This spray controls leafrollers, mildew, and apple scab. This spray depends upon degree day model for proper timing. It helps control Codling moth, mildew, and aphids. When reaching a certain height, the apple trees must be tied to the wire. If not, the small root system may be unable to sustain the tree in an upright position during heavy snow or rainfall, wind, or when thee are apples on the tree.
Students use a small, rubber tubing to tie the trees to the wire.
Leaving about an inch gap, they loop around the tree stock, and then with both ends pointing to them, loop around the wire once, finishing with a square knot. While the students were tying trees to the trellis wire, Maria Cantwell, U.S. Senate candidate, stopped by to watch the students and learn about the orchard project. Ms. Cantwell is currently on her One Washington Bus Tour. Later, students took her in the classroom to give her a tour of the orchard web site on one of their laptop computers. One pound of Biogrow fertilizer is used.