Question:
Which biological agent can control Parthenium hysterophorus weed?
Which biological agent can control Parthenium hysterophorus weed?
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Remember key biocontrol pairings:
Zygogramma bicolorata $\rightarrow$ Parthenium
Neochetina spp. $\rightarrow$ Water Hyacinth
Dactylopius tomentosus $\rightarrow$ Prickly Pear Cactus
Zygogramma bicolorata $\rightarrow$ Parthenium
Neochetina spp. $\rightarrow$ Water Hyacinth
Dactylopius tomentosus $\rightarrow$ Prickly Pear Cactus
Updated On: Aug 7, 2026
- Teleonima scruplosa
- Neochetina bruchi
- Dactylopius tomentosus
- Zygogramma bicolorata
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Verified By Collegedunia
The Correct Option is D
Solution and Explanation
Step 1: Understanding the Concept:
Biological weed control involves using host-specific natural enemies, such as insects or plant pathogens, to manage weed populations.
Step 2: Detailed Explanation:
Parthenium hysterophorus (commonly known as congress grass or carrot weed) is an invasive weed that causes agricultural losses and health concerns like dermatitis and asthma.
To manage this weed, the leaf-feeding beetle Zygogramma bicolorata (the Mexican beetle) was introduced to India from Mexico in 19
Both the adults and larvae of this beetle feed specifically on the leaves of Parthenium.
Their feeding activity defoliates the weed, reducing its photosynthetic capacity and seed production, which helps suppress its growth.
The other biological agents listed target different weeds:
1. Teleonima scruplosa is used to control Lantana camara.
2. Neochetina bruchi is used to control water hyacinth (Eichhornia crassipes).
3. Dactylopius tomentosus is used to control prickly pear cactus (Opuntia species).
Step 3: Final Answer:
The biological control agent for Parthenium hysterophorus is Zygogramma bicolorata, which corresponds to Option (D).
Biological weed control involves using host-specific natural enemies, such as insects or plant pathogens, to manage weed populations.
Step 2: Detailed Explanation:
Parthenium hysterophorus (commonly known as congress grass or carrot weed) is an invasive weed that causes agricultural losses and health concerns like dermatitis and asthma.
To manage this weed, the leaf-feeding beetle Zygogramma bicolorata (the Mexican beetle) was introduced to India from Mexico in 19
Both the adults and larvae of this beetle feed specifically on the leaves of Parthenium.
Their feeding activity defoliates the weed, reducing its photosynthetic capacity and seed production, which helps suppress its growth.
The other biological agents listed target different weeds:
1. Teleonima scruplosa is used to control Lantana camara.
2. Neochetina bruchi is used to control water hyacinth (Eichhornia crassipes).
3. Dactylopius tomentosus is used to control prickly pear cactus (Opuntia species).
Step 3: Final Answer:
The biological control agent for Parthenium hysterophorus is Zygogramma bicolorata, which corresponds to Option (D).
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