Question:
Which nematode is known for causing 'root-knot' disease in plants?
Which nematode is known for causing 'root-knot' disease in plants?
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Root-knot nematode = Meloidogyne incognita.
Updated On: Jul 2, 2026
- Heterodera avenae
- Meloidogyne incognita
- Pratylenchus penetrans
- Ditylenchus dipsaci
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The Correct Option is B
Approach Solution - 1
Meloidogyne incognita, commonly known as the root-knot nematode, is a plant-parasitic nematode that induces the formation of characteristic galls or "knots" on the roots of infected plants. These galls interfere with the plant's ability to absorb water and nutrients, leading to stunted growth and yield losses. Management includes crop rotation, resistant varieties, and nematicides.
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Approach Solution -2
Name-to-Symptom Match: 'Root-knot' describes the visible symptom (galls/knots on roots) — match it to the nematode genus famous for causing exactly that.
Meloidogyne incognita is THE classic root-knot nematode, inducing gall formation that blocks water/nutrient uptake.
Heterodera avenae causes cyst disease, Pratylenchus penetrans causes lesion (not knot) symptoms, and Ditylenchus dipsaci causes stem/bulb rot — each has its own distinct, differently-named symptom.
Meloidogyne incognita is THE classic root-knot nematode, inducing gall formation that blocks water/nutrient uptake.
Heterodera avenae causes cyst disease, Pratylenchus penetrans causes lesion (not knot) symptoms, and Ditylenchus dipsaci causes stem/bulb rot — each has its own distinct, differently-named symptom.
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