The label for Truban WP gives a wide range of use at 3-12 ounces per 100 gallons of water as a drench. Has anyone used a higher mixing rate in that range and have you experienced any toxicity or Poinsettia problems afterwards? I am ordering some in for the end of the Poinsettia crop and with such a wide range I do not know how much to order. Naturally I would like to just use the 3 ounce rate per 100 gallons to save money but wonder what rates others may use if they do indede use this product. Thanks...Michael Pawelek

I have used Truban at 5-10 ounces per 100 gallons. The trick is to water it in immediately following the drench to push it through the soil. I prefer Banrot because of it covers more diseases and costs around the same.

We use Truban EC those rates range 4-8 oz per 100 Gal. We have had some problems with burning roots at the high rate especially during hotter weather. We think that 6 oz is enough and is safer. When we see active Pythium we will apply every 3 weeks with lower rates 3-4 oz per 100 gal applied as a thourough watering.

I like to use the wp formulation at 8oz. per 100 gals. Lower rates do not seem to work as well. Also, late in the crop, I prefer to use Subdue Maxx at 1oz. per 100 gals. No residue problems. For some reason, Subdue Maxx has been more effective for pythium control, for us, than Truban this season. The key is to keep your EC levels down in the root zone, especially if you are growing Prestige.

Good comments from everyone.....

The only thing we would add is that Truban does contain a lot of salts and can drive your EC up a little.

A general rule to follow when trying to decide what rates to apply would be for prevention keep rates on the low to moderate end of the range. For suppression and with high disease pressure you should use the higher rate recommended. Hope this helps.....

Hey Micheal:

According to Ann Chase, you need to use the high rate on the Truban label (12 oz) to be effective. Her comment was the lower rate wasn't bullet proof for prevention and clean up. I always use the highest rate and have not had any trouble. I know it does cause your EC to rise, as long as that is already in range, I think you will be fine at the highest rate.

I checked pricing this fall, and according to my supplier, BWI, Truban EC is the cheapest of the three products (Truban WP, Truban EC, and Terrazole) to apply at the full rate. I like the EC better because it stays in solution better than the other products with the clay carriers.

Anyone else using Banrot, you might watch out if you have an existing pythium problem because the Etridiazole (a.i. which attacks pythium in Banrot) is not at the full rate. My Scotts rep always told me to spike it with more Truban to get the Etridiazole up to the full rate. Just passing along info.

Good luck. Marty

Thanks to everyone with comments on the Truban rates!

Marty, I read an article quite a few years back that stated exactly what you wrote above that the regular Banrot formulation did not contain enough Etridiazole to be really effective on root rots. When I used Banrot in the past I always added some extra Truban to the mix. I wonder why the manufacturer has not changed the formulation after all these years??? I used to mix (according to the article)6 ounces Clearys 3336 and 3 ounces of Truban together in 50 gallons of water to make my own home brew "Banrot". I could mix it stronger and at a cheaper price than Banrot but I do not know if that is the case now.
According to the label the Clearys 3336 should take care of...
Botrytis
Sclerotinia
Fusarium
Rhizoctonia
Cylindrocladium
Thielaviopsis
And the Truban Should take care of...
Pythium
Phytophtora

......Michael Pawelek

This message has been edited. Last edited by: Michael Pawelek,

I am curious as to the comments above about Truban raising the soluble salts levels in the soil. I carry my pH and E.C. meter with me throughout the day as I water/feed to make sure the injector is working properly and this morning when I mixed 10 ounces of Truban in 100 gallons of water for a drench my E.C. meter only showed an increase in the mix from a .65 mmhos in my well water to a .7 mmhos in the Truban drench mix. This is a neglegible rise in E.C. so I wonder what is happening here? The meter works just fine as my well water and feed mix numbers are normal.....Michael Pawelek