Thank you for your question, Ann.  The yellowing of the leaves is an indication that the plant has a nutrient deficiency, probably nitrogen.  Have you fertilized it?  Wilting typically occurs when the plant has inadequate water.  

I suggest that (1) you get an inexpensive water probe to see how much water the plants are getting, and (2) get a soil test for pH and nutrients, and follow the recommendations the lab gives you.  The closest testing lab is this one in Sherwood:  https://al-labs-west.com/

Good luck!

Thank you much!

Welcome!

We are taking steps to deal with a regular fertilization and watering. What can we do about the worm infestation?

On Tuesday, August 6, 2024, 2:56 PM, Ask Extension wrote:

I suspect that your tree doesn't have "worms", but instead what you're seeing is the larval stage of an insect, most commonly a codling moth, described here:  https://ipm.ucanr.edu/agriculture/plum/codling-moth/#gsc.tab=0

But, without an accurate identification of the pest, we can't recommend control strategies.  Can you get a photo of the pest as well as the damage to the fruit?  Thanks!