Practical Applications of Herbicide Physiology

This lesson will examine the basic requirements for herbicide performance, and how herbicide and plant characteristics interact as a basis for explaining performance. The application requirements of both soil and foliar active herbicides will be examined in relation to their characteristics. The influence of environmental conditions on herbicide performance, both weed control nd crop injury, will be examined. At the completion of this lesson, learners will be able to: Understand the influence of herbicide site of uptake and translocation characteristics on herbicide performance. Explain the effects of temperature and moisture on herbicide activity. Understand the mechanisms giving rise to herbicide selectivity. Understand the influence of weed seedling density on herbicide effectiveness. Explain the effect of weed size and age on sensitivity to herbicides. A bank of quiz questions focused on these objectives is a part of this lesson. The lesson is written to target educational needs of upper‐level undergraduate students and advanced extension audiences.