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Best method to control blackberry cane borer

Posted by 2010ChampsBCS 7 (My Page) on
Wed, Apr 23, 14 at 21:51

Just when you think you have found the perfect backyard berry along comes the cane borer to jolt you back to reality. About 70-80% of my plants have the knots on the canes. Questions: Will I lose this year crop? What is your opinion on future control of the problem?

Follow-Up Postings:

RE: Best method to control blackberry cane borer

  • Posted by ericwi Dane County WI (My Page) on
    Thu, Apr 24, 14 at 9:14

We have raspberries, not blackberries. When I see evidence of cane borer damage, I immediately prune off the damaged cane, and cut up the section where the insect is hiding, before placing this material on the compost pile. The raspberry plant recovers, grows a new cane, and typically begins fruiting within 6 weeks or so. For me, this insect is more of a nuisance than a serious problem. Spotted wing drosophilia is another matter, however...

RE: Best method to control blackberry cane borer

The problem on blackberries is that most of your fruit is concentrated on a few canes, generally. So if you cut the cane to remove the borer larvae, you lose out on all of that potential fruit. I had a row of boysenberries that I had to basically cut down to remove the infested canes. I'm going to use an Imidacloprid-based insecticide later in the year post-bloom. That should help resolve that problem for next year. This will be the first insecticide I have had to use so far.

RE: Best method to control blackberry cane borer

Olpea said he tried to cut them out but could not control it. I have a bad infestation and have not yet worked out a good treatment. I am going to try this year being very eager about removing any bulge right when I find it. I'm trying to avoid the insecticide route. More generally I'm not sure what my future with blackberries is, the SWD will be showing up here soon.


RE: Best method to control blackberry cane borer

Going in I thought this was going to be my berry of choice. Everything I read indicated that if you water when needed most of the other issues would take care of itself. I guess I was drinking the kool-aid. Without exception my Natchez, Apache, and Triple crown has borer infestation. As stated earlier the small number of canes per crown would mean removing 3/4 of crop. I prefer not to use insecticide but will be willing to if I can do during the non-crop time. Thanks, and and other information is welcome.

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