Air layering is performed in case of:

Triticale is the first man-made cereal crop. Mention the type of hybridisation through which it was produced.

In which type of hybridization is the progeny produced?

Where is the International Rice Research Institute $(IRRI)$ located?

Which tropical variety of sugarcane is grown in South India,characterized by a thick stem and high sugar content,but does not grow well in North India?

Consider the following four measures $(1-4)$ that could be taken to successfully grow chickpea in an area where bacterial blight disease is common.
$(1)$ Spray with Bordeaux mixture
$(2)$ Control of the insect vector of the disease pathogen
$(3)$ Use of only disease-free seeds
$(4)$ Use of varieties resistant to the disease
Which two of the above measures can control the disease?