Raspberry

Asked June 15, 2020, 1:23 PM EDT

Last year a few of my raspberry plants had yellow leaves, but the crop basically thrived. This year the whole crop is getting yellow leaves, the new shoots are curling and dying. Is there anything I can do to save them? I did add a lot of manure (cow) this last winter. I don't use chemicals typically, but will do anything I can to save them. Thanks! Ann

Klickitat County Washington

1 Response

I think your chlorotic, yellowing leaves go beyond simple nitrogen deficiency. This looks like one of the common raspberry viruses that we have here in the PNW, probably Raspberry Bushy Dwarf Virus (RBDV) It's spread by pollen, so is impossible to stop other than removing the infected bushes and any wild raspberries that may be near. There is no cure. Here are a couple of websites for more information. If you need confirmation, you can call your county's extension office and ask them to submit a sample to the WSU plant pathology lab. Klickitat Extension office--228 W. Main, MS-CH 12, Goldendale, WA, 98620. 509-773-5817
https://pnwhandbooks.org/plantdisease/host-disease/raspberry-rubus-spp-viruses
http://www.omafra.gov.on.ca/english/crops/hort/news/hortmatt/2013/05hrt13a1.htm

If you decide to plant raspberries again, you will want to select varieties that are resistant to the virus. This OSU publication has a long list of cultivars and mentions disease issues with each one. https://catalog.extension.oregonstate.edu/sites/catalog/files/project/pdf/pnw655.pdf