The Question is from neet-botany , and it was created by the author B VENKAT

Question

Meloidegyne incognitia infects the root of?

B VENKAT · Accepted Answer

## CORE INFORMATION
✓ **Answer**: A
## CONCEPT FRAMEWORK
	**Primary Concept**: Plant Pathology/Nematology
	**Related Topics**: Plant Diseases, Parasitology, Agriculture
	**Prerequisites**: Basic understanding of plant-parasite interactions.
## SOLUTION PATHWAY
**Given Information**:
	The question asks about the host plant of the nematode *Meloidegyne incognitia*.
**Method & Steps**:
	1. **Identify the nematode**: *Meloidegyne incognitia* is a root-knot nematode.
		Reasoning: Root-knot nematodes are plant-parasitic nematodes that cause galls or knots on the roots of susceptible plants.
	2. **Recall host plants**: *Meloidegyne incognitia* is known to infect a wide range of plants, but it is a particularly significant pest of tobacco.
		Key Point: While it can infect other plants, tobacco is one of its most important hosts economically.
	3. **Match with options**: The option 'Tobacco plants' corresponds to the known host range of *Meloidegyne incognitia*.
		Result: 'Tobacco plants' is the correct answer.
		Verification: This is a well-established fact in plant pathology literature and agricultural practice.
## OPTION ANALYSIS
[A] ✓: 'Tobacco plants' are a major host for *Meloidegyne incognitia*. This nematode causes significant damage to tobacco crops by affecting root development and overall plant health.
[B] :x: 'Potato plants' can be infected by other root-knot nematodes like *M. javanica* and *M. hapla*, but *M. incognitia* is not a primary pest of potatoes.
[C] :x: 'Rice plants' are generally not affected by *Meloidegyne incognitia*. Other nematodes, like *Hirschmanniella* species, are more common pests of rice.
[D] :x: 'Wheat plants' are also not a primary host for *Meloidegyne incognitia*.  *M. naasi* can infect wheat, but *M. incognitia* is more associated with dicotyledonous plants like tobacco.
## LEARNING AIDS
	**Common Mistakes**:
		1. **Confusing nematode species**: Many *Meloidegyne* species have different host preferences. It's important to know the specific host range of *M. incognitia*.
		2. **Overgeneralizing host range**: While *M. incognitia* has a broad host range, it has preferred hosts where it causes the most significant damage.  Tobacco is a key example.
	**Quick Tips**:
		1. **Remember the association**:  Associate *M. incognitia* with tobacco as its most economically important host.
		2. **Focus on the 'incognitia'**:  The name 'incognitia' can be a mnemonic to remember its association with a 'cognitia'ble crop like tobacco.

B VENKAT · Answer

The correct Option is "Tobacco plants"

B VENKAT · Answer

Potato plants

B VENKAT · Answer

Rice plants

B VENKAT · Answer

Wheat plants

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