One of the few raspberry pests is the raspberry cane borer. It is an easy pest to control organically because all you do is clip it out, no spraying and no one gets harmed. It's simple to find, look at your cane, you'll see where it is dead, then go down about 6 inches and you'll see 2 little girdle lines. The adult has girdled the cane and laid an egg in between. If you don't clip this out that egg will hatch, the worm will go down that cane and kill the whole cane. So as soon as you see the died back area, go 6 inches below it, snip it out and importantly throw the diseased cane in a bucket or bag and take it away so that the insect doesn't stay in the yard. It's a simple way to keep your raspberries looking great.