Vespula pennsylvanica / maculiforna / germanica / vulgaris / squamosa and DolichovespulaThe dog days of summer…fresh water melon, ice cream, p
How to use Bacillus thuringiensis (Bt) to Control Insect Pests
06.06.2023 - 18:27 / gardenerspath.com / Helga George
How to use Bacillus thuringiensis (Bt) to Control Insect Pests What is BT?Bt is the abbreviation for bacteria that were named Bacillus thuringiensis in 1911 after the discovery that they could kill Mediterranean flour moths in the German city of Thuringia.
These common soil bacteria have been used as microbial insecticides for the last century.
Farmers in Europe were the first to recognize their potential in 1920, and US farmers started using them in 1958. The Environmental Protection Agency (EPA) registered them as a pesticide in 1961.
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They can be used on foliage, food storage facilities, soil, or water environments.
Why are these bacteria so widely used? They occur naturally, affect very specific insects, and are relatively inexpensive and safe for humans, birds, fish, and most beneficial insects.
However, for them to work effectively, you need to know what type of insect you want to target and make sure that you purchase a strain that will kill that particular species.
The National Pesticide Information Center reports that there are more than 180 pesticide products registered that contain Bt! And many have been approved for use in organic agriculture.
We at Gardener’s Path will cover the strains of Bt that are widely used. With thousands of strains out there, we can’t go over all of them!
We will list the strains that you are likely to encounter and describe how to use them.
What Kinds of Insects Does Bt Kill?Each strain of Bt will kill different kinds of insects. Some strains are very specific for a few species, while others will kill across a large class of insects.
The most commonly used types are shown below:
Bt
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