Downy Mildew of Peas

Peronospora viciae

Description:

A fungal disease that causes the upper surfaces leaves to yellow, usually from the base or margin. Thick grey brown furry growth develops on the underside of leaves as the disease progresses.

Species Affected:

Pea.

Biology:

Favoured by wet weather.

Life Cycle:

Origin and History:

Distribution:

Significance:

Greatest risk is a crop emergence and seedlings may be killed.
Often results in yield losses of 20%.

Management and Control:

Avoid planting Peas in paddocks where the disease has occurred previously.
Destroy infected crop residues.
Treat seed with a product containing metalaxyl.
Plant in well-drained, sunny areas.
Avoid watering late in the day.
Improve air circulation.
Apply fungicides and include a wetting agent.

Related and Similar Species:

References:

1291

Acknowledgments:

Collated by HerbiGuide. Phone 08 98444064 or www.HerbiGuide.com.au for more information.