This is caused by raspberry beetles feeding on the developing fruits. Use a beetle trap to help catch any on these insects while the canes are in flower. After petal fall, keep the plants well watered to help the fruits swell and spray with Provanto Ultimate Fruit and Vegetable Bug Killer from Bayer or Resolva Bug Killer from Westland.
Gardening Expert: |
If you can't find what you are looking for on the website then you can ask one of our experts. To get in touch with us Click Here
We will try to get back to you with an answer as soon as we can.
Did you find this answer useful? Subscribe to our newsletter for gardeing news, projects, special offers and competitions.
Butchart Gardens
British Columbia, Canada
RHS Harlow Carr
Harrogate, United Kingdom
Dubai Miracle Garden
Dubai, United Arab Emirates
Royal Botanic Gardens, Kew
Richmond, United Kingdom
Royal Botanic Gardens Victoria
Melbourne, Australia
Pamplemousses Botanical Garden
Pamplemousses, Mauritius