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Management of Rice stem borer (Tana bedhak)

In Nursery: In 10 - 12 days nursery plant, apply Carbofuran 3G @ 250 gm, or Forate 10G @100 gm per 100 m2 nursery area. Roughing: Tillers showing dead hearts should be removed and their destruction must be outside the field, it reduces the infestation. Biological control: Use 8 Trichochord (Bio-agent Trichogramma) three times (total 24 in numbers), at one week interval just after one month of transplanting for one hectare. Chemical control: Cartop Hydrochloride 4G @ 20 kg/ha is found to be highly effective in controlling the insect populations.

Rice stem borer (Tana bedhak)


Scientific name: Scirpophaga incertulas, Pyraustidae, Lepidoptera Local name: Tana bedhak.

Symptoms of attack: A number of stem borer moths seen dead and floating on the water in the fields. In the vegetative stage, dead hearts seen in the affected tillers and in the reproductive stage, whiteear may be seen.

Nature of damage: The insect may start attacking the plants in the nursery especially long duration varieties.

The incidence is mild in the season June to September, but later on gets intensified from October to January and February.

The caterpillar enters the stem and feeds on the growing shoot. As a result the central shoot dries up and produces the characteristic dead heart.

The tillers may get affected at different stages. When they are affected at the time of flowering the earheads become chaffy and are known as white ear.


Insects in Rice crop of Uttar pradesh

Rice crop of different regions within Uttar Pradesh state is attacked by five major insects. They are-

1. Rice stem borer.

2. Rice gall midge.

3. Rice swarming caterpillar.

4. Rice leaf folder.

5. Rice gandhi bug / earhead bug.


Control Measures for Crab (Khekada)

Manual control measures for crab :

Collection and destruction of crabs using petro max in the beginning of rainy season.

Chemical control measures for crab :

Use of poison baits containing acephate @75 g. or carbaryl @ 100 g or endosulfan 40 ml mixed with 1 kg cooked rice.


Nature of damage of Crab (Khekada)


1. Crabs are polyphagous. They cut the young paddy plants near the ground level and carry them to their burrows for feeding. 2. They are mostly active during nights. Besides this they prepare a series of burrows in the embankment of paddy fields as result of which, water is not retained in the field which is vitally required for crop growth.

Crab (Khekada)


1. Pest Name - Crab.

2. Scientific Name - Paratelphusa spp.

3. Local Name - Khekada.

4. Infestation intensities - Low to moderate.

5. Crop Growth stages - Seedling.


Control Measures for Army worm (Lashkari Ali)

Preventive measures Army worm (Lashkari Ali):

1) Keeping the bunds clean i.e. free off weeds in the beginning of the season.

2) Deep ploughing after harvesting to expose the hibernating stages of the pest to the action of sun and birds.

3) Digging a trench and flooding it with water for preventing the migration of larvae from one field to another.

Cultural Control Measures of Army worm :

1) Collection and destruction of egg masses.

2) Flooding the fields to force the larvae to climb the plants and thus they fall prey of the birds.

3) Harvesting the crop immediately after it attains maturity.

Chemical Control Measures of Army worm (Lashkari Ali):

Spraying with 0.06 per cent cypermethrin 25 EC or 0.1 per cent carbaryl, or dusting with carbaryl 10 per cent dust @ 20kg/ ha based on 4- 5 larvae /sq. m ETL.

Biological Control Measures of Army worm (Lashkari Ali):

Conservation and preservation of frogs in the field.


Nature of damageof Army worm (Lashkari Ali)


1. Young larvae skeletonised the leaves. Later stages become gregarious and voracious eating the whole leaves at night.

2. Final instar larvae which are dark or gray in color have a characteristic habit of climbing the paddy plant and cutting the earheads.

3. Field gives an appearance as if it is grazed by cattle.


Army worm (Lashkari Ali)


1. Pest Name - Army worm.

2. Scientific Name - Mythimna separate.

3. Local Name - Lashkari Ali.

4. Pests characteristics - Sporadic in occurrence preferably after heavy rains followed by a dry spell with cloudy weather.

5. Infestation intensities - Low to moderate.

6. Crop Growth stages - Seedling, tillering and after maturity.


Control Measures for Rice ear head bug( Dhekanya)

Chemical Control Measures for Rice Ear head bug:

Dusting the crop with methyl parathion 2 per cent dust or mathion 5 per cent dust @ 20 kg/ha. Based on 1 bug / hill ETL.

Preventive measures for Rice ear head bug( Dhekanya):

Keeping the bunds surrounding the field clean i.e. free off weeds during off-season and in the beginning of the season

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