I know it is best to pick them off, but the leyland cypress trees are getting too tall, what are my options?
New Castle County Delaware
To be clear, I assume you mean the bag worms that are in separate cases/their own individual bags. As long as they are still feeding, you can use a systemic insecticide which you apply and water into the ground. Be sure it is labeled for bag worms and follow the directions carefully. Good luck!