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02
Aug

Brown leaf spot (Drechslera oryzae)

 

1. It produces oval, eye-shaped spots with a conspicuous dark-brown spot in the centre and light brown margin.

2. The support is surrounded by yellow halo. Spots are also produced in the grains. This disease occurs in poor soils, therefore, give adequate and nutrition to the crop.

3. To control the disease, give two sprays of Tilt 25 EC (propiconazole) @ 200ml or

02
Aug

Blast (Pyricularia grisea)

 

1. The fungus causes spindle shaped spots with grayish centre and brown margin on the leaves at maximum tillering.

2. It also causes brown lesions on the neck of the panicle showing neck rot symptoms and the panicles fall over.

3. The disease is more severe on Basmati particularly in the submontaneous areas and under application of heavy nitrogenous fertilizers.

31
Jul

Bacterial leaf streak (Xanthomonas oryzae pv. oryzicola)

1. Small translucent streaks appear in the interveinal areas of the leaf. 2. The streaks gradually enlarge and turn reddish, when the plants near maturity.
31
Jul

Bacterial leaf blight (Xanthomonas oryzae pv. oryzae)

Greenish-yellow strips appear along the leaf margins and extend both lengthwise and breadthwise. The leaf starts drying from the tip, becomes white in severe cases and dries up completely. The disease sometimes attacks the freshly transplanted seedlings which start wilting and in a few days the whole clump dries up. The bacterium perpetuates through seed, rice straw, and roots of non-host plants during the off-season. In order to mitigate the losses, adopt the following measures : (i) For the m
31
Jul

Diseases of Punjab

1. Bacterial leaf blight 2. Bacterial leaf streak 3. Blast 4. Brown leaf spot 5. Sheath blight 6. Sheath rot 7. Stem rot 8. False smut 9. Bunt (also called Kernel Smut
31
Jul

Nadi (Paspalum distichum)

 

1. Moisture loving persistent perennial, extensively creeping by leafy stem rooting at the joints, runner flattened, hairy at the joints, often reddish purple.

2. Leaves thin, pale yellowish-green, abruptly tapering to sharp point, rough on the edges.

31
Jul

Kanki (Ischaemum rugosum)

 

1. Distinct transverse ridges on lower half of basal glume which are highly diagnostic for Ischaemum rugosum.

2. Other distinguishing characters: upper glume equal to or slightly longer than lower glume, spikelets less than 6 mm long.

31
Jul

Swanki (Echinochloa colonum)

 

1. Jungle rice, is 2 to 3 feet (60 - 90 cm) tall. Cotyledons (seed leaves) are greyish or dull green.

2. It is closely related to barnyard grass and looks similar except for the distinctive purple bands on leaves.

3. These bands may even be present on seedlings. There are no auricles or ligules in the collar region. Sharp-pointed, awnless spikelets are crowded alter

31
Jul

Swank or Barnyard grass

 

Swank or Barnyard grass ( Echinochloa crusgalli)

1. This plant can grow to ~ 125 cm in height and has long, flat leaves which are often purplish at the base.

2. Most stems are upright, but some will spread out over the ground. Stems are flattened at the base.

3. The seed heads are having a distinctive feature, often purplish, with large millet-like seeds in

Weed flora associated with different Rice based eco systems in the Punjab are 1. Swank or Barnyard grass ( Echinochloa crusgalli). 2. Swanki ( Echinochloa colonum). 3. Kanki (Ischaemum rugosum). 4. Nadi ( Paspalum distichum). 5. Motha or Chhatriwala dila (Cyperus iria). 6. Motha or Jhone da dila (Cyperus difformis). 7. Mothi or Hoora grass or Ghueen ( Fimbristylis miliacea). 8. Ghueen (Eleocharis spp.). 9. Dokani or Bringraj ( Eclipta alba). 10. Sanni (
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