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20
Jul

Life stages of Rice case worm

Egg: Eggs are light yellow, disc like, smooth and irregular in shape. They are laid on the underside of the leaves floating on the water.

Larva: They hatch into green caterpillars with orange brownish head. Each caterpillar lives inside a tubular case and hang down the leaves. The tubular cases are open at one end. The inside of the case is lined with silk to hold a thin film of water, which is essential for respiration and preventing desiccation of the

19
Jul

Rice case worm

Order: Lepidoptera

Family : Pyraustidae

Scientific name : Nymphula depunctalis

Local name:

19
Jul

Symptoms and Nature of damage of Paddy gall midge

Symptom of attack Paddy gall midge: The central shoot instead of producing leaf produces a long tubular structure. When the gall elongates as an external symptom of damage, the insect will be in pupal stage and ready for emergence.

Nature of damage Paddy gall midge: The maggot bores into the growing point of th

19
Jul

Control of Paddy Gall Midge

1. Ploughing under the ratoon of previous crops can reduce infestation.

2. Control of grassy weeds and wild rice (alternate hosts) from surrounding areas can reduce Gall midge incidence.

3. Avoiding staggered planting (complete planting in an area within 3 weeks) to reduce infestation.

4. Apply carbofuran 3G @ 25 kg ha-1 (or) phorate 10 G @ 10 kg ha-1 or fipronil 0.3 G @ 25 kg ha. –1

19
Jul

Life Stages of Paddy Gall Midge

Egg: The fly lays elongate, cylindrical, shinning white or red or pinkish eggs singly or in clusters (2-6) at the base of the leaves.

Maggot: Maggot is 1 mm long after hatching with pointed anterior end. It creeps down the sheath and enters the growing bud. An oval chamber is formed round the site of feeding.

Pupa: At the time of emergence the pupa wriggles up the tube with the help of antennal horn to the tip of the silver shoot

19
Jul

Paddy Gall Midge

Order: Diptera

Family : Cecidomyiidae

Scientific name : Orseolia oryzae

Local Name:

19
Jul

Symptoms and Nature of damage of Rice Stem Borer

Symptoms of attack of Paddy stem borer: 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 of Paddy stem borer: The insect may start attacking

19
Jul

Control of Paddy Stem Borer

1. Apply carbofuran 3G @ 25 kg ha-1 (or) phorate 10 G @ 10 kg ha-1 or cartap 4 G @ 25 kg ha-1 or fipronil 0.3 G @ 25 kg ha. –1 or chlorpyriphos 10G @ 10 kg ha-1. 2. Spray quinalphos 25 EC @ 1600 ml ha-1 or monocrotophos 36 WSC @ 1100 ml ha-1or chlorpyriphos 20 EC @ 2000 ml ha-1or
19
Jul

Life Stages of Paddy Stem Borer

Egg: Eggs are creamy white, flattened, oval and scale like and laid in mass. Each egg mass consists of 15-80 eggs and covered with buff coloured hairs. Before hatching, the eggs darken to a purplish tinge. They are laid mostly near the tip of the leaves.

Larva: The hatched larvae move downward and wander about on the plant for 1 or 2 hours. They may hang down by a sliver thread and get to other plants with the help of the wind. They can also swim over t

19
Jul

Paddy Stem Borer

Order: Lepidoptera

Family : Pyraustidae

Scientific name : Scirpophaga incertulas

Local name:

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