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Country Discussion Topics
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What is the newest insecticide for Colorado Potato
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RayP(MI)    Posted 07-08-2003 at 18:41:28       [Reply]  [Send Email]
After being away from my garden for too long, I'm trying to reclaim it from the weeds. The place is infested with the CPB - worse than I've ever had it before. They're even eating the weeds! Problem is that I'm in a potato growing area, and they probably migrate from other fields. The other problem is that the little buggers are imune to most of the popular insecticides. (Remember Darwin? - those that survive reproduce.) Anyway, I need a small amount of insecticide, for a small garden. Most of the growers here use custom applicators, and have it applied by airplane. The newest insecticide's probably not available for gardeners. Last time I checked a lawn & garden store, some high school kid refered me to their old dog-eared manual and the materials they recommended were older than the kid! what's new, effective, cheap, and available?

Tom A    Posted 07-09-2003 at 13:43:27       [Reply]  [No Email]
I use two things here.

First, I start with a version of Bt that is targeted at the CPB. It is very effective, but only works on the larva not the adults. So I start spraying it as soon as I see the first larva. Takes about 3 days or so and they all kick off.

Second, I dust with 1% rotenone powder. Not new, but it kills the adults in a couple of hours without fail. Have to re-dust about once a week or 10 days but for a garden it isn't too bad. It is also effective against my other bad garden pests: cabbage loopers and flea beetles.

Tom A

RayP(MI)    Posted 07-09-2003 at 15:22:49       [Reply]  [No Email]
Tom, More infro on the Bt, please - name, availability, etc>>>> Thanks!

Ron, You hit it on the head - applicator's license! My row is only about 200 yards long! And for that I need a license to buy an effective pesticide??? (By the way, sevin is pretty well ineffective here as of a few years ago, darn Darwin, anyway!)

Ron/PA    Posted 07-09-2003 at 09:26:44       [Reply]  [No Email]
You may find that Sevin, dog eared and as old as it is, may still be your best solution. It is normally used by comercial growers as a season ending spray, hence the beetles are not immune to it. Don't give up on the old remidies, some times they work 'cause the new kids on the block quit using them. However if you don't want to try them, let me know, and I'll send you some recomendations, provided you get your applicators license, or can talk one of your neighbors into selling you some illegally!

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