Which type of pesticide enters the tracheal system of an insect in vapor form?

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ASystemic poison

BFumigant

CStomach poison

DContact Poison

Answer:

Fumigant: The pesticide or toxicant enters into the tracheal system (respiratory poison) through spiracles in vapour form.
Eg: Aluminium phosphide
Systemic poison - Pesticides applied on the plant parts or on soil are absorbed by the foliage (or) roots and translocated through vascular system. Such pesticides cause death of insect feeding on plant.
Eg: Dimethoate

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