Physan 20 Treatment Instructions Needed

[gmdiaz]

Hello all,

Diane and I are ready to try a Physan 20 treatment on one of her (in bud) dendrobiums. . .and need to know what measurement to use? I think we'll need to do a dunk in a big glass bowl, since we're at work.

Ross, need your help!

P.S. Diane has her new plant stand in place but I forgot my camera. I'll bring it to work tomorrow and take pics.

[gmdiaz]

Well, we went with 1-1/2 teaspoons to one gallon of RO water (the bottle calls for 2 teaspoons per gallon) . .we dunked the plant but just dripped and washed the leaves & bulbs with the solution.

I didn't get any on the flower buds.

We'll try spraying the solution next time. . .we didn't have a spray bottle. lol

Wonder if one treatment usually does it or if you have to do repeat treatments.

[Ray]

I use 1 tsp/gal, monthly

[Ross]

Originally Posted by gmdiaz

Well, we went with 1-1/2 teaspoons to one gallon of RO water (the bottle calls for 2 teaspoons per gallon) . .we dunked the plant but just dripped and washed the leaves & bulbs with the solution.

I didn't get any on the flower buds.

We'll try spraying the solution next time. . .we didn't have a spray bottle. lol

Wonder if one treatment usually does it or if you have to do repeat treatments.

I use 1 tsp per gallon for routine treatment as directed on bottle. For harder jobs like developing mold on the backdrop of my orchidarium I use a bit stronger and make sure to not treat orchid leaves. If using as a medium drench, 1.5 tsp shouldn't hurt. Directions say retreat in 7 days. I apply more often if I feel the need.

[gmdiaz]

Many thanks.

We'll tone down the quantity per gallon!

Diane's orchid that we treated actually looked better today already. We'll look at it carefully again, next week to see if it needs a misting of the Physan treatment.

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[Shirley]

Originally Posted by gmdiaz

Well, we went with 1-1/2 teaspoons to one gallon of RO water (the bottle calls for 2 teaspoons per gallon) . .we dunked the plant but just dripped and washed the leaves & bulbs with the solution.

I didn't get any on the flower buds.

We'll try spraying the solution next time. . .we didn't have a spray bottle. lol

Wonder if one treatment usually does it or if you have to do repeat treatments.

gmdiaz,
Just to clarify, what is the reason that you're treating the Den. with Physan 20? Disease?

Shirley

[nenella]

Silly question ?...
But can anyone tell me what the equivalent measures are in ml/L ? thank you

[gmdiaz]

Originally Posted by Shirley

gmdiaz,
Just to clarify, what is the reason that you're treating the Den. with Physan 20? Disease?

Shirley

There was some significant amounts of "sooty" black, mildew? on the sheath & brownish-black spots on some of the leaves. One of the leaves was yellowing that had the worst spots. And there was quite a bit of algae, which wasn't really causing any problems but made Diane and I think that the orchid just needed a treatment for having been in a really humid greenhouse environment. Diane had just bought the plant from Fantasy Orchids recently.

[gmdiaz]

Originally Posted by nenella

Silly question ?...
But can anyone tell me what the equivalent measures are in ml/L ? thank you

Well, our teaspoon measurement of the Physan would be about 5 ml for you. . .and our gallon would be 3840 ml of water.

Somebody double check me but I THINK that's right?

[Ray]

Close, but not quite... A gallon is 3785 ml.

1 teaspoon per gallon is 1.3 ml/L