Make no mistake, I grew up in the 60's dusting with Seven, as it was introduced, we began to move from Lead Arsenic. Dusting was my job and there was 7 or 8 acres to dust, by hand. How much I breathed, absorbed and licked? I'd hate to contemplate. I look back at those days now and shudder a little, 'cause while I was doing that, to an overload, Dad was spraying everything, soaking everything in the yards with DDT.
Anyhow, it is difficult to move off from Sevin because it has been a mainstay for so long. We took it for granted. I know I did. We never bothered seeking alternatives. Now, I must.
The vines; cukes, pumpkins, squash, etc are indeed the most difficult and I'm not naive about that. It's a real challenge. All I can say is I am having positive results combining many methodologies, most of which involve prevention, not cure. Land rotation, soil health, Lime, ph factors, sister planting, seasonal timing, floating screens etc.,
Can we live without Sevin? Of course we can.
(BTW, replacing chemical fertilizers with organic composts is the easiest of all first steps.)
Best regards,