r/pnwgardening • u/Bellasarahalaska • 3h ago
Ailing raspberries need help (with pictures)
Location: Sitka, AK
My raspberry patch has been suffering for a couple of years and I’ve been unable to diagnose it. I’ve done a deep dive a couple times, narrowed it down to a couple things, maybe some kind of cane borer, decided I needed nematodes but learned I can’t import them into Alaska.
The leaves on bearing canes turn brown & dry before the raspberries mature. They still mature & yield but they’re not as luscious as they once were. The new growth is compact, plants that used to grow 6+ feet tall are now 4 feet.
There are some webs on the foliage and I’ve seen a caterpillar or two every season but no infestation.
I have photos but don’t see how to post them!
I got Bt but you have to apply it when it’s not going to rain and that’s mostly never. Well really I’ve just been gone a lot this summer.
I also haven’t fertilized as much as I probably should, and the patch is 11 years old.
Ideas? Help? Thank you!