Ask Ed: Grow Questions and Answers – Caterpillars!

Question: I have some good looking bud that is close to maturation. My problem is that there are little worms in the bud and they have been eating it, causing it to rot. What can I do to get them off and stop the bud rot?


Ed Rosenthal: The little “worms” are really small caterpillars that are having a feast at your expense. As you realize, it is essential to get rid of them. There are several things that you can do:

The first is to use their natural enemy: bacillus thuringiensis, a bacteria specific to these insects. It is perfectly safe for you and your pets. There are several brands available, one that is widely used is called Dipel.

Another choice is pyrethrum, a compound made and used by chrysanthemum plants to fend off insects. It is safe for warm-blooded animals but should not be used around fish and reptiles.

The third possibility is a product I developed and manufacture called Zero Tolerance made from natural plant oils that will both kill the insects and dry up and kill the fungus that the caterpillars have spread. All three of these suggestions are safe to use on edibles, ingestibles and smokables.

Send your grow questions to Ed Rosenthal at [email protected].


1 Comment

  1. Anonymous on

    i have a 4x4x6.6 foot darkroom with a 400wt light and need to know what i need to get for the exhaust system do i get a can fan with a crabon filter do i need a fan bring air in and one takeing air out i need your help thanks