Illinois Field Crop Applicators Practice Test

In which scenario should tank mix herbicides not be prioritized?

1. When weed density is low

2. When conditions are optimal for weeds

3. When herbicide grows on crops

4. When adjuvants are used

The correct answer is: When weed density is low

In scenarios where weed density is low, prioritizing tank mix herbicides may not be necessary. When the presence of weeds is minimal, the potential benefits of applying multiple herbicides in a tank mix diminish. Typically, tank mixing is employed to broaden the spectrum of weed control or to combat resistant weed populations. However, in an environment where weed competition is not significant, the need for multiple herbicides is reduced, allowing for more focused management strategies, potentially lowering costs and minimizing the risk of herbicide resistance development. Thus, the choice to avoid prioritizing tank mixes in low weed density situations aligns with efficient herbicide application practices.