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Notes on Saskatoon Berry Diseases
Saskatoon-juniper rust

Author: OMAFRA Staff
Creation Date: 17 May 2006
Last Reviewed: 17 May 2006

 

Identification

Early symptoms include yellowish spots and swellings on leaves and fruit. Older infections develop spiky outgrowths. On juniper, the fungus appears as woody round galls. Jelly like horns grow out of these galls in the spring.

Saskatoon-juniper rust gall

Saskatoon-juniper rust gall

Period of activity

In spring, after a rain, juniper galls produce spores that can spread to saskatoons up to 2 km away. The disease is favoured by cool wet spring weather.

Management Notes

  • Prune out rust galls or remove entire juniper plants in the immediate vicinity of the orchard to reduce disease pressure.
  • See Saskatoon Berry Calendar.

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