High Tunnel Diseases

Brown circle with a yellow halo is a symptom of....

• Alternaria Leaf Spot

• Early Blight

• Late Blight

• Powdery Mildew

Brown spots with a grey halo

• Alternaria Leaf Spot

• Early Blight

• Late Blight

• Gray Mold

Tags

NGSS.MS-LS2-4

Patchy spots of yellow throughout the plant are a symptom of...

• Fusarium Wilt

• Verticillium Wilt

• Powdery Mildew

• Alternaria Leaf Rot

Tags

NGSS.HS-LS4-5

Can fungicides be used to cure infected plants?

• No

• Yes

What are the 3 legs of the Disease Triangle?

• Pathogen
• Susceptible Host

• Environment

• Vector

An example of a Physical Control would be...

• maintaining a Relative Humidity of less than 70%

• Spraying copper-based fungicide diligently throughout the season

• Rotating crops every 3 to 4 years

• Purchasing resistant plant varieties

An example of Cultural Controls would be...

• regimented pruning schedule

• removing debris from the HT floor

• using wider spacings between plants

• all of these

Tags

NGSS.MS-LS2-4

NGSS.MS-LS2-5

An example of biological controls would be....

• Plant resistant varieties

• Remove debris from the HT floor

• Spray copper-based fungicides

• Lower Relative Humidity levels to less than 70 percent

Tags

NGSS.MS-LS2-5

An example of chemical controls would be...

• Spray a copper-based fungicide

• raise the soil pH closer to 7

• remove debris from the HT floor

• lower relative humidity to less than 70 percent

Tags

NGSS.HS-LS2-7

NGSS.HS-PS1-5

Outer leaves die while newer/younger leaves remain fine.

• Fusarium Wilt

• Verticillium Wilt

• Rhizoctonia Wilt

• Alternaria Leaf Spot