bud worms in coreopsis

Question

We have these small worms inside our coreopsis buds eating them from the inside. Have had coreopsis for many years and have never had a problem with pests. Can you tell us what to do about them?

Answer 1

This article should help, though it's directed to roses it would still apply to your situation as well: https://www.gardeningknowhow.com/ornamental/flowers/roses/budworms-roses.htm

If it is not budworms but another caterpillar or worm pest attacking your plant, then they can be treated with products containing Bacillus thuringiensis (Bt), a natural bacteria that kill worms without harming plants. Neem oil may be helpful as well. Here is more information: https://www.gardeningknowhow.com/plant-problems/pests/pesticides/using-bacillus-thuringiensis.htm
https://www.gardeningknowhow.com/problems/pests/neem-oil-uses.htm