This is especially advised if you have had problems with any of these pests in the past. The use of dormant oil sprays will minimize the number of additional sprays you will need this summer. Be sure to apply the sprays before the buds open on your trees, and avoid spraying when a heavy freeze is expected. Apply thoroughly, and early enough in the day to allow the spray to dry before the evening freeze. Some weeds in the western valleys are already emerging, either from seed or from dormancy.
Cheat grass is an annual weed that is already greening up in alleys and vacant areas.
When this weed grass dies back in late spring, it becomes a nuisance to pets, as the sharp seeds penetrate their fur. It also becomes a fire hazard, and it is too late to control at that time. A spray of glyphosate while it is actively growing will do the most good. To control weeds effectively, it is important to begin with correct identification. Different species require different management techniques, different chemical controls, and different timing of applications.