I would like to hear from you if you have this problem. There are many things that can go wrong with raspberries just as harvest begins. Root diseases, cane diseases, and insect damage to the cane or crown can interfere with the transport of nutrients and water to the fruiting clusters. Very often fruiting clusters shrivel up and entire canes die back. The most common problems on raspberries are crown borer, Phytophthora root rot, and cane blight.
Harvest is just a few weeks away for some growers.
If you are trapping for blueberry maggot, using yellow sticky boards, that the traps will catch all sorts of flies and insects. Traps should be replaced every two-three weeks. Apple maggot flies and cherry fruit flies are similar to blueberry maggot flies. Apple maggot and blueberry maggot flies have stripes that are connected and form a U shape and F shape. If you require positive identification of these flies, do not remove them from the trap.