BT Thuricide (Bacillus Thuringiensis)

[Buddah Watcha]

Anyone out there have experience using this product while growing outdoors?!

I spotted a few caterpillars over one of my budding plants and was recommended this product to use against it.

I'm thinking of using around 2tsp/gal and foliar spray the plant.

If anyone has any information or experience please chime in!

Thanks! Peace!

 

[skullznroses]

it works best... really the only thing for tent cattys

a few years ago I was working as a salesman at a organic groe shop and Massachusetts had the worst tent cattepillar outbreak in the last 50 years. Sold my ass off to get that shit out the door.

 

[Buddah Watcha]

Thanks for the quick reply skullz...

Is it safe to apply mid flower? I think I got not many options... going to the spot this week and spray the girls that were infected...

 

[Sinkyone]

Yes it can be applied mid flower. Use it early, it takes time for it to kill the caterpillars, if the infestation is already in full swing quite a bit of damage can occur before the bT does it's thing. It is most effective as a preventative IMO. Be sure to spray all your plants, not just the infected ones.

 

[Buddah Watcha]

THanks Sinkyone. I spotted 2 inch worms walking on the buds, they were green and small... I'm sure i missed some... I hope the damage its not too bad. Anyways, I'll be there soon spraying them out!

 

[canabisflower]

I just posted this in the infirmary in response to the same question:
"My 1st outdoor grow went surprisingly well until I hung those fat buds to dry and the little green worms were lowering themselves down from the buds the next day on spider web thin string. Inside the normal looking colas I found rot. I found the explaination and preventive measure on overgrow. BT !! Its a bacteria found naturaly in soil , I feel safe useing it.
Eleven years & 11 grows later I've not had the problem again . Thankyou all you info sharing growers. I spray twice a week from when buds start forming. The moths lay their eggs and the bud forms around them, once they hatch the little demons are protected and well fed.
I would definitely look inside the buds and remove any you see along with any rot.....then spray to kill any eggs.
Good Luck 2 u !"
If I were you and seeing green worms on the outside of the bud I would be poking around inside the colas to see if there's anything feeding, and while I was in there spray so the BT solution runs down the stem.

 

[TheBudologist]

BT works really well, but only if you spray the caterpillars/worms when they're less than about 2inches long, after that their outer shell gets increasingly stronger and they can withstand quite a bit of pesticides.

The best time to spray is when your plants are just starting to flower and you begin to notice hairs missing where the little baby worms are munching at, they are A LOT easier to kill the smaller/younger they are.

I just ordered something that was recommended to me by a very seasoned outdoor grower.

Conserve SC

its a bit pricey but it's supposed to exterminate all worms. check it out

http://www.dowagro.com/turf/products/insecticides/conserve.htm

 

[TheBudologist]

Anyone out there have experience using this product while growing outdoors?!

I spotted a few caterpillars over one of my budding plants and was recommended this product to use against it.

I'm thinking of using around 2tsp/gal and foliar spray the plant.

If anyone has any information or experience please chime in!

Thanks! Peace!

i sprayed my outdoor girls a few nights ago at 4tsp/gallon and they didn't burn or cringe at all. In your case since your worms are big i would suggest using AT LEAST 4tsp/gallon.

 

[OldRod]

That is one if not best stuff to fight with that caterpillar.

It helps in prevention but its works very good if plants are infected.
Last spraying 3 weeks before harvest, until that once in 10 days.

My plants are in preflowering and I sprayed them already, prevention.

Just go with BT and relax ....

XenTari is a biological compound based on spores of the bacteria Bacillus thuringiensis var. aizawai (Bt).
XenTari works against several species of butterfly and moth caterpillars that can cause serious damage to crops.
The product is a water dispersible granule. By eating sprayed parts of the plant the caterpillars digest the bacteria.

Inside the caterpillar's intestines, the bacteria produce spores and protein crystals.
While digesting crystals in the intestinal canal, a harmful toxin is released.

This toxin damages the intestinal wall and stops the caterpillar from eating as soon as one hour after intake, as the jaws become paralysed.
Infected caterpillars move slowly, change colour and shrivel.
They die 2 to 5 days after intake of the bacteria.

Dead specimens hang with their hind legs still attached to leaves.
XenTari has a persistence period of 10 days: because young caterpillars are located on the youngest leaves,
repeating the treatment strongly depends on their speed of growth.

In open field cultures the treatment must be repeated after rain.

 

[sutra1]

I use BT and it is very effective. It works when the caterpillar eats veg growth containing the BT. BT breaks down in sunlight so use it late in the afternoon or on cloudy days. My mix ratio is 4tbs to 1gal.

 

[SeaMaiden]

Anyone out there have experience using this product while growing outdoors?!

I spotted a few caterpillars over one of my budding plants and was recommended this product to use against it.

I'm thinking of using around 2tsp/gal and foliar spray the plant.

If anyone has any information or experience please chime in!

Thanks! Peace!

I haven't used that specific product, but a combination of Bt treatment along with Spinosad, alternating bi-weekly applications, is begun every season here the moment bud-set begins. Otherwise, you ARE going to lose a good amount of your very best buds to the rot they cause. Even with diligent treatment you have to count on losing some bud material, and in my experience they always go for the top-most buds, which, again in my experience, are the best ones the plant has produced.

 

[SeaMaiden]

BT works really well, but only if you spray the caterpillars/worms when they're less than about 2inches long, after that their outer shell gets increasingly stronger and they can withstand quite a bit of pesticides.

Just an FYI; Bacillus thuringiensis (spp incl.) is effective via ingestion.

The best time to spray is when your plants are just starting to flower and you begin to notice hairs missing where the little baby worms are munching at, they are A LOT easier to kill the smaller/younger they are.

I just ordered something that was recommended to me by a very seasoned outdoor grower.

Conserve SC

its a bit pricey but it's supposed to exterminate all worms. check it out

http://www.dowagro.com/turf/products/insecticides/conserve.htm

Conserve is a non-agricultural formulation of Spinosad. I personally would advise going with an agricultural version, especially if you're going to use a regulated and controlled substance. The OTC versions, while not exactly cost-effective for large scale cultivation, might be the better recommendation here.

Also, it needs to be rotated with other biological controls to really be effective or we're going to begin seeing Spinosad-resistant bugs soon, just as we have Bt-resistance quickly developing (mostly due to GMO commodity crops).

While not labeled for use on cannabis (remember, nothing is here in the US that I've found, just as nothing is labeled for use on quinoa as of this writing), DiPel is another product that can be used assuming one can legally acquire it. The form I have is a dry flowable powder that's mixed into a suspension. The suspension requires regular agitation, so it's good to have a tank agitator installed.

 

[Buddah Watcha]

Thanks for all the great advise guys. I did spot 2 green worms, under an inch in length...

Is it a good idea to mix some Spinosad with the BT and apply both simultaneously? Or is it better to take turns, BT one week and Spinosad the other?!

Got both products in hand... so might as well use em...

Please advice! Thanks again!

 

[SeaMaiden]

No, I advocate for alternating the products. This helps prevent the insects building a resistance so quickly. If I run across any other product that can be included in an organic IPM rotation I'll try to remember to post it up here.

 

[FlowerFarmer]

A mixture of Spinosad (Monterey Garden Insect Spray) @ 1TBL/32oz and Azatrol @ 1tsp/32oz works very well at ridding your plants of caterpillars and many other pests.

 

[canabisflower]

The green worms I'm preventing with BT come from eggs laid by moths. One year I was reminded to spray by a bunch of reddish moths hovering around my plants. I've always seen these little green worms lowering themselves from the trees around here on very thin threads in the fall. So I always spray the vegetation around my garden also. Must be different species in other areas.....I never saw one before harvest and then it was too late. Never had them again since using BT. Maybe twice a week is too often but since sunlight destroys the bacteria I'll feel safer that way.
peace_

 

[MajLeeStoned]

Great info in this thread for all OD growers. I have used both BT and Spinsad and they both work very well. I prefer and use Spinosad because it is practically orderless. After many seasons of use the smell of BT and Neem oil is just unpleasant to me and Spinsoad products offer some welcome relief.

 

[Buddah Watcha]

Heres a pic of the lil green basterd

Thanks for all the advice!

Peace!

 

[OldRod]

You have green one I have one with camouflage.

Name of your (our) enemy is Spodoptera Exigua
http://en.wikipedia.org/wiki/Spodoptera_exiguaL I N K

Dont mess it with Bud Worm, its not a same.

 

[All Cacti Are Beautiful]

Old thread but this feels like the right place to ask this question. It seems most spray up to the week before harvest and sunlight quickly deteriorates it.

Does any residue stay behind and does bt alter flavor and smoothness of the buds when smoking them? I have not seen anyone indicating this but would like to know before applying.