Virus
Steve, I did not realize that some aphids are winged all the time, some
part time. My only reference was what I had seen on plants and they had no
wings. One of my bug books talk about the winged females moving from winter
host to new food source(your pumpkins) when they reach maturity. Your
plants are not infecting the others around you. The insects are infecting
yours by going to a new food source and bring the virus from the other
plants to your plants. I think you should find out how far an aphid
normally travels on the ground or in the air. At that point the choices
I've thought of are finding an aphid trap, phermones, something to pull the
insects away; aphid control out to the limit of their flight; or a cover on
the plants that block bug but not sun. Someone else might have other
input. If you stop the movement of the insects it should stop the virus.
Talk to an entomologist, I'm sure someone has done a study on the aphid
travel range. Roger
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