Why might a farmer opt for a combination of pesticides?

Choosing a combination of pesticides is often aimed at increasing effectiveness against multiple pests. Different pests may have varying levels of susceptibility to specific pesticides, and using a mix allows for a broader spectrum of control. This approach targets different life stages or resistance mechanisms of the pests, enhancing the likelihood of reducing populations effectively.

Additionally, some pesticides may work synergistically, meaning their combined effect can lead to better control than using each one alone. This is particularly important in agricultural settings where pest pressures can be complex and varied, requiring a more integrated pest management strategy to ensure both effective and sustainable pest control. Thus, using a combination of pesticides is a strategic choice for increasing effectiveness in managing multiple pest species efficiently.