Semiarid regions in southern Idaho receive a small amount of annual precipitation (e.g., 9–12 inches), and crop options are very limited in dryland farming without supplemental irrigation. To diversify cropping systems, growers can incorporate crops with lower water requirements through rotations and intercropping. Field trials were conducted to evaluate crop yield and soil health in barley–pulse intercrops under full and deficit irrigation with no supplemental N fertilizers. Earn 0.5 CEUs in Soil & Water Management by reading this article and taking the quiz at https://web.sciencesocieties.org/Learning-Center/Courses.
In Washington State, east of the Cascade Mountains, alfalfa is grown for seed and forage. Alfalfa weevils are the primary defoliators of alfalfa grown for forage and seed, and Lygus bugs are the key direct pest in alfalfa seed production in the Pacific Northwest. Both alfalfa weevil and Lygus bugs are controlled by insecticide applications. Some levels of insecticide resistance have been observed in recent years. This article reports on a series of experiments that were conducted to quantify the resistance status of Lygus bugs and alfalfa weevils to several insecticides in Washington State. See page 28. Photo shows Doug Walsh, Washington State University, sweep-netting for Lygus bugs.
Ergot is a floral disease of grasses and a persistent problem in many cool-season grass seed production systems. The disease is particularly important and challenging in irrigated perennial ryegrass and Kentucky bluegrass seed production systems in Oregon and Washington. This article will discuss ergot biology, epidemiology, and management in grass seed crops as well as current and future research efforts. Earn 1 CEU in Integrated Pest Management by reading this article and taking the quiz at https://web.sciencesocieties.org/Learning-Center/Courses.
This is the third article in our series on soil health and greenhouse gas emissions on U.S. dairies associated with crop production. This article will focus on innovative technologies to advance in-the-field research. Earn 1 CEU in Sustainability by reading this article and taking the quiz at https://web.sciencesocieties.org/Learning-Center/Courses.
What is a plant nutrient? For many decades, plant nutrients have been defined by the concept of essentiality. More recently, however, 4R nutrient stewardship has been defined as management that produces sustainable outcomes. Some elements provide benefits even if they are not essential. A new definition of what a plant nutrient is has been proposed and is under consideration by authorities in fertilizer regulation. Earn 1 CEU in Nutrient Management by reading this article and taking the quiz at https://web.sciencesocieties.org/Learning-Center/Courses.
Managing flea beetle damage constantly challenges Canada’s canola growers. High populations have many producers speculating whether flea beetles have evolved resistance to common insecticidal seed treatments. Here’s a summary of the situation with insecticides and canola’s worst enemy on Canada’s prairies. Earn 0.5 CEUs in Integrated Pest Management by reading this article and taking the quiz at https://web.sciencesocieties.org/Learning-Center/Courses.
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