Fungicide safety for orchid use - Orchid Board

tolumnia · #1 06-23-2011, 02:45 PM

First, this is a bit of a cross post, but I haven't gotten any feedback in the beginners section. Sorry.

There seems to be a lack of options for fungicide where I live this time of year. I tried to find copper but could not so I ended up with Spectracide immunox. The chemical in it is myclobutanil.
Has anyone used this on their orchids? If not and I decide to experiment does anyone have tips?

Thanks in advance.

tucker85 · #2 06-23-2011, 02:55 PM

I haven't used that one but I've used a couple different premixed fungicides in the spray bottles from Home Depot that were designed for use on flowering plants. Neither of them caused any harm to the orchids.

Queenslander · #3 06-23-2011, 06:21 PM

Quote:

Originally Posted by tolumnia

First, this is a bit of a cross post, but I haven't gotten any feedback in the beginners section. Sorry.

There seems to be a lack of options for fungicide where I live this time of year. I tried to find copper but could not so I ended up with Spectracide immunox. The chemical in it is myclobutanil.
Has anyone used this on their orchids? If not and I decide to experiment does anyone have tips?

Thanks in advance.

I use Hy-san, eco friendly fungicide. Whatever the orchid nurseries use.

Orchidjim · #4 06-23-2011, 07:35 PM

Hi, Firstly, do you know that you need a fungicide ? What is the problem you are trying to solve? There are quite a few fungicides available to orchid people, however, some target different pathogens. Phyton 27, Physan, Dithane M-45 and a host of others are good for taking care of most of the problems. They are all available online, too!

cday2inflorida · #5 06-23-2011, 07:57 PM

I use Dithane M-45 as a fungicide and Physan as a preventive.

Ray · #6 06-24-2011, 08:47 AM

As a preventive measure, I highly recommend Zero-Tol. It is a great broad-spectrum, contact algaecide/fungicide, and exhibits no phytotoxicity whatsoever.

keithrs · #7 06-24-2011, 06:57 PM

Quote:

Originally Posted by Ray

As a preventive measure, I highly recommend Zero-Tol. It is a great broad-spectrum, contact algaecide/fungicide, and exhibits no phytotoxicity whatsoever.

Do you know if there's a difference between Zerotol for pro's and the Zerotol RST?

Ray · #8 06-25-2011, 09:04 AM

Quote:

Originally Posted by keithrs

Do you know if there's a difference between Zerotol for pro's and the Zerotol RST?

Just the concentration of the as-shipped product.

Zero-tol in the 2.5 gallon (smallest) container is 27% active ingredients, which being oxidizers, makes it a DOT hazardous material for shipping. The RTS (Ready To Spray) quart bottle is 6.7%, making it non-hazardous.

The application concentration would be the same, so when I refill the RTS bottle from my big jug, I make a 25% solution to use in the 150:1 RTS sprayer.

tolumnia · #9 06-24-2011, 11:56 AM

I am having an issue with black root tips. A fungus was the only theory I got that I haven't already checked for. here is a link to the original thread: Black root tips

If anyone in this section has any other ideas I would love to hear them.

Thanks for all the input so far!

keithrs · #10 06-24-2011, 03:37 PM

I had a problem with root tips turning black and turned out to be the water. Went to ro and problem solved. Your water may be soft but you can still have high TDS. You need to find out what your TDS is. TDS meter aren't that pricey and give you good feed back on what to do.

Do you have a water softer?