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Weeds

Weeds
28
Jul

Cyperus iria. L

Marathi Name: Veni lavala.

Family: Cyperaceae.

Description:

• Widely distributed species in paddy fields .

• Stems 15 to 50 cm high, trigonous.

• Leaves up to 42.5 cm long; bracts 3-5 to 25 cm long; spike consists of 5-15 spikelets; nuts trigonous, oboviod, black.

File Courtesy: 
RARS, Karjat
28
Jul

Cyperus difformis L.

 

Marathi Name: Chhatri lavala.

Family: Cyperaceae.

Description:

• Slender weak plant.

• Stem tufted, 12.5 to37.5 cm long.

• Leaves flaccid, as long as the stem; bracts 2-3, 5 to 20 cm long

File Courtesy: 
RARS, Karjat
Photo Courtesy: 
Dr. B.Sreedevi (DRR)
28
Jul

Marselia quadrifolia L. ( Marsilea)

 

Family: Marsileaceae (Pteridophyta)
Description:
• Amphibious herb with procumbent rhizomes and variable leaves
• Petiole adjusting its length to the depth of water; occurs in paddy field and floats on running water.
• Propagation- rhizomes

File Courtesy: 
RARS, Karjat
Photo Courtesy: 
Dr. B.Sreedevi (DRR)
28
Jul

Ludwigia parviflora L. Roxb

Marathi name: Kadu chinch.

Family: Onagraceae.

Description:

• Annual herb.

• Height - up to 60 cm.

• Leaves linear or lanceolate; simple, alternate.

• Propagation - seeds.

File Courtesy: 
RARS, Karjat
28
Jul

Monochoria vaginalis ( Monochoria)

 

Marathi Name: Family: Pontederiaceae

Description:

• Root stock short and sub erect.

• Leaves linear or narrowly ovate with cordate base 5 to 15 cm long .

• Propagation - seed and root stock.

Thrives well in moist places

File Courtesy: 
RARS, Karjat
Photo Courtesy: 
Dr. B.Sreedevi (DRR)
28
Jul

Echinocloa crus galli ssp. Hispidula (Barn yard grass)

Marathi Name: Kusali pakhad

Family: Poaceae

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.

• Widely distributed throughout the warm tropics.

• Propagation - seeds.

File Courtesy: 
RARS, Karjat
28
Jul

Recommended Weed Management in Rice for Maharashtra state

Weed Management in Rice:

1. Weeds should be removed manually twice (20 and 40 days after transplanting) or use effective herbicide (butachlor 50 EC @ 1.5 kg a.i./ha).

2. Recommended dose of the herbicide should be mixed in fine sand (50 kg/ha) and broadcasted uniformly in field within a week of transplanting.

3. Water level in the field should be 1 – 2 cm at the time of herbicide application and after 24 hours of herbicide application again increase the water level (4 – 5 cm) for effective weed control.

File Courtesy: 
RARS, Karjat
22
Jul

Monochoria vaginalis

 

Botanical name and family : Monochoria vaginalis, Pontederiaceae

Common name : Oval Leaf Pondweed, Oval Leaf Monochoria, Marshy betelvine

Kannada name : Thamara

Plant description : A herb

Habitat : Wet lands and marshy areas

File Courtesy: 
ZARS, Mandya
Photo Courtesy: 
ZARS, Mandya
22
Jul

Marsilea quadrifolia

 

Botanical name and family : Marsilea quadrifolia, Marsileaceae

Common name : Four Leaf Clover

Kannada name : Kadu sabbasege , Neeru sabbasege

Plant description : Aquatic fern

Habitat : Shallow water of lakes, ponds, or quiet sections of rivers and streams

File Courtesy: 
ZARS, Mandya
Photo Courtesy: 
ZARS, Mandya
22
Jul

Centella asiatica

 

Botanical name and family : Centella asiatica, Umbelliferae.

Common name : Indian Pennywort, Asiatic coinwort.

Kannada name : Uondelaga.

Plant description : A prostrate herb.

Habitat : Rice fields along by bits of bunds of irrigation channels.

File Courtesy: 
ZARS, Mandya
Photo Courtesy: 
ZARS, Mandya
22
Jul

Cyperus rotundus

 

Botanical name and family : Cyperus rotundus , Cyperceae
Common name : Purple nut sedge
Kannada name : Dabbe Jandu uollu
Plant description : A Perennial grass
Habitat : In rice fields
Method of propagation : Tubers

File Courtesy: 
ZARS, Mandya
Photo Courtesy: 
ZARS, Mandya
22
Jul

Cyperus iria

 

Botanical name and family : Cyperus iria, Cyperaceae  .

Common name : Rice flatsedge.

 Kannada name : Dabbe Jandu uollu.

 Plant description : A erect glabrous annual.

 Habitat : Rice fields marshy places and in ponds and ditches during monsoon.

File Courtesy: 
ZARS, Mandya
Photo Courtesy: 
ZARS, Mandya
22
Jul

Cyperus difformis

 

Botanical name and family : Cyperus difformis, Cyperaceae

Common name : Smallflower

Kannada name : Kare sanna jandu uollu

Plant description : A erect, tufted glabrous annual

Habitat : In rice fields

Method of propagation : By seeds

File Courtesy: 
ZARS, Mandya
Photo Courtesy: 
ZARS, Mandya
22
Jul

Major weeds present in rice crop of Karnataka state

Major weeds present in rice crop of Karnataka state are

1. Cyperus difformis.

2. Cyperus iria.

3. Cyperus rotundus.

4. Marsilea quadrifolia.

5. Monochoria vaginalis.

File Courtesy: 
ZARS, Mandya
12
Jul

Perennial sedges - Cyperus rotundus L. (Purple nut sedge)

 

File Courtesy: 
BAU Ranchi
Photo Courtesy: 
Dr.Sreedevi (DRR)
12
Jul

Annual sedges - Cyperus iria L.

 

 

Family: Cyperaceae Description: - Widely distributed species in paddy fields Stems 15 to 50 cm high, trigonous

File Courtesy: 
BAU Ranchi
Photo Courtesy: 
Dr.Sreedevi (DRR)
12
Jul

Annual grass weed - Echinocloa crusgalli ssp.

Family: Poaceae 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.
- Widely distributed throughout the warm tropics.
- Propagation
- seeds.

File Courtesy: 
BAU Ranchi
Photo Courtesy: 
Dr.Sreedevi (DRR)
12
Jul

Annual broad leaf weeds (dicotyledons) - Monochoria vaginalis ( Monochoria)

Family: Pontederiaceae Description:
- Root stock short and sub erect
- Leaves linear or narrowly ovate with cordate base 5 to 15 cm long
- Propagation
- seed and root stock.
- Thrives well in moist places

File Courtesy: 
BAU Ranchi
Photo Courtesy: 
Dr.Sreedevi (DRR)
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