Cleary's 3336F Is it safe for all orchids?

[DavidCampen]

I think that 1/2 to 1 teaspoon is correct according to the label.

The Cleary 3336F label here (pages 6 & 7):
http://www.clearychemical.com/support/label/4172SL.pdf
states 12-16 fl. oz. per 100 gallons for foliar application or 8-16 fl. oz. per 100 gallon for soil drench application.

My dictionary says that a teaspoon is 1.33 fluid drams and that a fluid ounce is 8 fluid drams.

So converting the given application rates of 8 - 16 fl. oz. per 100 gallons to teaspoons per gallon we have:
8 - 16 fl. oz./100 gallon = 64 - 128 fl. dr./100 gallon
or 0.64 to 1.28 fl. dr. per gallon.
dividing fl. dr. by 1.33 to get to teaspoons we get:
1/2 to 1 teaspoon per gallon.

I dislike working in teaspoons so I multiply fluid ounces by 30 to get milliliters and then work in milliliters (a fluid ounce is actually 29.56 milliliters).

[silken]

Thanks David for backing up what I was thinking. In the end, I took a well marked ounce shot glass and measured 10 1/2 teaspoonfuls to make one ounce so given the rate of 8 to 16 fl. oz. per 100 gallons I figured .1 to .16 oz. per gallon and .1 is 1/2 tsp so I might use a little more but no more than 1 tsp for sure. Maybe 3/4 tsp. My method wasn't quite as mathematical or scientific but worked out the same in the end so now I feel more confident that I am not over-dosing my chids. And I will use a proper mask and rubber gloves before applying. Not sure if it is necessary but...

[RJSquirrel]

I would also like to add something helpful by Mr Motes who just happens to be our speaker aug 1st

Orchids need a hard drying out of the whole plant and roots on occasion. He says the purpose of this is to kill off bacterial and fungus that might be hiding or immune to inoculation by your preferred method(s). This also 'hardens the roots' making them stronger, stimulating growth and therefore less susceptible to fungus and bacterial infections in the future.
I find him very helpful and knowledgeable. His culture is for florida and you need to make the adjustments for your own needs but his guidelines apply to many.

Florida Orchid Growing, Month Advice, Dr. Martin Motes

[silken]

Originally Posted by RJSquirrel

I would also like to add something helpful by Mr Motes who just happens to be our speaker aug 1st

Orchids need a hard drying out of the whole plant and roots on occasion. He says the purpose of this is to kill off bacterial and fungus that might be hiding or immune to inoculation by your preferred method(s). This also 'hardens the roots' making them stronger, stimulating growth and therefore less susceptible to fungus and bacterial infections in the future.
I find him very helpful and knowledgeable. His culture is for florida and you need to make the adjustments for your own needs but his guidelines apply to many.

Florida Orchid Growing, Month Advice, Dr. Martin Motes

Thanks. Very useful information. I likely err on the side of too dry if anything. Things do get quite dry in between watering and I have only just started to water things a little more during the summer. But I agree. If the pot is always damp and can never dry out it is the perfect breeding ground for bacteria and fungus.

[HighSeas]

I read somewhere that Cleary's is the same as Thyomyl (sp). Is that correct? Does anyone know?

[silken]

Originally Posted by HighSeas

I read somewhere that Cleary's is the same as Thyomyl (sp). Is that correct? Does anyone know?

The active ingredient in it is Thiophanate-methyl.

[DavidCampen]

Thiomyl Systemic Fungicide

[Ray]

Originally Posted by RJSquirrel

I would also like to add something helpful by Mr Motes who just happens to be our speaker aug 1st

Orchids need a hard drying out of the whole plant and roots on occasion. He says the purpose of this is to kill off bacterial and fungus that might be hiding or immune to inoculation by your preferred method(s). This also 'hardens the roots' making them stronger, stimulating growth and therefore less susceptible to fungus and bacterial infections in the future.

Unfortunately, drying probably does little to kill bacteria and fungi. They can stay dry and dormant for a long time, and resume growing their population once moist again.

If I recall correctly, David is a doctor, so hopefully he'll chime in.