Question

Weed not found in rice crop is:

• A. Echinochloa spp.
• B. Cyperus iria
• C. Chenopodium album
• D. Eleusine indica

Hint:

Know the common weed flora of specific crops like rice, wheat, or maize to quickly eliminate incorrect options.

Answer 1

The Correct Option is C

Chenopodium album is typically a weed found in dryland crops and not associated with the wetland conditions of rice fields.

Answer 2

Classification by habitat and water requirement:
Echinochloa spp. (barnyard grass), Cyperus iria (a sedge) and Eleusine indica are all well documented as common weeds of lowland, standing-water rice fields, thriving under the same flooded or moist conditions as the crop. Chenopodium album (fat hen), in contrast, is a classic weed of dry, upland field crops such as wheat, mustard and vegetables, and it does not tolerate prolonged waterlogging, so it is not typically found growing in submerged rice fields. Eliminating the three wetland-adapted weeds leaves Chenopodium album as the odd one out, confirming option 3.