Use of fungicides, etc

colmlt(z6 Maryland)June 15, 2005

I would like to know when one should treat tomato plants with fungicides, etc. My plants seem very healthy. I bought a product called Fungicide by Garden Safe. It is supposed to have a fungicide, insecticide, and miticide in it. Should I spray them now? What other information should I know? I appreciate all of your feedback.

Thank you.

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farkee(Florida)

Hi Colmlt, I believe the product you have is Neem as it is from Garden Safe.

For use as a insecticide and miticide I would use when problems develop not preventatively.

For a fungicide I think answers may vary.
1) Begin using when conditions favor disease development.

2) Begin when the VERY first signs of a disease are discovered.

3) Begin when fruit begins to set as that is the usually start of disease development. (or a tad before fruit set)

4) Some people begin from the moment they put their plants out but I believe , in the case of daconil, this would put you over the maximum seasonal total application rate if it rains alot and you are frequently reapplying.

If I was using neem , I don't think I would wait until signs of foliar leaf spots so if fruit is setting I would begin spraying now according to the label directions. (by the way, I am curious, just what does the label recommend?) Best wishes , farkee

    Bookmark   June 15, 2005 at 4:29PM
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tomn66

Hi Farkee,
You mentioned that Daconil has a maximum seasonal total application rate. Where would you find this information? The instructions I have don't mention this.

    Bookmark   June 15, 2005 at 7:44PM
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farkee(Florida)

The maximum seasonal total application rate is quite high--
I read it on the back of a pre-mixed bottle of Daconil available in Lowes. It said for tomatoes it was 15. But since you asked and as I don't have the bottle I am not sure if that means limit to spraying 15 times or if it related to some other measurement like 15 pounds per acre or something like that. I thought it meant 15 times but I could be wrong. I am sure you can use daconil frequently ( every 7 to 10 days or something like that) but I am guessing ,like everything else, there is bound to be some recommended level as to how many times to spray during a season.

    Bookmark   June 16, 2005 at 12:46AM
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carolyn137(z4/5 NY)

4) Some people begin from the moment they put their plants out but I believe , in the case of daconil, this would put you over the maximum seasonal total application rate if it rains alot and you are frequently reapplying.

And I just read your followup remark as well.

There is no limit that I know of and I think the comment on that bottle might well have to do with the fact that it's pre-mixed. Diluted products often have a shorter shelf life than the concentrated preps.

Carolyn

    Bookmark   June 17, 2005 at 9:43AM
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