My squash plants look great now but they are about to flower and I have a sinking feeling in my gut. I have the stems wrapped, after a fashion, but I'm not confident I'll be able to exclude them that way. I've also tried insecticidal soap with mixed results in the past. I think it worked as long as I applied it often enough. Has anyone had success controlling this pest?
Wrapping aluminum foil around the base and spreading a little around the plant on the ground is supposed to help. I've had good success using silver mulch - same idea - but you have to do that when you're preparing the row for planting.
For vine borer, the best way is to watch the plants. If you see a little pile of what looks like sawdust, take a razor knife & cut with the stem. You can then get the borer out of the stem. Pile dirt on the wounded spot. Should recover nicely.
I've never had any luck trying to remove a borer and then having the plant recover, which is why I try to prevent their damage in the first place. I know some people seem able to manage it, but I've read a lot of other comments from people whose plant(s) died anyway, even after surgery!
Thanks for the suggestions. I have tried surgery but I don't think I was consistently vigilent enough to make it work. I'll try to dig them out when I see them but I will add foil as soon as I can get back out there. Greenhouse_gal, are you thinking that the foil needs to exclude them entirely or is it some property of the foil that keeps them away? Thanks, again.
A little of both, Back40Bean. Supposedly the reflection from the foil confuses them, but the foil also excludes them. When I use silver mulch, though, there's no exclusion; it just behaves like regular mulch, lying flat, and it still seems to make a big difference.
I've been spraying the stem bases of my squash and zucchini plants with Bt (Bacillus Thuringiensis) since the squash vine borer is a moth. Works very well, but doesn't affect squash bugs of course. So, I always check for egg masses on the leaves and have managed to keep them under control.
I've always wondered why Bt isn't recommended for SVB control.
Thanks for the replies. I haven't yet used Bt but I'll think more about using it, maybe next year. My gardening time has been limited the past 2 months but we've managed to get a few squash to eat which is better than none.
The instructions on my bottle of BT concentrate just listed cabbage loopers, but it's good to know some bottles are more accurate. Thanks! With our posts, perhaps it will help lots of gardeners who didn't know about it.
I think it's a good idea! Only problem is locating the little b@$%@*d. I've done the surgery to remove them with good success; I wrapped the "wound" with masking tape. Probably a good idea to cover some of the vine farther up the plant with dirt so it can form roots.
I have a new solution and it WORKS! Traps and lures. They aren't expensive. Kills them before they lay eggs. Also when you're digging in the soil, you will find their cocoon(is that what it's called? where they change from a worm to a moth?) I'm using them for pickle worms also.
Yes, you can buy either delta or wing traps (which are not hard to make at home, then all you need is the sticky insert) or you can buy the sticky cards. Moths are easier to catch in a delta or wing trap, aphids, whiteflies and other insects are attracted to the sticky cards (blue for some, yellow for others). You can also make your own sticky traps with colored dixie cups and vaseline. The lures are a pheromone, so you have to buy those.