Is there a spray to get rid of caterpillars on azalea bushes?
Various types of worms can affect garden plants. Those that cannot be picked off 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/prevent-caterpillars.htm