One sunny day, I beheld a couple of ladybugs and many ants upon one of my seven glorious surviving glass gem cornstalks. Ah, I sighed. How beautiful. Nature in her wisdom is controlling the aphid population and saving my bounteous harvest. And I went on my merry way.
Well.
I checked back today and Nature is not saving any damn thing. That cornstalk is now lousy with aphids. The ladybugs seem to have decided that it'll be a good source of food for a while because they're starting a ladybug family. Turns out ants are smart enough to do some quasi-farming of their own and aphids are like their livestock. They are not eating the aphids; they are in fact grazing and milking the aphids. Great.
So here come the stupid questions.
1. The cornstalk is not apparently suffering. Is the aphid infestation a big deal?
2. The aphids are ignoring the more delicate beans and the watermelon, which are all right there in the traditional-ish way. (I know, I know, I've figured out that the watermelon was a mistake. It has absolutely climbed the corn and can't be convinced to detangle at this point. I'll post about my watermelon scaffold plans in another forum.) Is it reasonable to have a designated aphid sacrifice or am I just contributing to the burgeoning aphid population? Will they take over?
3. I'm not going to spray pesticides on these plants. Any other way to de-aphid them? My current ideas include biodegradable soapy water in a spray nozzle and a mesh cage that I can strap to the plant and fill with ravenous ladybugs. But I don't know how the soap will affect the plant or if that will even work, and I also don't know if ladybugs who are not actively in love will fight over the aphids.
4. Ladybug bonus: how long will it take the new ladybugs to hatch and is that likely to bring this situation back into some kind of equilibrium? (As in tiltedheavily in my favor and against the aphids and ants?)
Thanks, wise gardeners!