Worms defoliating Jostaberry - Ask Extension
What larva is this and how can I treat the infestation? Will the fruit ripen and be useable?
Knowledgebase
Worms defoliating Jostaberry #872763
Asked June 12, 2024, 10:11 AM EDT
What larva is this and how can I treat the infestation? Will the fruit ripen and be useable?
Ramsey County Minnesota
Expert Response
I am unable to magnify your photo to see what insect you are referring to. However, most insects do damage specific to a particular part of a plant. These seem to prefer leaves. It shouldn't affect the fruit unless the plant doesn't have enough energy to do so. I am giving you a link to a page about various insects. However, you can purchase an insecticide that is labeled for edibles so the fruit will still be able to be eaten. Read the labell and/or ask for help at your locally owned garden center. You could even bring one of the insects in with you for help in identifying it. https://extension.umn.edu/yard-and-garden-insects/flower-insects
I was referring to a green worm on the top of the leaf edge in the first picture.
Sent from my iPhone
Sent from my iPhone
On Jun 12, 2024, at 3:06 PM, Ask Extension <<personal data hidden>> wrote:
It is still not clear enough to see particulars. It is most probably cankerworms. Although the link refers to trees, they also infest shrubs. Open the drop down box for spring/fall cankerworms. https://extension.umn.edu/yard-and-garden-insects/caterpillars-ornamental-plants
