Answer: Two problems come to mind - a fungal disease and an insect called bud worm. Remove one of the flower buds and cut it in half. Look for a small worm or for damaged petals. If you find none, a fungal disease is probably the culprit. You can use a copper based fungicide, according to label directions. Budworms are difficult to control. The adults fly to the flower bud, lay and egg and then leave. The worms are protected inside the bud so pesticides won't control them. You might inspect each unopened flower bud for a small hole. If you find one, pick off the bud and destroy it. This will help keep the next generation from laying eggs on the flower buds.
Q&A Library Searching Tips