Crop Production And Management

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.

• The variety of Okra Pusa Sawani is resistant to the Shoot & Fruit borer, which is a common pest affecting okra crops.
• This resistance helps in reducing the damage caused by these pests, improving the overall yield and quality of the okra.

The correct answer is (D) : Shoot & Fruit.