In this section the most importants walnut pathologies are described:

• Walnut bacteriosis (Xanthonomas campestris p.v.juglandis)
• Anthracnose (gnomia leptostyla)
• Armillaria and Phytophthora  (Armillaria mellea y Phytophtora, esp.)
• Deepbark canker (Erwinia rubefaciens)
• apical necrosis
• Walnut fly (Rhagoletis completa)
• Carpocapsa (Laspeyresia pomonella)
• walnut moth (transitella Amyelois and Ectomyelois ceratoniae)