Bacillus Thuringiensis (Bt) Products

 Brand new insect control technology!

It is called Spinosad and it is considered better than Bt.  Eventually it will probably repalce Bt

Spinosad Garden Insect Spray 32 oz. by Monterey

by Monteray

  • Organic active ingredient, produced by fermentation
  • New chemistry for insect control
  • B.t. replacement, more effective pest control
  • Can be used on vegetable & fruit crops, ornamentals, and turf
  • 32 oz. Concentrate

Description: Spinosad is a relatively new insect killer that was discovered from soil in an abandoned rum distillery in 1982. Produced by fermentation, Spinosad can be used on outdoor ornamentals, lawns, vegetables and fruit trees, to control caterpillars, thrips, leafminers, borers, fruit flies, and more. Spinosad must be ingested by the insect, therefore it has little effect on sucking insects and non-target predatory insects. Spinosad is relatively fast acting. The pest insect dies within 1 to 2 days after ingesting the active ingredient. Will not persist in the environment. Sunlight and soil microbes break it down into carbon, hydrogen, oxygen and nitrogen. Classified as an organic substance by the USDA National Organic Standards Board. OMRI Listed for use in organic production. Controls Moth and butterfly larva including Gypsy moth, codling moth, leaf miners, bagworms, tent caterpillars, borers, thrips, Colorado potato beetle larva, leafrollers, webworms, armyworms, sawflies, gall midges, whiteflies, stinkbugs, harlequin bugs, squash vine borer, fruit flies and more. Application Recommendations: MIXING AND APPLICATION (Shake well before use.)

MONTEREY GARDEN INSECT SPRAY may be applied with trigger sprayer, hand-held, backpack, or hose-end sprayers. Use a hose-end sprayer that can be adjusted to provide a dilution ratio of about 2,0 fl. oz. (4 Tbs.) of MONTEREY GARDEN INSECT SPRAY per gallon of spray. See Hose-end Sprayer Directions below if this product is packaged in hose-end sprayer. Add the required amount of MONTEREY GARDEN INSECT SPRAY to the recommended amount of water, mix thoroughly, and apply uniformly to both upper and lower surfaces of plant foliage. It is recommended to mix only as much spray as needed for a single treatment. In vegetable gardens it is recommended to use not more than 3.0 gallons of spray for 1,000 square feet of area.


What is Bacillus thuringiensis (Bt)?

Bacillus thuringiensis, usually referred to as "Bt" (pronounced “bee-tee”), is a naturally occurring bacterium that is lethal to most leaf-eating caterpillars on trees, shrubs, flowers, and vegetables.

Bacillus thuringiensis variety kurstaki (B.t.k.) is the general purpose material that homeowners buy when they see just the words Bt or Bacillus thuringiensis without the variety name attached. This is the type of Bt that is appropriate for home landscape use to kill caterpillars. As you can see on the left, there are also varieties designed to kill mosquitoes or potato beetles.

Bt is harmless to all other insects, animals, and humans. It comes in powder form for use as a dust or, diluted with water, for use as a foliar spray. It is also available in liquid form. It is sprayed or dusted on leaves of plants that are under attack by caterpillars so that the pests will ingest the bacteria as they eat the leaves. The Bt causes paralysis of the caterpillar's digestive tract, causing it to stop feeding within two hours. Within a day or two, certainly no longer than 72 hours, the caterpillars die.

For information about how to use Bt in the home landscape see “Using Bacillus thuringiensis”.

Safer Brand 5160 Caterpillar Killer with BT - 8-Ounce Concentrate

by Safe

  • Kills caterpillars, gypsy moth larvae, worms and cabbage loopers
  • Effective method of eliminating your garden or field of the tomato hornworm without environmental concerns or harm to wildlife and beneficial insects.
  • It is recommended that this product be applied late in the afternoon or on cloudy days since B.t. breaks down in the sunlight.
  • OMRI Listed and compliant for use in organic gardening
  • Safer Brand is the leader in alternative lawn and garden products.
After consuming, caterpillars stop eating and die within a few days. Use in late afternoon or on cloudy days since the BT breaks down in sunlight. Controls tent caterpillars, gypsy moths, cabbage loopers, tomato horn worms and more. 8-OunceThe Safer Brand caterpillar killer with´┐ŻB.t. utilizes Dipel (bacillus thuringiensis var. Kurstaki) which, once ingested by the wayward caterpillar or worm, kills them within a few days.

Bonide Bt Thuricide 8-Ounce Worm Killer

by Bonide

  • Caterpillar Killer
  • Bacillus Thuringiensis Concentrate
  • Weight 8 oz

BT Thuricide 8oz Concentrate Certified Organic Thuricide is a liquid formulation of bacteria, Bacillus Thuringiensis (Bt), which is specific to leaf eating caterpillars. Controls loopers, cabbage worms, tomato horn worms, leaf rollers, gypsy moths and many others. Insects stop feeding and die within 2-3 days of ingestion. May be applied up to day of harvest. Will not harm beneficial insects


Safer Brand 5162 Caterpillar Killer with B.T. Garden Dust 8 Ounces

by Safer

  • 8 oz dust, ready-to-use powder and granular
  • Organic pest control - Contains bacillus thuringiensis (.4365%)
  • OMRI-listed and compliant for use in organic gardening
This OMRI-listed and compliant for use in organic gardening pest control product is very effective in killing caterpillars and worms, including corn earworm, bollworm, and more than a dozen other types of worms! This garden dust with BT. utilizes bacillus thuringiensis (var. kurstaki) which, once ingested by the pest, kills them within a few days. It is recommended that this product be applied late in the afternoon or on cloudy days since BT. breaks down in the sunlight.
Safer label. Ready to use puffer bottle kills a variety of caterpillers and worms using Dipel. Kills over 20 leaf eating insects. Biological insecticide for vegetables, fruits, ornamentals, flowers, and lawns. OMRI listed. Active ingredient: Bacillus thur
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