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Crop Protection with vernacular Names

Crop Protection with vernacular Names
2
Aug

Rice Caseworm

1. Case worm (Nymphula depunctalis) is one of the serious pests in many areas of the NE region.
2. Adults of case worm are 6 mm long with wingspan of 15 mm. Slender green coloured caterpillars cut leaf blades into length of about 1.25 cm out of which they make tubular cases with which they feed and float while moving plant to plant. During heavy damage, leaves are skeletonised and appear whitish in colour.

File Courtesy: 
ICAR NEH, Umiam
Photo Courtesy: 
CRRI
2
Aug

Rice Leaf roller

File Courtesy: 
ICAR NEH, Umiam
Photo Courtesy: 
CRRI
2
Aug

Rice Stem borer

File Courtesy: 
ICAR NEH, Umiam
Photo Courtesy: 
CRRI
2
Aug

Important Pests of Meghalaya and Manipur

The economically important insects causing considerable damage to rice crop in this region are
1. Stem borer
2. Leafroller
3. Caseworm
4. Armyworm
5. Thrips
6. GalI midge
7. Rice hispa
8. Rice ear cutting caterpillar
9. Rice green semilooper
10. Gundhibug
11. Root aphids
12. Horned caterpillar
13. Skipper
14. Slug caterpillar

File Courtesy: 
ICAR NEH, Umiam
2
Aug

Insect Pests of Punjab State

Important insect pests of punjab state are

1. Rice stemborer .

2. Leaf Folder.

3. Plant hoppers.

4. Grasshoppers.

5. Rice Hispa.

6. Rice root weevil.

7. Rice-ear-cutting-caterpillar

File Courtesy: 
Punjab Agricultural University, Ludhiana
2
Aug

Insect Pests of Punjab State

Important insect pests of punjab state are

1. Rice stemborer
2. Leaf Folder
3. Plant hoppers
4. Grasshoppers
5. Rice Hispa
6. Rice root weevil
7. Rice-ear-cutting-caterpillar

File Courtesy: 
Punjab Agricultural University, Ludhiana
2
Aug

Bunt or Kernel Smut (Neovossia horrida)

1. Only a few grains in the panicle are infected. Frequently, only a part of the grain is replaced by a black powder.

2. Sometimes, entire grain is also attacked and the black powder scatters on to other grains or leaves, and this is often the easiest way to detect the disease in the field.

3. The disease incidence is more on short duration varieties, planted early. Also avoid heavy doses of nitrogenous fertilizers.

4. Two sprays of Tilt 25 EC @ 200 ml in 200 litres of water/acre at 10% flowering stage and 10 days after should be given for controlling the disease.

File Courtesy: 
Punjab Agricultural University, Ludhiana
2
Aug

False smut (Ustilaginoidea virens)

 

File Courtesy: 
Punjab Agricultural University, Ludhiana
Photo Courtesy: 
Dr. D. Krishnaveni (DRR)
2
Aug

Stem rot (Sclerotium oryzae)

 

1. The fungus affects the stem at earing and black lesions are produced on the sheath at water level.

2. Later on, the stem gets infected and rots leading to withering and lodging of the plant.

3. The incidence of this disease has declined on high yielding varieties due to improved cultural practices. Prefer to grow tolerant varieties of the Basmati group in the infested fields.

File Courtesy: 
Punjab Agricultural University, Ludhiana
2
Aug

Sheath rot (Sarocladium oryzae)

 

1. The rot occurs on the uppermost leaf-sheaths where oblong to irregular and grey-brown to light-brown lesions develop.

2. The lessons often coalesce to cover the entire sheath. In severe cases, young panicles either do not emerge or emerge partially.

3. A white- powdery growth of the fungus appears on the panicle inside the sheath. The glumes of infected florets are discoloured, dark-red or purple brown to black and often do not fill.

File Courtesy: 
Punjab Agricultural University, Ludhiana
Photo Courtesy: 
Dr. D. Krishnaveni (DRR)
2
Aug

Sheath blight (Corticium sasakii)

 

1. Greyish green lesions with purple margin develop on the leaf-sheath above the water level. Later, the lesions enlarge and coalesce with other lesions.

2. The symptoms are usually not distinct till flowering. Its severe attack results in the poor filling of the grains.

3. Burn the rice straw and stubbles after harvesting the affected crop. Avoid the excessive use of nitrogenous fertilizers. Keep the bunds clean by removing the grass.

File Courtesy: 
Punjab Agricultural University, Ludhiana
Photo Courtesy: 
Dr. D. Krishnaveni (DRR)
2
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 Indofil Z-78 (zineb) @500g in 200 litres of water/acre.

File Courtesy: 
Punjab Agricultural University, Ludhiana
Photo Courtesy: 
Dr. D. Krishnaveni (DRR)
2
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.

File Courtesy: 
Punjab Agricultural University, Ludhiana
Photo Courtesy: 
Dr. D. Krishnaveni (DRR)
1
Aug

Flea beetles

Adults scrap and feed on the chlorophyll of new leaves. Young seedlings are more affected and start drying from tips. Typical damage can be seen as white blotches on leaves.

Management of Flea beetles

Spray monocrotophos 0.05% at the time of incidence.

File Courtesy: 
Rice Research Station, Kaul (Kaithal), Haryana
Photo Courtesy: 
Rice Research Station, Kaul (Kaithal), Haryana
1
Aug

Management of Gundhi bug

Dusting the crop with Carbaryl (Sevin 5%) or Malathion 5% dust or chlorpyriphos 2% dust @ 20 kg/ha in the morning hours with duster or spraying the crop with 0.05 % monocrotophos or 0.07% endosulfan or 0.05% quinalphos (Ekalux) to reduce the population.
(B) Lowland: Lowland rice is infested in nursery as well as after transplanting.
1.Nursery: Many insects infests rice in nursery, viz., root aphid, flea beetles, stem fly, stem borers, WBPH, green leaf hoppers, grass hoppers, filed crickets & hairy caterpillars and cause severe damage.

File Courtesy: 
Rice Research Station, Kaul (Kaithal), Haryana
1
Aug

Gundhi bug and Sucking bug

Nature of damage:
Nymphs and adults both suck the sap from the developing grain at milky stage by which grain become chaffy, empty and some grains develop but break during milling.

File Courtesy: 
Rice Research Station, Kaul (Kaithal), Haryana
Photo Courtesy: 
Rice Research Station, Kaul (Kaithal), Haryana
1
Aug

Management of Rice root aphid

1. Soil incorporation with Carbofuran 3 G @ 1.6 g/m2 (l/2 kg. a.i. /ha) followed by root -zone spray with monocrotophos (0.05 % concentration) at 60 days after sowing.

2. This will also reduce other pest like stem borer, stem fly, leaf roller, WBPH and green leaf hoppers.

File Courtesy: 
Rice Research Station, Kaul (Kaithal), Haryana
1
Aug

Rice root aphid

Nature of damage:
1. Nymphs and adults suck the sap from the tender roots. In heavy infestation seedlings' growth is stunted, become pale yellow in colour and do not flower.

2. The infestation starts in vegetative stage 25 -30 days after sowing and continues till ripening.

File Courtesy: 
Rice Research Station, Kaul (Kaithal), Haryana
Photo Courtesy: 
Rice Research Station, Kaul (Kaithal), Haryana
1
Aug

Leaf scald

Symptoms:

1. The disease is caused by Rhynchosporium oryzae;

2. Leaves get blighted with dark and light brown zonations.

3. The symptoms may start from tip or margin of the leaf.

Management of disease

1. One or two sprays of 0.1% carbendazim 50 WP at Panicle Initiation reduce the disease severity

File Courtesy: 
Rice Research Station, Kaul (Kaithal), Haryana
Photo Courtesy: 
Rice Research Station, Kaul (Kaithal), Haryana
1
Aug

Brown Spot disease

Symptoms:

The disease is caused by Helminthosporium oryzae. It produces oval dark brown spots on leaves and plumes.
The disease occurs mostly in deficient and P90r soils and when severe, causes heavy damage both in nursery and in the field.
Management of brown spot:

Correction of soil deficiency and application of balanced nutrition reduces the disease

File Courtesy: 
Rice Research Station, Kaul (Kaithal), Haryana
Photo Courtesy: 
Rice Research Station, Kaul (Kaithal), Haryana
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