Which one is green manure/biofertilizer

  • A

    Sesbania

  • B

    Maize

  • C

    Rice

  • D

    Oat

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Consider the following four measures $(I-I V)$ 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.

$I V$. Use of varieties resistant to the disease.

Which of the above measures can control the diseases?

  • [AIIMS 2018]

First bioinsecticide developed on commercial scale was