Flea beetle attack! They're back! So I looked up on this blog to see when and where I had flea beetle problems in the past. Turns out it was March 2015 in the exact same area.
Back in 2015 I tried all sorts of things to rid the bed of flea beetles. Frankly, without resorting the big chemical attack or flamethrower, nothing quite worked. The best was the safer soap with pyrethins, but I learned that one needs to start spraying the moment the first flea beetle is seen. Otherwise they've laid eggs and it too late to eliminate them without daily spraying. I'd skip a few days and check....scads of beetles again. In the end I ripped out everything that the little bugs would eat and planted a resistant crop for 9 months. That seemed to get rid of them. But they're back again. Happily I was able to harvest several crops of beans, peas, and potatoes in this spot before the beetles returned.
Plan of attack :
Remove all susceptible plants from the area.
Till in generous amounts of compost and manure.
Plant a crop that flea beetles won't attack.
Wait 6 to 9 months before planting beans, peas, or potatoes again.
I notice that this type of flea beetle also likes sweet potatoes. So I'll need to watch my sweets in the adjacent growing areas for beetles.