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Is Bacillus thuringiensis Organic?

Posted by tclynx 9 (My Page) on
Thu, Sep 13, 07 at 11:10

I was just wondering since the bottle doesn't have Organic certification stamped on it. I don't know if it is that using Bacillus thuringiensis is not "organic" or that this product just doesn't happen to have certification.

Also I notice that mosquito dunks are also BT. I'm starting to think there are probably different types of BT and I'm wondering if you need to get into specific subspecies to battle specific pests, in which case it is not as useful as I once though.


Follow-Up Postings:

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RE: Is Bacillus thuringiensis Organic?

  • Posted by jean001 z8aPortland, OR (My Page) on
    Thu, Sep 13, 07 at 13:20

Bacillus thuringiensis kurstaki (Btk) is used against caterpillars.

But mosquito dunks are Bacillus thuringiensis israelensis (Bti) and it's used against mosquito larvae.

In other words, the two products are different.


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RE: Is Bacillus thuringiensis Organic?

Ok, that clears up part of it.

Are these products concidered compatible to organic practices?


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RE: Is Bacillus thuringiensis Organic?

In most cases, yes. Some of the newest formulations of Bt do not meet the 'Certified Organic' criteria because of additives, etc. Commercial growers producing products labeled 'certified organic' always need to be careful of label restrictions for legal reasons. But any of the products that are available to the average homeowner are considered organic by any standards.


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RE: Is Bacillus thuringiensis Organic?

Thank you rhizo,
I'm not really worried about being certified organic but this was a point of interest to me. I'm just trying to learn as much as I can.


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RE: Is Bacillus thuringiensis Organic?

  • Posted by peggy_g Melbourne,Fl Z9 (My Page) on
    Thu, Sep 13, 07 at 22:15

This is such a good product for the organic gardener. As the previous posts states there are many types...for caterpillar, mosquitoes, etc. Fear not, this is a good product and at the heart of my organic arsenal for caterpillar that would wipe out my cruciferae, nightshade, and cucurbitaceae, crops. In the last 30 years I have heard of 1 person having a reaction to the additives in a product. This is so much not a don't loose sleep issue...Is the air safe, is the water safe...that is the realm you're worrying in. I give this a 100% good for the organic gardnerar....More then that, I couldn't garden organically, in my climate, without it. This product is a good guy....Hope that helps.


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RE: Is Bacillus thuringiensis Organic?

There is Bacillus thuringiensis - Kurstaki used to control many leaf chewing insects, Bacillus thuringiensis - San Diego used to control the larva of the Colorado Potato beetle, Bacillus thuringiensis - Israelensis used to control mosquitoes, black fly, and fungus gnat larva. There are some other strains of the Bacillus thurigiensis out there but these are the most common in use today. Since these all need to be ingested by the target pest where the bacteria spores then come to life, if the gut is the right one, and then digests the target insect from the inside out all of them are acceptable for use in an organic garden. They are fairly insect specific, and will not harm beneficial insects.


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RE: Is Bacillus thuringiensis Organic?

Thanks for all the replys.

Obviously the BT-Israelensis must be pretty tame on other creatures since I just discovered a couple little frogs living in my hydroponic tank which happens to have a mosquito dunk in it. I keep saving them and yet they keep retuning so I guess the hydroponic nutrient and mosquito dunks aren't bothering them too much.

Peggy g,
I definitely feel with you on the climate issue. I'm not too far away from you, I occasionally get called to drive over and work at the King Center on shows. I'm just up the NW corner of Orange County and it is so hard to get out and baby the warm weather crops right now as it is soooo hot.

Thanks again.


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RE: Is Bacillus thuringiensis Organic?

Here's how our provincial certifying body, Nova Scotia Organic Growers Association, classifies Bt in their materials list. I'd expect other certifying bodies to say the same thing or similar:
Bacillus thuringiensis (B.t.)
Allowed
Wettable powders and bait forms preferred. Liquid forms containing xylene or petroleum distillates are prohibited. Note that products (eg. seed potatoes, corn, etc.) that are genetically engineered to contain B.t. are not allowed (see genetically modified organisms)


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RE: Is Bacillus thuringiensis Organic?

  • Posted by peggy_g Melbourne,Fl Z9 (My Page) on
    Sat, Sep 15, 07 at 19:58

tclynx, Always nice to hear from someone who shares the same climate. I've been absent from the forums as I've become a beach bum: learning to windsurf this last year; now that we're into the fall planting, I'm back! I'll keep an eye out for your posts. Fl. is a great place to garden, but so different from the rest of the USA....and a challenge to create that happy, healthy, soil. I'm trying to hit the garden early and be out by 10 a.m....to avoid the melt!


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RE: Is Bacillus thuringiensis Organic?

  • Posted by jolj 7b/8a-S.c.,usa (My Page) on
    Wed, Mar 9, 11 at 19:41

I was wondering if you had a brand name for us?


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RE: Is Bacillus thuringiensis Organic?

Depends on what strain of Bt you are interested in. Dipel is a common brand for Bt kurstaki or for control of caterpillars. Summit or Aquabac are brand names for Bt israeliensis or mosquito/black fly larval control.

All are available online but can also be found at most full service nurseries or garden centers.


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