The Two Most Common Types of BT (BTk and BTi) Used in Gardening

Dutch · January 14, 2017

BTk (k as in katerpillar) Bacillus Thuringiensis var. kurstaki
Used on the following;
Cabbage worm and cabbage looper
Tomato and tobacco hornworm
European corn borer
Alfalfa caterpillar and alfalfa webworm
Leafroller
Achemon sphinx
Tent caterpillar
Fall webworm
Leafroller
Red-humped caterpillar
Spiny elm caterpillar
Western spruce budworm
Pine budworm
Pine butterfly
Gypsy moth

Some common brand names of products containing BTk below;
Bonide Bacillus Thuringiensis
Bonide Thuringiegsis (BT) Concentrate
Ferti-lome Dipel Dust
Hi Yield Thuricide Concentrate
Safer Brand Bt Worm & Caterpillar Killer
Safer Garden Dust w/Bt

BTi (i as in insect) Bacillus Thuringiensis var. israeliensis
Used on the following;
Fungus gnats
Black flies
Mosquitoes

Some common brand names of products containing BTi below;
Bonide Mosquito Beater WSP
Gardens Alive Knock Out Gnats Granules (fungus gnat larvae control)
Gnatrol (fungus gnat larvae control)
Summit Mosquito Bits
Summit Mosquito Dunks

Dutch

salix · January 15, 2017

Thank you Dutch, for that interesting, succinct and easy-to-remember information.

kayrobbins · January 15, 2017

Thanks for posting this. It makes it easy to know which to use.

January 14, 2017	#1
Dutch Tomatovillian™ Join Date: Jan 2011 Location: S.E. Wisconsin Zone 5b Posts: 1,831	The Two Most Common Types of BT (BTk and BTi) Used in Gardening BTk (k as in katerpillar) Bacillus Thuringiensis var. kurstaki Used on the following; Cabbage worm and cabbage looper Tomato and tobacco hornworm European corn borer Alfalfa caterpillar and alfalfa webworm Leafroller Achemon sphinx Tent caterpillar Fall webworm Leafroller Red-humped caterpillar Spiny elm caterpillar Western spruce budworm Pine budworm Pine butterfly Gypsy moth Some common brand names of products containing BTk below; Bonide Bacillus Thuringiensis Bonide Thuringiegsis (BT) Concentrate Ferti-lome Dipel Dust Hi Yield Thuricide Concentrate Safer Brand Bt Worm & Caterpillar Killer Safer Garden Dust w/Bt BTi (i as in insect) Bacillus Thuringiensis var. israeliensis Used on the following; Fungus gnats Black flies Mosquitoes Some common brand names of products containing BTi below; Bonide Mosquito Beater WSP Gardens Alive Knock Out Gnats Granules (fungus gnat larvae control) Gnatrol (fungus gnat larvae control) Summit Mosquito Bits Summit Mosquito Dunks Dutch __________________ "Discretion is the better part of valor" Charles Churchill The intuitive mind is a gift, and the rational mind is a faithful servant. But we have created a society that honors the servant and has forgotten the gift. (paraphrased) Albert Einstein I come from a long line of sod busters, spanning back several centuries. Last edited by Dutch; January 14, 2017 at 10:35 PM. Reason: Format

January 15, 2017	#2
salix Tomatovillian™ Join Date: Dec 2007 Location: north central B.C. Posts: 2,310	Thank you Dutch, for that interesting, succinct and easy-to-remember information. __________________ "He who has a library and a garden wants for nothing." -Cicero

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January 15, 2017	#3
kayrobbins Tomatovillian™ Join Date: Dec 2013 Location: Jacksonville, Fl Posts: 820	Thanks for posting this. It makes it easy to know which to use.