Question

Weed commonly found in rice is. Plz ans this question Thanks

Answer 1

Hi buddy ,❣️

Here is your answer,❣️▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬

Weeds are the unwanted plants which competes for nutrients,minerals,water,sunlight etc with crop...This leads to shortage of Yield..

We can control weeds by spraying on the weeds regularly at regular intervals of time..

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Hope it helps uh!!

Mark as brainliest!!

Thanku!!❣️

Answer 2

Answer:

Weed Management in rice

I. Effect of weeds on rice

II. Types of weeds found in rice

III. Critical period of crop weed competition

IV. Methods of weed control

I. Effect of weeds on rice

1. Reduce the yield and quality of rice by competing for nutrients, water and sunlight

Upland direct seeded rice : 35-45% reduction in yield

Direct seeded on puddle land : 20-25% reduction in yield

Transplanted rice : 10-15% reduction in yield

2. Weeds intensify the pest and disease problem by serving as alternate host

3. Reduce the efficiency of harvesting

4. Reduce the land value

5. Problems of water contamination

II. Types of weeds

A. Low land rice

1. Annual grasses

Echinocloa crusgalli ssp. Hispidula (Barn yard grass)

Kannada Name: Kadu dabbe hullu

Family: Poacea

Description:

Tufted annual grass.

Height - 30- 60 cm with thick, coarse, mostly erect smooth and branching at the base.

Sessile leaf blades attached to a smooth sheath which encircles the stem in the absence of ligule. The leaf blade is 10-30 cm long and 5-20 mm wide. Midrib is prominent.

Stem is stout. Culms branches at the base and produce tillers.

Inflorescence is 10-20 cm long with slender spike like. Panicle green or purplish in colour. Spikelets are densely crowded in 2-4 rows on each side of the stem. Seeds are light orange yellow in colour.

Adventitious root system.

Widely distributed throughout the warm tropics.

Propagation - seeds.

Echinocloa colonum L. Link ( Jungle rice)

Kannada Name: Oodalu, kadu haraka hullu

Family: Poacea

Description:

Slender annual

Height - 60-90 cm. Stem is creeping below and erect above, with rooting at lower nodes. Leaf blade 7.5 to 15 cm long; often blotched with purple or almost black cross bands. Ligule is absent.

Explanation: