Downy mildew (Peronospora spp.) has been reported as a disease of camelina (Camelina sativa) in Europe. Downy mildew was first identified on camelina grown in western Montana and Nebraska in 2006.
Symptoms include pale green to light yellow spots on the upper leaf surface. Gray, fuzzy spots on the underside of leaves, especially in humid weather, under irrigation, or when the canopy is very full. Can infect pods.
Downy mildew is an obligate parasite. It can survive in the crop residue and in the seed of infected plants. It is favored by cool, wet conditions.
Unless severe, downy mildew is generally considered of minor importance.
None.
· Avoid planting seed that has a crusty, white appearance.
· Do not plant seed from plants which were infected with downy mildew the previous year, since this is a seed-borne pathogen.
· Reduce or eliminate irrigation.
· Crop rotation to grass species (wheat, barley, corn).
· Tillage to reduce infected residue.
· No varieties tested in the US thus far are tolerant of downy mildew. Some resistance has been described in a variety called ‘Celine’ in Europe, and this may be a possible source of resistance.
No fungicides are registered for use on camelina.
Product List for PEST: None registered
The information
herein is supplied with the understanding that no discrimination is intended
and that listing of commercial products, necessary to this guide, implies no
endorsement by the authors or the Extension Services of Nebraska, Colorado,
Wyoming or Montana. Criticism of products or equipment not listed is neither
implied nor intended. Due to constantly changing labels, laws and
regulations, the Extension Services can assume no liability for the suggested
use of chemicals contained herein. Pesticides must be applied legally
complying with all label directions and precautions on the pesticide
container and any supplemental labeling and rules of state and federal
pesticide regulatory agencies. State rules and regulations and special
pesticide use allowances may vary from state to state: contact your State
Department of Agriculture for the rules, regulations and allowances
applicable in your state and locality.
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Robinson, R.G. 1987. Camelina: a useful research crop and a potential oilseed crop. University of Minnesota, Minnesota Agricultural Experiment Station, Bulletin 579-1987 (Item no. AD-SB-3275).
Vollmann, J., S. Steinkellner, J. Glauninger. 2001. Variation in resistance of camelina (Camelina sativa [L.] Crtz.) to downy mildew (Peronospora camelinae Gäum.). J. Phytopathology 149: 129-133.
Categories: Camelina, Downy Mildew, Peronospora
Date: 12/23/2007
