Question:
Which of the following is used as insecticide, fungicide, nematicide and weedicide too?
Which of the following is used as insecticide, fungicide, nematicide and weedicide too?
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Dazomet is referred to as a "soil sterilant" because its gaseous breakdown product (MITC) is completely biocidal, killing insects, weeds, fungi, and nematodes in the soil profile prior to crop planting.
Updated On: Aug 18, 2026
- Diazinon
- Dodine
- Diuron
- Dazomet
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Verified By Collegedunia
The Correct Option is D
Solution and Explanation
Step 1: Understanding the Concept:
Certain broad-spectrum soil sterilants/fumigants undergo rapid chemical degradation in moist soils to release volatile compounds that eradicate all biological organisms.
Step 2: Detailed Explanation:
Dazomet is a dry, granular pre-plant soil fumigant and sterilant.
Upon contact with moist soil, it degrades rapidly to release methyl isothiocyanate (MITC) gas, along with formaldehyde and hydrogen sulfide.
This gas is highly toxic to:
- Soil-dwelling insect pests (insecticide).
- Plant-pathogenic fungi (fungicide).
- Plant-parasitic nematodes (nematicide).
- Germinating weed seeds and grasses (weedicide/herbicide).
Step 3: Final Answer:
The pesticide used across all these categories is Dazomet, which is option (D).
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