Tree Fruit Research & Extension Center

Cullage Assessment & Education

Quick Identification Guide to Apple Postharvest Defects & Disorders Cards

Mechanical & Field Injury

The Mechanical & Field Injury section of the card set includes many of the injuries that occur to applesprior to harvest. This includes problems such as bruising and weather induced defects, except sunburn, which is covered in the Fruit Finish section. At a later date more cards may be developed for this section which would include any emerging or reclassified disorders. For ordering information visit the Order Information section of the Introduction. The cards shown on this site are slightly modified to accomodate web formatting. Figures may appear fragmented in some browsers. Please report viewing problems here. Any reproduction of the card images or content without permission is in violation of WSU Copyright policies.

 

 

MECHANICAL/FIELD INJURY: Chemical Burn   

Chemical Burn

Chemical burns originating in the orchard may appear differently depending on the variety's susceptibility to the chemical and which chemical is responsible. Any chemical applied in or around an orchard can cause fruit burns. This includes oils, pesticides, herbicides, fertilizers and growth regulators depending on how the chemical was applied. Unfortunately, the resulting burns may be hard to identify because the damage may take time to develop and may look like insect or other types of damage.

Figure 1: The burns shown here were caused by a nutrient spray that left large droplets on the fruit surface.

 

 

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