We dedicate this book to our dear friend, colleague, and coauthor, Charles “Chuck” Mohler. Unfortunately, Chuck passed away in April 2021 and was not able to witness his 15-year-long book project to its deserved culmination. Chuck was a unique individual in that he was not only a brilliant scientist able to produce some of the most inno- vative weed science research, but he could translate this often highly technical research into practical and useful information and advice for growers. Seeing or hearing of growers using his advice was undoubtedly one of the most satisfying aspects of his position as a weed scientist. Chuck lived a simple life and genuinely cared for people. He offered his help to anyone who asked for it and this assistance did not come with preconditions or expectation of repayment.