Which of the following can be indicators of pesticide misapplication?

Unusual pest resurgence can indeed be a key indicator of pesticide misapplication. When pesticides are applied correctly, they should effectively manage pest populations. However, if there is a resurgence of pests after treatment, it may suggest that the pesticides were either ineffective or that there was an inappropriate choice of product for the specific pest problem. This resurgence can occur when pests develop resistance to the applied chemical, leading to a population rebound. Additionally, misapplication can lead to sublethal effects, where some pests survive the treatment and repopulate more quickly than expected.

In contrast, high crop yield indicates that a crop is thriving and likely not suffering from pest pressures, while increased beneficial insect populations suggest that the pesticide application was properly timed and targeted, helping to conserve beneficial organisms instead of harming them. Consistent herbicide effects would typically signify effective application rather than misapplication. Therefore, looking for signs of unusual pest resurgence is a practical way to assess the effectiveness of pesticide application and identify potential misapplications.