clear plastic "shield" to keep rain off and bug spray on

I just posted about problems with the rain washing off all of my bug spray. Has anyone tried making a shield out of plastic that covers the plants but is perforated in-between the plants to let the water down to the soil? I'm thinking of a 2-3' strip attached to stakes over each row.
I realize that it would diffuse the sun and would very likely blow off from the wind that roars through our valley but spraying every day to keep up with the afternoon rains is alot of overhead.
Any other ideas?
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snipped-for-privacy@spamdefense.mindspring.com says... :) Any other ideas? :) :) If your garlic spray is washing off you can mechanically remove the beetles with a small shop vac or by hand, repeat a couple of times a day until the numbers are down. Can go with a contact spray such as pyrethrin but will need to reapply as needed until numbers are down. If you go with diazinon it should be ok as long as it has a chance to dry, maybe go with a premixed so you don't have to mess with mixing.
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Lar. (to e-mail, get rid of the BUGS!!
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Try a roll of the nonwoven rowcover. It's very light-weight and easy to tack down. Keeps out all the bugs I've ever seen other than burrowing ones. There can be a problem of heat buildup in very hot areas in full sun. A few wire hoops might help hold it off the plants. Good in spring too when you want to hold in a little extra heat. Cats, dogs and rabbits don't seem to want to mess with it. Give it a try. Good luck. Gary

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