{"id":2662,"date":"2019-10-02T00:03:10","date_gmt":"2019-10-02T07:03:10","guid":{"rendered":"https:\/\/depts.washington.edu\/hortlib\/pal\/pal-question-452\/"},"modified":"2023-08-08T15:37:04","modified_gmt":"2023-08-08T22:37:04","slug":"pests-and-diseases-of-raspberries","status":"publish","type":"pal","link":"https:\/\/depts.washington.edu\/hortlib\/pal\/pests-and-diseases-of-raspberries\/","title":{"rendered":"Pests and diseases of raspberries"},"content":{"rendered":"

It appears that my raspberries may have a disease. I noticed some fruiting canes getting
\ndiscolored, then curling leaves, then dying completely. I ripped out ones that were dying or dead, but others seem to be showing beginning symptoms. <\/strong><\/p>\n

There are many potential culprits that could be causing the problems you
\nare observing with your raspberries. It could be a pest, or it could be a
\nfungal disease. Remember that summer bearing raspberry canes die after bearing fruit. The canes start to look bedraggled even as fruit is ripening. Once all fruit has been picked these canes should be cut to the ground. Next year’s fruiting canes will look healthy and should not be cut down to the ground.<\/p>\n

Have you looked inside any of the affected canes after cutting them? If
\nyou have cane borers, you may find that white grubs have burrowed toward
\nthe base of the cane. Crown borers also cause wilting of new growth in
\nthe spring followed by dieback of the cane. Here are links to
\ninformation and images so you can compare what you are seeing with your
\nplants:<\/p>\n

Insects and Diseases of Raspberries<\/a> from University of Illinois Extension.<\/p>\n

Pests and Disorders of Blackberries and Raspberries<\/a> from University of California.<\/p>\n

Washington State University’s Hortsense page on Raspberries<\/a> (see sidebar on left for diseases and insects)<\/p>\n

Raspberry root rot<\/a> information is available in the Pacific Northwest Disease Management Handbook.<\/p>\n

Washington State University Extension’s information for home gardeners says:<\/p>\n

“Foliage symptoms of root rots. Root rot is usually noticed when leaves
\nbegin to wilt, turn yellow or brown, and die. Symptoms commonly occur
\nduring warm spring or summer weather and may develop in a few days or
\ntake longer. If longer, leaves are generally yellowish and stunted before
\nthey die.<\/p>\n

“Root symptoms of general root rot. Root systems are small, dark brown or
\nblack, and rotted. Since healthy roots may or may not have dark surfaces,
\ndetermine root condition by cutting or scraping them. All of the inside
\nof a healthy root is whitish, but the inside of a rotted root is partly
\nor entirely brownish or blackish. Wash the cutting tool in soapy water
\nand swab in rubbing alcohol after cutting.”<\/p>\n

You may want to bring samples plus photos of the whole plant to a Master Gardener clinic<\/a> for diagnosis. There is a link to the current clinic schedule on their website.<\/p>\n

Once you have identified the source, you can try to address the problems
\nand resume growing happy raspberry plants. Oregon State University has a guide to growing raspberries<\/a> which may be helpful.<\/p>\n","protected":false},"excerpt":{"rendered":"

It appears that my raspberries may have a disease. I noticed some fruiting canes getting discolored, then curling leaves, then dying completely. I ripped out ones that were dying or dead, but others seem to be showing beginning symptoms. There are many potential culprits that could be causing the problems you are observing with your raspberries. It could be a pest, or it could be a fungal disease. Remember that summer bearing raspberry canes die after bearing fruit. The canes…<\/p>\n

Continue reading Pests and diseases of raspberries<\/span><\/a><\/div>\n","protected":false},"author":4,"featured_media":0,"menu_order":0,"template":"","keyword":[517,621],"class_list":["post-2662","pal","type-pal","status-publish","hentry","keyword-fruit-diseases-and-pests","keyword-rubus"],"acf":[],"_links":{"self":[{"href":"https:\/\/depts.washington.edu\/hortlib\/wp-json\/wp\/v2\/pal\/2662"}],"collection":[{"href":"https:\/\/depts.washington.edu\/hortlib\/wp-json\/wp\/v2\/pal"}],"about":[{"href":"https:\/\/depts.washington.edu\/hortlib\/wp-json\/wp\/v2\/types\/pal"}],"author":[{"embeddable":true,"href":"https:\/\/depts.washington.edu\/hortlib\/wp-json\/wp\/v2\/users\/4"}],"wp:attachment":[{"href":"https:\/\/depts.washington.edu\/hortlib\/wp-json\/wp\/v2\/media?parent=2662"}],"wp:term":[{"taxonomy":"keyword","embeddable":true,"href":"https:\/\/depts.washington.edu\/hortlib\/wp-json\/wp\/v2\/keyword?post=2662"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}