Mixing Chemicals?

[Diana Kulaga]

All:

I know I can mix certain fungicides with each other. My question is, which of the following, if any, would also be compatible with Orthene? Any? None?

Cleary's 3336; Subdue; Phyton; Physan.

Diana

[v_coerulea]

I know Physan, Phyton 27, Subdue, and Orthene all play nice together along with Distance and Enstar, Decathlon, Marathon II, and all the expensive miticides (Floramite, Pylon, Akari...). Some of these may not work well with fertilizers. I know Physan and fertilizer cause a fine precipitate which is probably taking some of the nutrients out of solution. Some of the others are hard to tell since they turn white in water solutions. The precipitate is what you want to look for in a reaction. I don't think any of them will fizz or go kaboom. The precipitate may be so fine it just looks like a cloudy solution. But it will begin to clump or form sandy-like grains on the bottom after sitting for awhile. Hope this helps some. Gary

[v_coerulea]

I'm not sure about Cleary's since I haven't used it. I would think that it would be fine is you've used them both before individually. Another consideration in mixing is "is it in dry or liquid form?" Most liquid form chemicals are dissolved in an organic solvent like petroleum distillate. One dose is probably ok. But when you add one dose of this and one dose of that you're adding up to a lot of doses of organic solvent. A plant may tolerate

1 dose just fine but not any more. This goes also for those guys that think 1 dose is good so 3 is probably better. So try for dry chemicals if at all possible and use as little as does the trick. As for your initial question, mix a small amount of each together and check for a precipitate in 1/2 an hour. Cleary's instructions state

"Tank Mixing Instructions: 3336 F is compatible with most commonly used pesticides. If tank mixing with other materials,add products in the following order:water soluble bags, wettable powders,dry flowables,liquid flowables,emulsifiable concentrates,and soluble materials such as fertilizers.No claim of compatibility with other products is implied.Do not tank mix with copper-containing materials or with highly alkaline pesticides, such as Bordeaux mixture or lime sulfur. Consult the intended tank mix partner product label for appropriate application rates and use instructions.Follow the label directions for the most restrictive of label precautions and limitations.This product cannot be mixed with any product containing a label prohibition against such mixing.Read and observe the most restrictive precautionary statements and other information appearing on product labels used in mixtures. 3336 F may be applied in conjunction with chemically neutral liquid fertilizers.Application in conjunction with highly alkaline fertilizers, such as aqueous ammonia,may cause a degradation of the pesticide,resulting in reduced performance and should be avoided.

Since Orthene is not in these categories spray away. Gary

[Pat Brennan]

Diana,

For tank mixing instructions you need to depend on the label more than what people on the internet say. If the labels do not agree with what I or anyone else says, follow the label.

I do not have an Orthene label, but it should tank mix fine with Cleary's and Subdue.

Although the Phyton label says it will tank with other chemicals, I am afraid to tank mix cooper based chemicals. I always spray Phyton by itself.

Physan's label is pretty weak, at least it now says it has more uses than just hard surfaces. I have seen Physan tank mixed with Cleary's and Subdue without any problems, but I have seen Physan not mix well with other stuff. Unless you feel you really need Physan in the mix and are will to do the compatibility test, I would avoid mixing it.

Here is the Cleary's label on tank mixing (from Cleary's web site).

Pat

Tank Mixing Instructions: 3336 WP is compatible with most commonly used

pesticides. If tank mixing with other materials, add products in the following

order: water soluble bags, wettable powders, dry flowables, liquid flowables,

emulsifiable concentrates, and soluble materials such as fertilizers. No claim of

compatibility with other products is implied.Do not tank mix with copper-containing

materials or with highly alkaline pesticides, such as Bordeaux

mixture or lime sulfur. Consult the intended tank mix partner product label

for appropriate application rates and use instructions.Follow the label directions

for the most restrictive of label precautions and limitations.This product cannot

be mixed with any product containing a label prohibition against such mixing.

Read and observe the most restrictive precautionary statements and other information

appearing on product labels used in mixtures. 3336 WP may be applied

in conjunction with chemically neutral liquid fertilizers. Application in conjunction

with highly alkaline fertilizers,such as aqueous ammonia,may cause a degradation

of the pesticide, resulting in reduced performance and should be avoided.

Tank mix products containing boron or releasable free chlorine will affect the solubility

of water soluble (PVA) film.Thoroughly rinse the spray tank of any boron

containing spray solution prior to adding any water soluble bags. Even minimal

carryover concentrations of boron in the spray tank may cause the water soluble

bag material dissolved in water to precipitate and form insoluble residue inside

the spray tank.