In contrast, weed species less likely to develop resistance generally have 1) a slower generation time, 2) incomplete selection pressure for most herbicides, 3) ability to adapt to changing environment, 4) lower fitness for resistant biotypes, and 5) extended seed dormancy in the soil. These factors increase the number of susceptible biotypes in the population.
Herbicide characteristics which lead to rapid development of herbicide resistance in weed biotypes include: