Jostaberry attacked by sawfly

There are several crosses between gooseberries and blackcurrants, one of which is the Jostaberry. We had a great specimen, planted winter before last and due to bear its first modest crop this year. However, it has been badly damaged by the most problematic pest of gooseberries, the larvae of the gooseberry sawfly. Their favoured feed… Continue reading Jostaberry attacked by sawfly