Cultivar Mgmt. Profiles
Ranger Russet
Russet Norkotah
Yukon Gold
Atantic
Norland
Snowden
Red Cloud
Shepody
Fertilizers
Potassium
Sulfur
Micronutrients
Placement
Cementing
Crusting
External Disorders
Internal Disorders
Environmental Disorders
Diseases
Wilts
Tuber Wet Rot
Tuber Blemishes
Early Blights
Beneficial Insects
Predators
Green Lacewings
Lady Beetles
Stink Bugs
Insects
Defoliators
Vectors
Tuber Eaters
General Interest
Lab to Label
Controlling Volunteers
Biopesticides
Chemophobia
Neutraceutical
BT Potato
Chemical Effects
Controlling Volunteers
Weed Control

Summary Table: Causes of External Disorder

Disorder

Primary Cause

Occurrence

Market Effect

Deformation

heat*

bulking

quality

Growth Crack

wet/dry soil*

bulking

quality

Chaining

hot soil

mid-bulking

yield (size)

Hair Sprout

hot soil

late-bulking

quality and yield

Swollen Lenticel

wet soil

bulking-harvest

storage rots

Greening

light

bulking-storage

quality

Thumnbnail Crack

very dry soil

harvest

storage rots

Air Crack

sudden cold

harvest

storage rots

Little Tuber

seed aging

storage

yield (stand)

“Hides”

?

?

(quality)

* Deformations may also be caused by some herbicides.

[Potato Education Guide] [Deformations] [Cracking] [Swollen Lenicels] [Chaining] [Hair Sprouting] [Little Tuber Disorder] [Summary]