Common Problems

Marssonina blotch, caused by Marssonina caronaria, is a foliar disease first identified in Pennsylvania in September 2017.

Potassium (K) plays a critical role in many plant physiology and biochemistry processes such as photosynthesis, osmoregulation, and enzyme activation.

Resistance has sometimes resulted in pest-management-program failures. Below are presented tactics to help delay resistance to fungicides.

Tree fruit growers can prevent resistance to fungicides by alternating chemicals by FRAC group, also known as "spraying by the numbers."