spider mites on pole beans

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JoParrott Richland, WA(Zone 7b) Jul 17, 2009

What if anything can I use to get rid of spider mites on pole beans? I had 4 towers that were producing heavily, and before I knew it the mites wiped out 2 of them. I just pulled them up and replanted, hoping for a late crop. But the other two are not bad- I have been misting them a lot, especially undersides of leaves, knowing they don't like that. Years ago I think I used nicotine spray, and something else that I can't recall. Any help will be appreciated.

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ecrane3 Dublin, CA(Zone 9a) Jul 17, 2009

Insecticidal soap and neem are two organic things you could use--the trick is to thoroughly spray the undersides of the leaves since that's where they live, and you may need to repeat a few times to really get the infestation under control.

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JoParrott Richland, WA(Zone 7b) Jul 18, 2009

Thanks, ecrane- I have never used neem oil- will it damage in heat? Our temps are right at 100 here now- of course I would not spray in the sunlight time- probably late evening.

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ecrane3 Dublin, CA(Zone 9a) Jul 18, 2009

I'm not sure--I don't think it's as bad as some oils but it's still probably best to apply it when the sun's not out. And if you just get it mostly on the undersides of the leaves that'll help too. The only time I've used it is in the winter in my greenhouse and haven't had any trouble even on sunny days where it got pretty warm in there (80's or so) but that's not quite the same as using it in 100 degrees in full sun!

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