Match List-I with List-II:Choose the correct answer from the... | Agrigyan

• Nathan Augustus Cobb (1859–1932):
• The Father of Nematology: Dr. N. A. Cobb was an eminent American biologist renowned worldwide as the foundational pioneer and 'Father of Nematology'.
• Birthplace: Cobb was born in Spencer, Massachusetts, USA on June 30, 1859. He later served as the Chief of the Division of Nematology at the United States Department of Agriculture (USDA) in Beltsville, Maryland, describing over 1,000 nematode species and inventing foundational nematological equipment (e.g., Cobb's sieving and gravity method).
• Conclusion: N. A. Cobb was born in the USA (Option 3).

Correct option: (3) USA

• Common and Scientific Names of Agricultural Nematodes:
• Pair-by-Pair Matching:
• Foliar nematode $\rightarrow$ (III) Aphelenchoides ritzemabosi: The chrysanthemum foliar nematode causing characteristic angular interveinal leaf lesions.
• Burrowing nematode $\rightarrow$ (IV) Radopholus similis: Landmark migratory endoparasite causing banana toppling disease and black head.
• Rice root nematode $\rightarrow$ (I) Hirschmanniella oryzae: Major migratory endoparasitic pest of lowland and irrigated flooded rice.
• Sheath nematode $\rightarrow$ (II) Hemicycliophora: Ectoparasitic nematode possessing a loose, double cuticular sheath over the entire body.
• Correct Choice: Option 4 maps (A)-(III), (B)-(IV), (C)-(I), (D)-(II).

Correct option: (4) (A) - (III), (B) - (V), (C) - (1), (BD) - (I)

• Soil Preferences of Cereal Cyst Nematode (Heterodera avenae):
• Statement (I) is correct: Heterodera avenae (causal agent of 'Molya disease' of wheat and barley) shows a pronounced ecological adaptation for light-textured, sandy, and well-drained soils (such as in Rajasthan, Haryana, and Punjab), where adequate pore space and aeration facilitate active juvenile migration and root penetration.
• Statement (II) is incorrect: In heavy-textured clay soils or poorly drained waterlogged soils, low aeration and narrow soil micropores severely impede $J_2$ movement and egg hatching.
• Conclusion: Statement (I) is correct but Statement (II) is incorrect (Option 3).