Question

Given below are two statements:

Statement (i): Stubby root nematode are also known as Longidorids 
Statement (ii): Stubby root nematode are also known as Trichodorids 

In light of the above statements, choose the most appropriate answer from the options given below.

• A. Both Statement (i) and Statement (ii) are correct
• B. Both Statement (i) and Statement (ii) are incorrect
• C. Statement (i) is correct but Statement (ii) is incorrect
• D. Statement (i) is incorrect but Statement (ii) is correct

Hint:

Longidorids = stubby root nematodes; Trichodorids = different root nematodes with needle-like stylets.

Answer 1

The Correct Option is C

Stubby root nematodes actually belong to the family Longidoridae, also called longidorids.
They have a stubby appearance and are ectoparasites of plant roots, often vectors of plant viruses.
Trichodorids are a different group of plant
parasitic nematodes, typically smaller and belonging to family Trichodoridae.

Answer 2

Alternate approach - work from the family name itself:
The common name "stubby root nematode" is derived directly from the family Longidoridae being informally referred to as "longidorids" in nematology literature, describing the short, stubbed appearance of infected roots caused by their feeding.
Trichodorids instead belong to the separate family Trichodoridae; while also plant-parasitic and able to stunt roots, the specific common name "stubby root nematode" is conventionally reserved for the longidorid group in this context.
Since Statement (i) correctly links the common name to Longidorids and Statement (ii) incorrectly substitutes Trichodorids, only the first statement holds true.