Question:
Reducing weed growth by manipulating water level in water bodies, light intensities, nutrient availability, competitive displacement. etc. is known as
Reducing weed growth by manipulating water level in water bodies, light intensities, nutrient availability, competitive displacement. etc. is known as
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Ecological weed management is a sustainable, low-input approach that reduces dependence on chemical herbicides by using natural resource competition to suppress weeds.
Updated On: Jul 23, 2026
- Preventive weed management
- Mechanical weed management
- Ecological weed management
- Cultural weed management
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The Correct Option is C
Solution and Explanation
Step 1: Understanding the Concept:
Weed management involves diverse physical, chemical, biological, and ecological strategies to suppress weed populations below economic damage thresholds.
Step 2: Detailed Explanation:
Let us analyze the distinct management terms:
1. Ecological Weed Management (often referred to as habitat or environmental management): This strategy suppresses weeds by manipulating environmental and resource factors like light intensity, water levels, nutrient availability, and crop canopy structure.
By adjusting these factors, it creates a competitive advantage for the crop over weeds, leading to competitive displacement.
For example, flooding rice fields to suppress terrestrial weeds is a classic ecological management practice.
2. Preventive Weed Management: This involves measures to prevent the introduction and spread of new weed seeds or vegetative parts into clean areas (e.g., using clean seed, managing fence rows, and cleaning machinery).
3. Mechanical Weed Management: This uses physical force to destroy weeds (e.g., hand weeding, hoeing, mowing, and tillage).
4. Cultural Weed Management: This involves standard agronomic practices that support crop growth (e.g., crop rotation, sowing time, and seed rate), but does not focus primarily on environmental resource manipulation.
Step 3: Final Answer:
Environmental and resource manipulation to manage weeds is known as Ecological weed management, corresponding to option (C).
Weed management involves diverse physical, chemical, biological, and ecological strategies to suppress weed populations below economic damage thresholds.
Step 2: Detailed Explanation:
Let us analyze the distinct management terms:
1. Ecological Weed Management (often referred to as habitat or environmental management): This strategy suppresses weeds by manipulating environmental and resource factors like light intensity, water levels, nutrient availability, and crop canopy structure.
By adjusting these factors, it creates a competitive advantage for the crop over weeds, leading to competitive displacement.
For example, flooding rice fields to suppress terrestrial weeds is a classic ecological management practice.
2. Preventive Weed Management: This involves measures to prevent the introduction and spread of new weed seeds or vegetative parts into clean areas (e.g., using clean seed, managing fence rows, and cleaning machinery).
3. Mechanical Weed Management: This uses physical force to destroy weeds (e.g., hand weeding, hoeing, mowing, and tillage).
4. Cultural Weed Management: This involves standard agronomic practices that support crop growth (e.g., crop rotation, sowing time, and seed rate), but does not focus primarily on environmental resource manipulation.
Step 3: Final Answer:
Environmental and resource manipulation to manage weeds is known as Ecological weed management, corresponding to option (C).
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