I just placed an order through Amazon a couple of days ago for $16 plus $6 shipping.
Below is what I ordered.
DIPEL PRO DF Biological insecticide BT 54% 1 POUND BAG by Valent USA
Dpel PRO is not the correct strain:
ACTIVE INGREDIENT:
Bacillus thuringiensis, subsp.
kurstaki, strain ABTS-351,
fermentation solids, spores, and insecticidal toxins* . . . 54%
OTHER INGREDIENTS. . . . . . . . . . . . . . . . . . . . . 46%
This is correct;
http://www.forestrydistributing.com/en/xentari-df-biological-insecticide-omri-listedXenTari DF Biological Insecticide, OMRI Listed
XenTari DF Biological Insecticide is a highly selective insecticide for use against larvae (worms) of lepidopterous insects. XenTari has outstanding efficacy against armyworms and diamondback moth larvae.
Active Ingredient: Bacillus thuringiensis,
subsp. aizawai, Strain ABTS-1857 54.0%