Question

Cry-IAC effectively controls,

• A. Ring worm
• B. Cotton bollworms
• C. Corn borer
• D. Root nematode

Answer 1

The Correct Option is B

Cry-IAC is a specific strain of the bacterium Bacillus thuringiensis (Bt) that produces a toxin called Cry toxin. This toxin is known for its insecticidal properties and is used in agriculture as a biological control agent for pest management.

Among the options given, Cry-IAC is most commonly used to effectively control (2) Cotton bollworms (also known as Helicoverpa armigera or Helicoverpa zea). Cotton bollworms are a significant agricultural pest that infests cotton crops and causes extensive damage to the bolls.

While Cry toxins have been developed to target specific insect pests, they are not typically used for controlling ringworm (a fungal infection), corn borers (moths that infest corn plants), or root nematodes (microscopic roundworms that affect plant roots). Different control methods and treatments are employed for these particular issues.

Answer 2

Cry-IAC is a type of Cry gene derived from Bacillus thuringiensis (Bt) that produces insecticidal proteins. Cry-IAC effectively controls lepidopteran pests, specifically cotton bollworms (Helicoverpa armigera), which are major pests in cotton crops.

These Cry proteins function by binding to the midgut epithelial cells of target insects, creating pores that disrupt ion balance, leading to insect death.