How to Manage Pests

Pests in Gardens and Landscapes

Walnuts

Cultural tips
Fertilizing First-year pruning Harvesting and storage Planting	Pruning Sanitation Site selection	Thinning Training Watering

Pests and disorders of walnuts
Invasive Pests Thousand cankers disease Field ID guide: Walnut twig beetle and thousand cankers disease (560 KB, PDF) For more information on these pests, see Exotic and Invasive Pests.
Invertebrates Aphids Dusky-veined walnut aphid Walnut aphid Armored scales San Jose scale Walnut scale Bark beetles and borers Pacific flatheaded borer Shothole borer Twig beetles Carpenterworm Codling moth Fall webworm Fruittree leafroller Lace bugs Navel orangeworm Nematodes Mites European red mite Spider mites Redhumped caterpillar Soft scales European fruit lecanium Frosted scale Tent caterpillars Walnut husk fly	Diseases Anthracnose Armillaria root rot (Oak root fungus) Blackline Branch wilt Crown gall Deep bark canker Phytophthora root and crown rot Shallow bark canker Walnut blight Wood decay Environmental disorders Frost damage Molds Overwatering Sunburn Wind injury Parasitic plants Broadleaf mistletoe Vertebrates Weeds

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How to Manage Pests

Pests in Gardens and Landscapes

Walnuts

Invasive Pests

Invertebrates

Diseases

Environmental disorders

Parasitic plants

Vertebrates

Weeds