2018 Crop Protection Guide for Tree Fruits in Washington

Fruit and Leaf Injury

Friday, July 20, 2018

Limited Compatibility Materials

Materials shown here are known to be compatible only as listed:

Calcium chloride (apple)—Compatible with wettable powder formulations of diazinon and phosmet (Imidan). Pears are more sensitive than apples to the above combinations. Calcium materials may cause injury when mixed with materials containing copper and zinc and possibly other heavy metals.

Zinc sulfate—May be combined with boron (Solubor) in delayed dormant sprays.

Tree Fruit Research & Extension Center, 1100 N Western Ave, Washington State University, Wenatchee WA 98801, 509-663-8181, Contact Us