Which one is green manure/biofertilizer
Sesbania
Maize
Rice
Oat
Bordeaux mixture is named after
Nitrogen content of urea is
Pheromones are chemicals that are used in animals for
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?
First bioinsecticide developed on commercial scale was