Question

What is the mode of entry for a Fumigant pesticide?

• A. Ingestion
• B. Absorption through skin
• C. Through spiracles in vapor form
• D. Absorption by roots

Answer 1

Answer:

C. Through spiracles in vapor form

• 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