Pecan Tree Leaf Disease?

« Back to Name that Plant

Date Photo Taken: 05/29/2013
Location: Forest Park, GA
Posted By: thepwrice


This is a picture of what appears to be blister like bumps on the leaves of one of my pecan trees. Is this a disease or fungus? Please advise. Any help would be greatly appreciated.


  1. parityanimal Flower Fanatic says:

    Probably galls that are caused by insects or chemicals that irritate the leaf surface.

    May 31st, 2013 at 9:18 am
  2. Jeffrey Clower Unregistered says:

    We have the same thing on our pecan tree leaves. The Extension Service did not really know for sure, but said it is probably galls. The galls are caused as a result of the feeding of an insect called pecan phylloxera in April. They split open in May and early June releasing aphid-like insects. The galls then dry causing twig dieback and leaf drop. Can cause the loss of pecan crop. They damage tree appearance but rarely kill tree. Most effective control is in spring when eggs hatch and small insects crawl to buds. One or two sprays of Provado 1.6F, Warrior 2.56 and Lorsban 4E…But how do you spray an entire tree???? We haven’t found a way yet.

    May 31st, 2013 at 11:24 pm
  3. jennifer Unregistered says:

    I have something like this on my pecan tree too. I’m in Arkansas. They almost look like some kind of cacoon. But I’ve noticed them on other parts of the tree too. On leaves and on stems, and some where pecans are supposed to grow. And some of them appear to have tiny leaves growing from them. I’ve never seen this before. We do not use chemicals around our yard. But earlier this year the city came out and butchered one side of the trees, cutting all the limbs back to keep them off power lines. I am stumped.

    June 2nd, 2013 at 2:53 pm
  4. jose rendon Unregistered says:

    How do u take care of this fungus galls……

    May 9th, 2014 at 7:26 am
  5. Jason Unregistered says:

    Central la. I have the same how do you get rid of if an how to prevent

    May 20th, 2014 at 4:14 pm
  6. shamalama Registered says:

    Metro Atlanta here. Same situation. Evey year around May. From the lowest branches to as far as I can see.

    Other websites say, “They can be created by fungi, bacteria, mites or nematodes, but most are caused by insects. Surprisingly, they don’t seem to have much impact on the plants. Leaves with galls apparently continue to photosynthesize effectively, while providing shelter for the small larvae.”

    “The pecan leaf phylloxera, a type of aphidlike insect, feeds almost exclusively on the leaves of pecan trees. Small infestations may result in nothing more than minor yellowing or insignificant leaf drop, while major infestations can threaten the health of entire limbs. If the phylloxera attack young shoots and nuts, the tree might not produce nuts both in the current and following year.”

    “Fortunately, this looks worse than what it is, and it rarely causes serious problems for the pecan tree. Once the galls appear, it is too late to control pecan phylloxera for the season. However, in most cases it is not necessary to be concerned, since they usually do not cause enough damage to pecan trees to warrant an insecticide application. Spraying large backyard trees is usually not practical in any case.”

    May 25th, 2014 at 8:20 am
  7. Jerry Henson Unregistered says:

    I also have these on my pecan tree leaves. I’m in Canton Ga., just north of Atlanta. They started early on as small round green bumps, a little wider than an English pea, with one per leaf early on. Later this summer (late June and early July) on the underside of the leaf, these became fuller, more rounded and split open on the end, similar to the way a pecan hull or covering splits open when it’s time for the nut to fall out. The texture becomes woody (like the outer covering the pecans drop out of), only much smaller.)I have never seen what dropped out of them, they are all empty. Now (early August), I have this white spittle like substance near the base of where the leaf stems join together on the limbs. I’m too am stumped.

    August 6th, 2014 at 7:26 pm
  8. Myra Patterson Unregistered says:

    I have the same problem with my pecan trees.After the white balls form in the spring there will be no pecans.I live in north Al. and have had no pecans for five years, before the disease hit we had great crops.

    January 29th, 2015 at 4:07 pm
  9. ray soileau Unregistered says:

    never had this problem until 2 weeks ago inotice it and took one of this little ball and found a little worm in it white with a black head.

    May 17th, 2015 at 11:08 pm
  10. Mary Repine Unregistered says:

    I seem to have lost any production on my trees in the past 3 years. 2011 & 2012 so many I couldn’t pick them all up. Now no production. Has anyone found a way to rid the trees and how early do you start the treatment?

    May 23rd, 2015 at 2:08 pm
  11. myra Unregistered says:

    I put a once a-year-year insecticidal drench w/merit,around my trees (i have three mature trees).I put the first qt. in Fed. the next one in late March just when bud started ti show, the next when the leaves & bloom was on. now this is a once a year drench,i have more knots that the bugs hatch out of than i did before. So good luck with what ever you try.

    May 24th, 2015 at 2:41 pm
  12. Gary Unregistered says:

    I have these on my pecan trees in the panhandle of Texas. I have opened some of them up and there is a tiny larvae inside, about 1/8″ long and about as big around as a straight pen. I will spray my trees next year in early spring with an insecticide that is suggested by my local nursery. They don’t seem to be harming my trees too much, except the fact that I notice them on some of the leaves.

    August 30th, 2015 at 6:42 pm

Leave a Reply