I want to know the answer to the following question:
On what did a 2009 study conclude that increased insects were dependent?
All the background I'm provided with is that "cotton farming in China found that after seven years these secondary pests that were normally controlled by pesticide had increased, necessitating the use of pesticides at similar levels to non-Bt cotton and causing less profit for farmers because of the extra expense of GM seeds.". Is that enough to answer the question?
Answer: no