Hi, I am a backyard gardener in raised beds in Medford. This is my third year to garden here. First I do rotate what I grow in my beds, but have not been able to skip more than one year before a similar plant family will end up in the same bed. That being said, I am writing to you about cucumbers. I raised my own seedlings, in 6 inch pots. They grew to have 4 to 6 leaves. I hardened them off, and transplanted them into a bed that had carrots last year on May 7th. Within 3 days, they started to wilt. I couldn’t see any insects on the undersides, I dug down into the soil, and saw some tiny white worm like insects and some gray centipede like worms. I tried spraying a been oil concoction on the plants and soil. Within 5 days, all the plants were dead. The stems had been hollowed out. Also in the same bed, I had planted marigolds. All of their leaves were stripped. So now I’m on the war path. I applied diatomaceous earth dust working it into the soil down 6 inches, and sprinkling it onto the top. I bought more cucumber seedlings, and will wait about a week before I try transplanting again. So, what are those crawling insects that are in the soil? And did I do the right action? I hated to use the dust because it will kill the good bugs and earthworms too, but I was at my end. Thanks so much for any advice.