Yes, I have done the can around the plant in the past, but for some reason it didn't stop the worms and I had mold problems with the ones I had done it to. I was out tying up some plants last night that had toppled over. They were already staked and tied, but had outgrown the ties! These are the tallest tomato plants I have ever had! Still have aphids, but now I see the Lady Bugs coming in, so I won't spray them. They LOVE aphids!! Been battling Japanese Beetles this year too, not something I generally see here. They have taken a real liking to my Basil plants. I dusted them with Sevin to no avail. Think I'll start picking off the sprouts and start drying some just in case. It sure smells good, even when you just barely brush the plant with your finger, it lets off a rush of aroma!those will work great! Do three to 4 per plant if you have enough....also, we use coffee cans and gallon size food cans (from restaurants) and cut off both the top and bottom and when I plant most of my plants (tomatoes, kohrabi, cauliflower, etc) will put one of the cans around the small plant and sink it into the ground a bit. I do this for quite a few reasons...the major one is that it keeps things like cut worms from being able to get to the plants, but also, gives a bit of shade protection to the little guys when they first are growing so their roots can establish, and the best part is when the plants are bigger, they offer a bit of stability for plants...especially around here, from the winds, and you can fill the can up to the top and let it soak in when you move onto the next plant and come back and do it again (makes watering go so much faster)...this way I can keep track of roughly how much water the plant is getting. I still do the soaker bottles as well on the more sensitive plants...like tomatoes, cucumbers, melons and etc.