Triazines are derived from
Ammonia
Urea
Uric acid
None
Pheromones are chemicals that are used in animals for
The pesticide used in foundations of buildings for preventing termite attack is
Which of the following when dissolved in water make(s) Bordeaux mixture
Which of the following are natural insecticides?
$(a)$ Rotenone $(b)$ Pyrethrum
$(c)$ Nicotine $(d)$ Azadirachtin