Cry endotoxins obtained from Bacillus thuringiensis are effective against
mosquitoes
flies
nematodes
boll worms
Correct answer: boll worms
Solution
Cry endotoxins from Bacillus thuringiensis are insecticidal proteins used to control lepidopteran pests. Bollworms are a classic target because they damage cotton and are susceptible to Bt toxins.