Consider the following four measures $(I-IV)$ that could be taken to successfully grow chickpea in an area where bacterial blight is common.
$I.$ Spray with Bordeaux mixture.
$II.$ Control of the insect vector of the disease pathogen.
$III.$ Use of disease-free seeds only.
$IV.$ Use of varieties resistant to the disease.
Which of the above measures can control the disease?

Which of the following are considered volatile toxicants used as fumigants?

Silk,honey and lac are:

New varieties of plants can be produced by:

The $IARI$,New Delhi has developed several vegetable crops. What are they enriched with?

Consider the following statements about organic farming:
$I.$ Organic farming promotes the use of crop rotations and cover crops and encourages balanced host/predator relationships.
$II.$ Integrated pest and weed management and soil conservation systems are valuable tools on an organic farm.
$III.$ Organic farming protects the environment,minimizes soil degradation and erosion,and decreases pollution.
Which of the statements given above are correct?