Ask a Question
Notify Me On Question Update
Email this Question
When do I spray my cherry tree to prevent worms?
Rate This FAQ
The best thing to do is to check the USU Fruit Tree IPM(Integrated Pest Management) Advisories that are emailed weekly to subscribers, or you can check online.
To check advisories go to http://utahpests.usu.edu/ipm/htm/advisories/treefruit
To subscribe go to http://utahpests.usu.edu/ipm/htm/subscriptions
As of May 6th advisory, the degree day accumulations in Salt Lake are 500 & 517. See next excerpt:
The timing of your spray depends on the development
of the fruit. We usually recommend starting applications at
1060 degree days after March 1 (base 41). However, the flies
cannot penetrate the skin of the cherry to lay eggs until the
cherry has developed a salmon-blush color. So use that guideline
for when to start spraying. Check the fruits at the top of
the tree and in the sunniest locations as these will color up
This excerpt came from last year (20080 advisory, go to http://utahpests.usu.edu/ipm/files/uploads/AdvisoryUpdates/Advisory08/Fruit-IPM-05-28-08.pdf to see photo of cherry fruit appearance for timing of spray.
So as temperatures go up and degree days accumulate, you'll want to spray at total of 1060, and advisories have that information weekly.
Submit Your Suggestion
Other Questions In This Topic
- My backyard has far too much grass. I'd like to turn a fairly large portion of the lawn into waterwise beds and also expand my backyard vegetable garden. Two years ago, I made some beds by removing the turf. However, it is not only very hard work but it also results in a large amount of excess sod, and takes a good amount of topsoil with it. It also seems wasteful to send it to a landfill. Is there a way to kill the grass without herbicides? For example, will covering it with black plastic be an effective way to kill the grass? If so, how long will it be before I can plant in the new beds?
- I have an 11 year old sugar maple. For the past few years the leaves have been getting more and more yellow. I bought an iron product, read the directions, and sprinkled it around the base. Instead of turning green the leaves are still yellow and small brown spots all over them. Help!
- I have several burning bushes and every year they start out great in the spring but later spring the leaves turn yellow, I have been adding iron to the soil around them and it seems to help a bit but it still happens every year. Could it be something else?
- I have a Blierana flowering plum tree that failed to leaf out fully this spring. I looked at it yesterday and found at least fifty places on the branches where a snake-like resin/sap has been pushed out of the branch. Is this a borer doing damage? What do I do? Should I remove the tree to prevent further damage to surrounding trees? Is there something I can spray? Can I ever plant a tree in this same spot? I have trees all along my fence line in a row and really need a replacement tree if this one is going to die.
- JUST SENT A EMAIL, I GUESS I CAN'T ATTACH A PICTURE OF THE TREE I'M AKING ABOUT, HOW CAN I SEND YOU A PICTURE OF IT? I DON'T KNOW WHAT KIND OF TREES THESE ARE.
- We would like to remove the lawn from a large area around some 40-50 ft pine trees and cover the area with decorative bark. The roots are close enough to the surface in some areas that using a sod cutter would damage the trees. Would it work to just spray the grass with a killer, such as Roundup, and then put the bark directly on the dead grass? Would this affect the trees in the areas of the partially exposed roots? Any other suggestions?
- Can an olive tree survive in Utah?
- I would like to prune my lilac bush. What is the best time of year to do so and how much can be cut back and not harm the bush?