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How much TDZ do you want?  I have never found it useful in Hosta TC, but it does work well with Daylilies.  I have never used it in the field.  I have one of those infamous 5 LB bags of DROPP, which for TC is a five-lifetime supply.  If you want a small amount to experiment with, I can send you some.  By the way, you can put TDZ into solution the same way you do BAP (titrate it into solution with concentrated base).  The powder just settles out.  The stuff is powerful, and it has a long residual action, so you may get some unexpected results.  With Hosta, it tends to break down variegation chimeras, as it promotes adventitious buds.
50% WP means that you need twice as much (by weight) as BAP to get 1000 PPM.  One milligram per kilogram (1 liter is a kilogram of water) is one PPM, so 1 gram/liter (2 grams DROPP) is 1000 PPM.  0.44 mg/ml DROPP is approximately 1 mM TDZ.
Jim Anderson
Winterberry Farms TC
-----Original Message-----
From: owner-hosta-open@hort.net [mailto:owner-hosta-open@hort.net]On Behalf Of jwessel@infi.net
Sent: Sunday, September 01, 2002 12:52 PM
To: hosta-open@hort.net
Subject: TDZ

After reading the Journal HostaScience articles on hosta propagation I am very interested in trying some experimenting with Thidiazuron (TDZ) .

Beings that I live in cotton country, I found a local source for DROPP produced by Aventis. Dropp cost about $62 a pound in 50% WP form with a minimum purchase of 5 lbs.

I would like to share the cost with 4 other people if there is an other interest. Please contact me directly if you are interested. 

If anyone could supply the dilutions formula to get a 1000 PPM from the 50% WP, it would be appreciated.

John Wessel

Wessel Nursery
505 Gawain Court
Virginia Beach, VA. 23464
Fax 757-424-6435



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