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Using BT

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Using BT

Post  hcrofts on 5/15/2011, 4:07 pm

I discovered this little fellow on a tomato plant today.




So, I think that this is a tobaco hornworm, and that it's time to apply some BT. I'm looking for advice on how to proceed.

What strength is recommended, what time of day to spray, should the ground be saturated, how often repeated, and so on?

Any and all advice would be appreciated.

Hank

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Re: Using BT

Post  sceleste54 on 5/15/2011, 9:12 pm

BT gets sprayed on the leaves..both upper and lower surface. Just follow directions on the bottle, it works great !! Doesn't matter when you spray. Within a day of spraying you will find the hornworms hanging on the leaves. They will turn black,die, and drop off. Bt is a good product because it will kill anything chewing on your leaves and fruit but will not kill the bees or you !!

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Re: Using BT

Post  shannon1 on 5/16/2011, 2:27 am

I I love you BT, if you have not already gotten some when you go shopping for it be sure to get BT that has not been combined with another pesticide pyrethrum for example it is natural and can be organic but it kills benifical insects like bees. Evil or Very Mad
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Re: Using BT

Post  hcrofts on 5/16/2011, 1:16 pm

Thanks for your help. I sprayed BT at dusk yesterday. There were dead worms already this morning.

While doing some serious looking in the garden, I found a cucumber with a bore hole and frass. Turned out to be a pickleworm. The remedy - BT. It looks like I will be spraying BT weekly.

Now, I too, am a fan of BT Smile

Hank

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Re: Using BT

Post  Bar B on 5/16/2011, 3:13 pm

What is BT?

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Re: Using BT

Post  pattipan on 5/16/2011, 3:41 pm

You must read this post about hornworm discovery -- funny!

http://squarefoot.creatingforum.com/t2470-i-know-what-a-hornworm-is-now#17556

pattipan
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Re: Using BT

Post  hcrofts on 5/16/2011, 3:51 pm

BT or Bacillus thuringiensis is a bacteria that has a harmful effect on many types of caterpillars. I don't know all the details, only what I've read on the internet regarding plant problems and solutions.

For way too much information on the subject try:

http://en.wikipedia.org/wiki/Bacillus_thuringiensis

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Re: Using BT

Post  hcrofts on 5/16/2011, 4:08 pm

Thanks for your post pattipan. What a great story - I think the author did a super job of capturing the emotion of dealing with a hornworm. Whew!

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