Final answer:
It is advised not to use a duster for multiple pesticides due to the risk of contamination and unforeseen environmental or health impacts, making the answer 'True'. Proper pesticide application methods are crucial for minimizing ecosystem disruption.
Step-by-step explanation:
Once a duster has been used for a given pesticide, it is generally recommended that it should not be used to apply another pesticide. This is because residue from the first pesticide could contaminate the second, potentially causing unforeseen effects on the targeted plants or pests, and could even be harmful to the environment or human health. Therefore, the answer to the question is True.
In terms of pesticides and their impact on ecosystems, certain pesticides, like those that can harm bees, can disrupt pollination and affect the balance of the ecosystem. This underlines the importance of applying pesticides in a manner that minimizes environmental disruption, prioritizing approaches that are targeted and utilize non-persistent products. Practices include applying pesticides only on necessary areas, such as parts of a plant's stem to protect natural predators of pests.
Understanding the history of pesticide use, such as the transition from arsenic-based pesticides to organophosphates and carbamates, and now more commonly to pyrethrin compounds, also highlights the evolution of pesticide application with an increasing focus on reducing environmental and health risks.