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Raspberry beetle damage

Posted: Wednesday 24 July 2013
by Pippa Greenwood

My raspberry crop is coming on nicely, thanks to the hot weather, a good drenching of water and the well-rotted manure applied earlier this year.


My raspberry crop is coming on nicely, thanks to the hot weather, a good drenching of water and the well-rotted manure applied earlier this year. The soil here is strongly alkaline and decidedly heavy, making it well-nigh impossible to grow summer-fruiting raspberries (despite my efforts at soil improvement). So, I grow lots of autumn-fruiting varieties instead.

Strangely, my ‘Fall Gold’ raspberries are already fruiting. The fruits are smaller than usual, and quite a few are showing signs of raspberry beetle damage. This isn’t a pest I usually have problems with, so it's rather taken me by surprise.

The classic symptoms of raspberry beetle damage include small, dryish areas on the shoulder of the berry, which spoils their appearance and eating quality. Also, not being one for enjoying eating larvae, it makes them pretty well unusable. Only the hens profit from these raspberries - I guess the juicy, protein-rich fruits must be a five-star snack for them.

Raspberry beetle larvae generally start at the base of the berry, then progress to the inner plug. When you pick the fruits and leave them in the punnet for a while, you’re likely to see the greyish-brown, maggot-like critters boogying around the edge of the bowl.

I’m sure I'm only seeing the larvae because the raspberries are fruiting unusually early. I'll install a raspberry beetle trap to catch some of the adult beetles (something I should have done a while back). I’ve been caught out this time, but I'll be ready for them next season...





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ShireGardener 24/07/2013 at 21:10

For the third year in a row, all my four varieties are fruiting together. Last year, I had a second cropping on the two autumn varieties and it was far superior to the first cropping. My Fall Gold are producing the best crop and quality out of all of them right now. Odd.

The potty gardener 25/07/2013 at 07:30

Janice Sharkey 07/11/2013 at 16:22

Please can you tell me how to trap raspberry beetle from attacking my raspberry bushes?

Janice Sharkey