Experts and BHG readers answer.
green fuzzy worm-like insect on my broccoli leaves
The fuzzy worm-like insects (caterpillars) sound like cabbage loopers, or cabbage worms. They are voracious eaters and will chomp their way through the cole crops in your garden, leaving holes in broccoli, cauliflower, cabbage, brussels sprouts. The most effective and safest treatment is Bacillus thuringiensis (Bt), a natural bacteria that attacks caterpillars. It is inexpensive, safe, and available in garden centers.