What is indicated by physical incompatibility in pesticides?

Physical incompatibility in pesticides refers to how certain pesticide products do not mix well when combined, leading to undesirable physical changes in the mixture. When pesticides form a putty or paste upon mixing, this indicates that they are not compatible with each other, making it difficult to apply effectively. This physical change can alter the effectiveness of the pesticide, diminish coverage, and potentially render the application useless.

In contrast, high toxicity levels pertain to the potential harm a pesticide can cause to humans, animals, or the environment, but does not specifically relate to mixing. Delayed effectiveness against pests could occur for various reasons, such as mode of action or environmental factors, but again does not specifically indicate incompatibility. Lastly, pesticides reacting with water typically involves a chemical reaction rather than a physical incompatibility, which would not result in a putty-like substance but could affect the availability or efficacy of the pesticide.