Question:

Weed not found in rice crop is

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Remember that Chenopodium album is a classic C3 winter weed, whereas rice weeds are mostly C4 grasses or sedges adapted to tropical summer/monsoon seasons.
  • Echinochloa spp.
  • Cyperus iria
  • Chenopodium album
  • Eleusine indica
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The Correct Option is C

Solution and Explanation



Step 1: Understanding the Concept:

Weed species distribution is highly dependent on crop seasons (Kharif/winter), soil moisture levels, and the cultivation environment (wetland/upland).

Step 2: Detailed Explanation:

- {Echinochloa species (barnyard grass) are the most dominant grassy weeds in flooded rice fields.
- {Cyperus iria (rice flatsedge) is a prominent sedge adapted to wet, waterlogged rice environments.
- {Eleusine indica (goosegrass) is a common weed in upland and direct-seeded rice ecosystems.
- {Chenopodium album (lamb's quarters or Bathua) is a dominant winter-season (Rabi) dicot weed.
It requires drier, cooler soil conditions and is typically found in wheat, mustard, and potato crops, but not in flooded rice fields.

Step 3: Final Answer:

The weed not found in rice crops is Chenopodium album.
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