New Fungicide Thats Rainfast!

[amideutch]

Came across this new product by Syngenta called "Revus". Do to it's newness there isn't much info on environmental impact but it looks promising. Don't think it qualifies as organic but the one thing that caught my eye is the following comment.
(Revus is rainfast as soon as the spray deposit is dry. In trials, where 80mm of rain was applied artificially an hour after application, Revus still achieved complete control of blight 15 days after application). Those who live in environments where organic controls just don't work due to climatic conditions this sounds promising. A link, Ami
http://www.farmersguardian.com/story...storycode=9397

[dcarch]

Thanks Ami.

I am always curious about one thing reguarding (non-systemic) spraying of plants.

In the most active growing phase, I have tomato plants growing more than 1 1/2" per week. I don't know what percentage of total new surface area this would represent for stems and leaves. I would assume these new surface areas will not be protected, unless you spray more frequently.

dcarch

[amideutch]

dcarch, very true. But the frequency of spraying would be far less than products like Daconil where spraying on a daily basis is not uncommon. Ami

[carolyn137]

Originally Posted by amideutch

dcarch, very true. But the frequency of spraying would be far less than products like Daconil where spraying on a daily basis is not uncommon. Ami

Not if you use the Daconil that's sold with spreader sticker or you get the Daconil without it which is much more common and add your own spreader sticker to it.

But I do understand the intent is to go organic and I confess that I didn't read the link to see what was in that product you mentioned.

[tomatoaddict]

Thanks for the info Ami. That looks promising. I know Syngenta is the company that came out with the Kumato tomato.

[amideutch]

Spreader/stickers do make the product adhere to the plant which they are designed to do but as to keep the product viable after being rained on and remaining effective for 2 weeks I don't think so. In the case of Daconil Weather stik here is a link and check out the first label. I didn't see any recomendations on it for use with vegetables at all. There is some interesting reading on the label. Ami
http://www.syngentaprofessionalprodu...Weather%20Stik

[carolyn137]

Ami, I did look at the link and you'll note that the label they show is for a 59% Daconil that's for Turf and lawn care.

But Ortho sells the proper 29% Daconil plus sticker or without sticker for use on edible crops.

If you look at the MSDS sheet at EXTOXNET you'll see that Daconil is made by neither Syngentea or Ortho or any of the other brands under which it's sold. I forget the name of the company that does manufacturer it right now. And all the others just make up different formulations of it to be used for different circumstances and situations.

Bravo is a case in point. I'ts for edible veggies but has a higher daconil concentration b'c it's for use in professional large scale sprayers.

I know that spreader sticker does help the molecules stick to the leaf surface but I haven' reserached it to see just how long it does stay around. One of the reasons for adding spreade/stickerr is so that it will withstand rains.

[feldon30]

For the reason dcarch just posted (rapid plant growth), Daconil, and really ANY anti-fungal should be applied once per 5-7 days.

I use Daconil once a week at 0.12% (1/8 of one percent) concentration.

Anyone using Daconil at 59% concentration on a daily basis deserves to get sick.

P.S. I will never eat a vegetable grown with a systemic fungicide. Can we say liver damage i.e. Lotrimin?

[amideutch]

Feldon, this is a quote from one of your previous posts concerning Daconil application. Ami
06-04-2007

"Daconil is hardly rainproof. The bottle says to apply every 7-10 days, but it may be necessary to spray twice or even three times during a week because of torrential rains".

The point I'm trying to make is you need less applications with this new fungicide "Revus" than you would with Daconil. Like I said the jury is still out concerning environmental inpact from its usage but I'm just passing along info concerning a new product. Take it or leave it. Ami

[Suze]

Confused here. Is Revus systemic, or just merely rainfast / rainproof? Rainfast (to me) could mean that it makes a good, solid coating on the foliage that simply won't wash off, or it could also mean that it absorbs into the foliage somewhat. I did look at the link, but am still unsure.

As a side note, Quadris is a systemic approved for veg crops that I have heard and read some good things about, but really haven't had the chance to read up more on re toxicity studies, etc.

Suze

[feldon30]

I will certainly stay tuned to see how Revus does.