Ask a Question
Notify Me On Question Update
Email this Question
We have a horrible locust infestation, which I can't find any news about - all of the scrub oak are defoliated. Is this common? Will the trees recover- new leaves this year? I have found them on fruit trees and washed them off - are they just passing through? Any other info on them?
Rate This FAQ
The insect infesting Gamble oak and other trees in northern Utah is the cankerworm. The caterpillars can defoliate the trees when they occur in high numbers such as this year. Most healthy, nonstressed trees will produce a new crop of leaves when the caterpillars have completed their development. For trees in your yard you can spray them with a bacterial insecticide that is specific for caterpillars and nontoxic to mammals.
Products available include those with the active ingedient Bacillus thuringiensis (Dipel, Thuricide, others) and spinosad (Success, Entrust, Conserve). Thorough cov erage of leaves is important because the caterpillars must ingest the insecticide for activity.
Submit Your Suggestion
Other Questions In This Topic
- A large branch has died on my apple tree. What could have killed it?
- When I first moved here, my peach tree was unhealthy and barely alive. With regular irrigation from the water that comes down from Cedar Breaks National Monument and all the minerals, it has become very healthy with good fruit. Now it looks like it used to - fruit, but hardly any leaves. Could it be the drastic changes in weather one week in April after Easter - 75 degrees one day, gale force winds the next, then freezing rain and snow, all during bloom time?
- We are trying to revive some neglected apple trees that were pretty dried out. We forked up some of the dead grass and sprinkled for a few hours. But the leaves are curled along their axis like a hark cor taco instead of being their normal flat like a tostada selves. Is this a result of too much water, not enough, insects or what?
- I just found black spots on some of the peaches on my peach tree. I cut one peach open and the pit split in half really easily and there were small redish and black spots in the pit. I was wondering what are they, and if there's anything I can do about it?
- Is there a variety of Nectarine which will grow well here in northern Utah? Can I grow just one tree? Is it okay to grow it near a peach tree or will they cross-pollinate and cause problems? Do they have the same risk of disease as peaches do?
- I had my apple tree pruned this spring and ever since then apple suckers have been coming up all over my yard; especially in my grass. Nothing I've sprayed seems to kill off the suckers, including round-up and sucker stopper. What do you recommend to erradicate apple suckers?
- I have a peach tree that I want to save - it's almost completely dead because of borers. There are some healthy branches on it still, and I'm wondering about the possibility of grafting some of this stock onto another peach tree I have. Where can I find out how to do this?
- Our family has a huge peach orchard and this year we have been having the pit of the peach split in half when you open it and it looks like another "seed" is trying to grow in the middle of it. What is causing this and how do you fix it?