and form a brownish, oval canker. These cankers can expand and eventually girdle the twig, causing the terminal growth to wither and die. On fruit, symptoms first appear as small, circular, brown spots that increase rapidly in size and eventually result in a soft rot of the entire fruit. Under wet, humid conditions, ash-gray, powdery tufts appear all over the surface of the fruit, a characteristic diagnostic symptom of this disease. Fruit decay is often not apparent on immature fruit but becomes obvious as fruit begin to ripen. Fruit that are wounded (by insects, mechanical injury, bird pecks, etc.) are more readily infected than unwounded fruit. Rotted fruit may fall to the ground or persist as mummies on the tree. The fungus overwinters in fruit mummies on the tree or ground and in twig cankers. In spring, the fungus produces two types of spores; one type is produced on the surface of cankers and mummied fruit on the tree and the other type is produced in mummied fruit on the ground. Both spore types can cause infection under warm, moist conditions.

Sanitation is essential to control of brown rot. Any mummied fruit that remain on the tree should be removed and destroyed and all dead and/or cankered twigs should be pruned and removed from the vicinity of the tree or planting. In addition, all mummied fruit on the ground should be raked and removed and/or the ground beneath the tree cultivated to prevent spores from forming on the mummies in the spring. In conjunction with this sanitation program, a season-long fungicide spray program is usually necessary for effective brown rot control. Properly selected and timed fungicide applications should be made to protect blossoms, foliage, and fruit throughout the growing season. Plum fruit are very sensitive to brown rot for the first few weeks after setting, so the shuck-split and first cover sprays are very important (refer to Spray Guide below). At harvest, care should be taken to avoid bruises, punctures, or tears in the skin of mature fruit to prevent sites for potential infection. Additionally, use only clean containers and cool the fruit as soon as possible.
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Old 10/02/06, 12:18 PM
keep it simple and honest
Join Date: Dec 2002
Location: NE PA
Posts: 2,607
brown rot

I have brown rot on my plums, but it has only affected the fruit so far. To reduce that problem, I thin the fruit in the spring, making sure that fruits do not touch each other. This has helped me get a crop from the trees, although many fruits still are ruined by the disease.
My suggestion for you would be to plant some new trees next year, a bit away from the currently infected ones.
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