a naturally occurring bacterium present in soil, that produces a protein toxic to certain types of insects
A natural enemy of insects which was isolated from dead silk worms. This bacterium kills insects with the help of a protein, the so-called Bt-toxin. More than 50 Bt-toxins have been detected, each with its own characteristics.
A microorganism that produces a protein that acts as a biopesticide.
a biological control that specifically target caterpillars and other problem insects. Green Caterpillar Brent, Paul Buy this Art Print at AllPosters.com
(BT) - There are at least 35 species of BT, each identified and used to infect a specific insect groups. BT species are bacterial, infecting insects via ingestion (they are stomach poisons). BT does not spread from insect to insect, and is readily broken down by the sun. Because BT is targeted to specific species, beneficial insects should not be affected. It is likewise not considered dangerous to humans or pets.
Biological insecticide that kills caterpillars but is harmless to the environment and higher warm blooded animals.
(Bt) â€“ A bacterium that when ingested, is toxic to insects, in particular, caterpillars.
A bacterium which will destroy the stomach cells of insects that consume it. It degrades quickly in sunlight so spray early in the evening. This biological insecticides will also kill young butterfly caterpillars.
a bacteria which produces a toxin which is poisonous to soft bodied invertebrates. The bacteria interferes with digestion and the insect larva dies.
A naturally-occurring soil bacterium that occurs worldwide and produces a toxin specific to certain insects (e.g. moths, beetles, blackflies or mosquitoes).
A naturally occurring soil bacterium that makes an endotoxin that is toxic to larvae of the European corn borer (Lepidoptera). The gene for this endotoxin has been incorporated into corn to produce a genetically modified corn plant that can defend itself against the European corn borer. The endotoxin is very specific in that it only affects the corn borer larvae. It is not toxic to people, domestic animals, fish or wildlife.
(B.t.)[Français] A naturally occurring soil bacterium used because of its ability to produce a protein toxic to destructive pests. Genetically modified plants with the ability to produce B.t. have a built-in, pest resistant system.
Bacillus thuringiensis are rod-shaped soil bacteria that produce "cry" proteins. These proteins are toxic to some insects because they bind to their stomachs and cannot be digested. The proteins have no effect on mammals.
A bacterium that causes disease in a variety of pest larvae, but is safe to humans, birds and pets, and plants; marketed under such tradenames as Biotrolñ, Dipelñ, and Thuricideñ.
(Bt) A bacterium that kills insects; a major component of the microbial pesticide industry.
A species of bacteria that attacks soft bodied caterpillars and paralyzes their digestive system, leading to death.
a soil bacterium that produces toxins against insects (mainly in the genera Lepidoptera, Diptera and Coleoptera). Bt preparations are used in organic farming as an insecticide, but such sprays show fundamental differences to GM Bt crops because they contain a higher number of different Bt toxin in an un-processed form and because they degrade fast due to UV light. Bt plants however continuously produce one (or maybe two) toxins which increases the selection pressure for the development of resistances. In addition, Bt plants produce a modified form of the toxins that can have impacts on wider groups of insects or other organisms.
a naturally occurring bacteria that produces Bt toxin, a protein that is toxic to certain kinds of insects. The Bt toxin gene has been genetically engineered into corn and cotton plants to reduce the need for chemical pesticides.
var. kustaki: A biological insecticide developed in Canada. This natural bacterium, which occurs in soils, is sprayed on forests to combat damaging insects. Bacillus thuringiensis
a bacterium naturally living in soil that generates an endotoxin lethal to insects (including genera Dipetera, Coleoptera, and Lepidoptera among others). The endotoxin released is deadly due to the increased pH and activation of peptides that create pores in the insect's gut initiated by the toxin. This combination causes the destruction of cells inside the target, leading to the insect's death. Currently, researchers are attempting to integrate the baterium's insect toxins into plant DNA in order to create crops resistant to different insect species. [Source: Biotechnology Industry Organization, www.bio.org
(Abbreviation: Bt) A bacterium that produces a toxin against certain insects, particularly Coloeoptera and Lepidoptera; a major means of insecticide for organic farming. Some of the toxin genes are important for transgenic approaches to crop protection.
Bacterium that produces a protein called Bt toxin, a biological insecticide. Bt toxin is used to control insect pests by dusting the crop with Bt bacteria. When ingested, Bt toxin kills certain insect larvae, but is regarded as harmless to humans, pets and most beneficial insects such as bees. Inserting a copy of the Bt gene into plants enables them to produce Bt toxin protein. Such plants can resist some insect pests. See biological control, microbial insecticide.
Bacillus thuringiensis is a Gram-positive, soil dwelling bacterium of the genus Bacillus. Additionally, B. thuringiensis also occurs naturally in the caterpillars of some moths and butterflies, as well as on the surface of plants.