Ask a Question
Notify Me On Question Update
Email this Question
My raspberries and red and very sweet and now I have found thread-like worms on the fruit (about 2-4 in a bowl) when washing. What are they and how do I treat the fruits? They are black or grayish and threadlike and about 1/ to 2/3 of an inch long.
Rate This FAQ
It sounds like you might have the western raspberry fruitworm, but it is hard to know for sure without a sample. This is a beetle. The adults will feed on the leaves in spring and lay eggs on the fruit. The larvae feed within the developing fruit for 5-6 weeks, and are especially noticed at harvest. The larvae, however, are whitish and only about 1/3-inch long. The larvae then drop to the ground to overwinter as pupae in the soil. Treatment is targeted at the period of egg hatch, just at pre-bloom and again post bloom, if necessary. Spinosad is an excellent, safe product to use, but carbaryl and malathion will also work.
These larvae can be washed out, as you have done, and they are also killed in the canning or freezing process.
If possible, please bring a sample of the damaged fruit as well as the larvae to your local Extension office, and they can send the sample to the Utah Plant Pest Diagnostic Lab. Or, you can visit the Web site for forms and mailing instructions: www.utahpests.usu.edu/uppdl. This way, we will be recommending the right treatment for the right pest.
Submit Your Suggestion
Other Questions In This Topic
- We have a deck that holds a raised hot tub about 3 - 4 feet off the ground (it's on a wood stand). Unfortunatley, bees or wasps (not sure which) have decided to use the insulation underneath the hot tub as their home. Help! I have elementary age kids that are always outside. How do I get rid of them?
- We planted linden trees this year and wrapped the trunks with white corrugated tubing to prevent sun scald in the winter. In looking at leaf damage on the outside border of the leaves, I noted that there were literally hundreds of small gray/black flying insects clustered under the tree wrap. What might they be and are they responsible for the chewed leaves? What treatment is needed?
- I have a house in Kanab with a lot of Desert Poppies and Blue Flax Grass that is pretty tall surrounded by Junipers in the front yard. I think I may have Noseeums. If so how do I get rid of them? I got bit up pretty bad last weekend working in the yard.
- I came up the stairs this morning, thinking there was a wad of cat hair...Ohhh was I wrong! It was a beetle almost 3" long! HUGE! Scared me to death! WHAT is it??? I have pictures of it along side a ruler. Brownish...legs were quite 'barbed'. Big antenae. Ewww.
- I am interested in beekeeping, and am currently reading several books on the subject. All of the books have said, "contact your local extension office to find out about apiary organizations and to register your hives." I've looked all over your site and can't find anything on this subject for Washington County. Where can I find information on apiary organizations in this area?
- We have flying, black bugs with orange/red spots by the eyes. They are all over our year old peach trees. Do you have any idea what they could be and how we can get rid of them?
- We have lots of large, brown, fat beetles around our house this year. Any idea what they are, and if they are a problem for our plants and flowers?
- I have a young peach tree that has a bug on it I can't identify. It's a flying beetle type insect...black wings and red head. There isn't any fruit on the tree of course. The bugs are on the leaves but don't seem to be eating the leaves. They fly around the tree and are not constantly there. They seem to come and go. Any ideas?