Marssonina blotch is a foliar disease first identified in Pennsylvania in September 2017. Conditions are favorable for this disease and symptoms have been observed in several orchards.
Scarf skin is a physiological disorder of apple fruit that causes a dull gray cloudy or waxy appearance on the surface of the peel (epidermis) where it is most readily observed on varieties with a red or dark red background.
Michela Centinari, Ph.D.
Potassium (K) plays a critical role in many plant physiology and biochemistry processes such as photosynthesis, osmoregulation, and enzyme activation.
Pennsylvania has experienced a combined average per location of about 20 inches of rain during the last 5 weeks.
Kari A. Peter, Ph.D.
Resistance has sometimes resulted in pest-management-program failures. Below are presented tactics to help delay resistance to fungicides.
First-generation flights of codling moth, tufted apple bud moth, and obliquebanded leafroller continue, second-generation Oriental fruit moth about to start, monitor for leafhoppers, woolly apple aphids, San Jose scales, and European red mites.