North Carolina State University

strawberry image

Strawberry Diagnostic Key

Integrated Pest Management

Page 2 of 11

Calcium Deficiency details

Calcium Deficiency

Characteristics:

Type: Nutrition
Leaf Condition: White netted spots, Tip burn, Distorted, Exudes sap, Marginal necrosis
Leaf Color: Marginal chlorosis
Leaf Location: Young
Fruit Condition: Deformed
Fruit Size: Small
Fruit Texture: Hard
Roots: Stunted
Petioles Condition: Death, Collapse, Exudes sap
Petioles Color: Darkens
Plant Size: Stunted
Season: Harvest

Common Leafspot details

Scientific Name(s): Mycosphaerella fragariae

Common Leafspot

Characteristics:

Type: Disease
Leaf Color: Brown or red rust spots
Leaf Location: Upper surface, Young, Mature
Petioles Condition: Lesion
Field Distribution: Random
Prior Environmental: Rain, Temp. between 20° and 32°
Season: Post transplant, Early spring

Copper Deficiency details

Copper Deficiency

Characteristics:

Type: Nutrition
Leaf Color: Pale green, Bleached, Interveinal chlorosis
Leaf Location: Young
Season: Pre harvest

Corn Earworm details

Scientific Name(s): Helicoverpa zea

Characteristics:

Type: Arthropod (or insect)
Fruit Condition: Holes or chewing damage
Field Distribution: Localized
Season: Harvest
Cropping System: Annual plasticulture, Perennial matted row

Crickets details

Scientific Name(s): Gryllus spp.

Characteristics:

Type: Arthropod (or insect)
Leaf Condition: Chewing damage
Fruit Condition: Holes or chewing damage
Season: Post transplant, Harvest
Cropping System: Annual plasticulture, Perennial matted row

Cutworms details

Scientific Name(s): Agrotis ipsilon (Hufnagel); Amathes c-nigrum (Linnaeus); Peridroma saucia (Hubner),

Characteristics:

Type: Arthropod (or insect)
Leaf Condition: Chewing damage
Petioles Condition: Clipped
Field Distribution: Edges
Season: Post transplant
Cropping System: Annual plasticulture, Perennial matted row

Cyclamen Mite details

Scientific Name(s): Phytonemus pallidus

Characteristics:

Type: Arthropod (or insect)
Leaf Condition: Stunted
Plant Size: Stunted
Field Distribution: Localized
Season: Pre harvest, Harvest
Cropping System: Annual plasticulture, Perennial matted row

Page 2 of 11

This strawberry diagnostic key was developed with funding in part from the Strawberry Sustainability Initiative, the Walmart Foundation, University of Arkansas, Southern Region IPM Center, North Carolina State University Cooperative Extension Service and the North Carolina Strawberry Association.

WalMart