A Japanese biologist, Shigetane Ishiwatari first time observed the bacterium Bacillus thuringiensis (Bt.) as the cause of the sudden-collapse disease.
Ernst Berliner first isolated a bacteria that had the capability to kill a Mediterranean flour moth and he re-discovered Bt. Since this moth was found in a German town Thuringia, therefore it was named Bacillus thuringiensis by him.
Berliner told the existence of a crystal within Bt.
H. Fitz-James, and Angus saw that the main insecticidal activity against lepidopteran (moth) insects was due to the parasporal crystal. This discovery came to increase the interest of biologists in the structure of the crystal, general mode of action of Bt. and biochemistry of it.
In the US, Bt was used commercially.
Bt. was registered as a pesticide to the EPA.
Use of Bt. increased when insects became more resistant to the synthetic insecticides. Scientists and people became more aware of the environment. Since the environment was harming by using chemical, and Bt. is organic and it affects specific insects and does not persist in the environment, therefore governments and private industries started to fund research on Bt.
With the advancement in molecular biology, it soon became feasible to move the gene that encodes the toxic crystals into a plant. The first genetically engineered plant, corn, was registered with the EPA.
Bt. cotton was introduced into US agriculture.
Bt. cotton was introduced in Indian cotton farming.
Basic characteristics and properties of Textile fibres
Cotton spinning process chart
Various types of cotton and cotton varieties