Walnut Deficiencies

These photos of some of the major pests are accessed from the UC ANR Repository, are available courtesy of University of California research and extension personnel and programs, including the UC Statewide IPM Program.

Potassium Deficiency in Walnut.
Foliage damage caused by zinc deficiency.
Potassium Deficiency in Walnut.
Potassium Deficiency in Walnut. Foliage damage caused by zinc deficiency. Potassium Deficiency in Walnut.
Photo by JKClark. UC IPM Project, ©UC Regents Photo by JKClark. UC IPM Project, ©UC Regents Photo by JKClark. UC IPM Project, ©UC Regents
Walnut Boron Toxicity
   
Walnut Boron Toxicity.    
Photo by JKClark. UC IPM Project, ©UC Regents