Peach Tree - Knowledgebase Question

Rockwell City, IA
Question by hannah_monta
August 21, 2006
Our peach tree had peach leaf curl. We sprayed the area with an insect killer. The leaves on the portion that we sprayed turned brown but the top is green and flourishing. I?ve found articles about the peach leaf curl and I think I understand that but we have gobs of jell a sticky sort of stuff coming out of the trunk and branches. Can you tell me what that is and if we need to do something?


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Answer from NGA
August 21, 2006

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If you've read about Peach Leaf Curl, then you know it is caused by a fungus. A fungus is a disease so insect killer won't affect it, but it might adversely affect the leaves on your tree. I guess you found that out after you sprayed your tree. You may have to put your tree on an annual spray program to keep it from developing Peach Leaf Curl again. (Be sure to read and follow the label directions.)

The oozing sap may be signs of boring insect (Peach Tree Borer), or it could be a disease. External evidence of peach tree borer tunneling is a wet spot on the bark or the presence of oozing, gummy sap. The sap is clear or translucent and often dark from the sawdust-like excrement of the insect. Most injuries occur along the lower trunk beneath the soil line. Lower branches rarely receive injuries. Oozing wounds on peach that produce an amber-colored gum may be caused by cytospora canker, a fungus disease often confused with peach tree borer. The Cytospora fungus attacks trees or parts of trees that are injured or in a weak or stressed condition. It can cause their death. Trees affected by drought, Insects, defoliation by fungi, sunscald, herbicides, or mechanical injury are susceptible to cytospora infection.

You'll need to determine which of these problems might be affecting your tree before you can take control measure.

Best wishes with your peach tree.

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