What can be a result of pesticide product separation in layers?

Pesticide product separation into layers can indicate stratification, which often leads to potential loss of effectiveness and instability in the product. When a pesticide separates, the active ingredients may not be evenly distributed throughout the mixture, meaning that when applied, the concentration of the active ingredient may vary. This could result in insufficient application of the pesticide, reducing its efficacy against target pests. Additionally, separation may affect the stability of the formulation, leading to degradation of the active ingredients over time. Proper mixing is essential to ensure homogeneity and to maintain the intended performance of the pesticide.

This situation contrasts with the other options, which imply benefits like improved effectiveness or safety that would typically require a uniform product. Thus, the potential for instability and reduced efficacy closely ties back to the observable phenomenon of layering in pesticide products.