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It’s becoming a summer ritual, but nothing fun like going out for ice cream or sitting outside enjoying the sunshine. Nevertheless, it begins every year around this time. We are preparing for battle against the squash vine borer.

Found several eggs on this plant -- very hard to spot

Found several eggs on this plant — very hard to spot (yes they’re in the picture)

I’ve written extensively about this problem before and always hope for the best. This summer we found vine borer eggs on our yellow squash and zucchini plants. They are hard to spot — very tiny light brown eggs laid on the plants not in clusters but individually.

My new nightly ritual for the next few weeks will be inspecting every inch of the plants, picking off and crushing any eggs I find.

Also, we’re taking a proactive approach and injecting each stem with Bt, a natural bacteria that can kill the borer if it hatches and tunnels into the vines. If the past few years are any indication, we’ll lose at least some of the zucchini and squash. If it happens again, we’re┬ádone with zucchini for at least a year or two so it can move on to someone else’s garden.

 

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We tried. We really did. Being vigilant about searching for and destroying eggs, watching for any signs of damage — we did it all. But it still didn’t work. The damn squash vine borer got our zucchini and yellow squash.

This shows squash vine borer damage on our zucchini plant. The frass is a sign of an infestation.

This shows squash vine borer damage on our zucchini plant. The frass is a sign of an infestation.

I noticed the tell-tale signs of frass a couple weeks ago. It looks a lot like sawdust and it meant our summer squash plants would die soon. That’s when I sprung into action and tried the Bt to stop the grubby invaders.

I’ve mentioned this before but for those who don’t know, Bt is a natural bacteria that messes with the borer’s digestion when they eat it. So as soon as we noticed the frass, I was armed with my garden syringe and a jug of Bt (it has to be mixed with water), stabbing away at the stems and injecting the solution.

This was the first time I tried using the Bt solution, and you know what? It worked like a charm. The zucchini plant has rebounded (for the most part), and there are even a couple growing again!

Even if we don’t get any more, I’ll at least count this as a success.

Related: How to control SVB

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