Advertisements
Advertisements
Question
What is meant by the term bio-pesticide? Name and explain the mode of action of a popular bio-pesticide.
Solution
Biopesticide is a pesticide which is
- Not chemical in nature
- More specific in action against the pest
- Safer for the environment than chemical pesticides A popularly known bio-pesticide is Bt toxin, which is produced by a bacterium called Bacillus thuringiensis. Bt toxin gene has been cloned from this bacterium and expressed in plants. Bt toxin protein when ingested by the insect, gets converted to its active form due to the alkaline pH of the gut. The activated toxin binds to the surface of midgut epithelial cells and creates pores that cause cell swelling and lysis and eventually kill the insect.
APPEARS IN
RELATED QUESTIONS
Which part of the plant is best suited for making virus-free plants and why?
Find out what the various components of the medium used for propagation of an explants in vitro are?
List any five possible advantages of a GMO to a farmer.
Organic farmers prefer biological control of diseases and pests to the use of chemicals for the same purpose. Justify.
What are biofertilizers? Describe their role in agriculture. Why are they preferred to chemical fertilizers?
Answer the following question.
List one advantage and one disadvantage of an apomictic crop.
Answer the following question.
List any four ways by which GMOs have been useful for enhanced crop output.
The trigger for activation of toxin of bacillus thuringlensis is ______.
Silencing of a gene could be achieved through tee use ______.
Bt cotton is resistant to pest, such as lepidopteron, dipterans and coleopterans. Is Bt cotton also resistant to other pests as well?
