Final answer:
Sensitive pesticide application sites are considered such due to potential harm to non-target organisms and the environment, with developing countries facing greater risks due to weaker regulations. Biological control methods serve as an alternative, reducing the use of harmful pesticides and mitigating their impact on these sensitive areas.
Step-by-step explanation:
Some pesticide application sites are considered sensitive because they may harm non-target organisms or the environment. Sensitive sites are areas where the application of pesticides needs to be managed carefully to prevent damage to wildlife, ecological functions, and human health. Ecologically based control measures often aim to minimize the impact of pesticides on these sensitive sites, such as using non-persistent products and applying them in a targeted manner.
Developing countries, where regulatory and health systems are typically weaker, face significant challenges. They are often subject to overuse of pesticides, resulting in higher production costs as well as health issues, including chronic and acute diseases such as non-Hodgkin's lymphoma, leukemia, and neurological symptoms, among others. Furthermore, pests have evolved resistance to pesticides, lessening their effectiveness and necessitating even greater care in sensitive areas.
Biological control, such as the introduction of natural predators or parasites of pests, presents an alternative to chemical pesticides, reducing the need for their use in sensitive sites. This approach has seen successes in controlling pests without the negative impacts of chemical pesticides. However, it's not without risks, as sometimes these biological control agents can attack non-target species and cause ecological imbalances.