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Question : Do the hybrids require additional quantities of fertilizers?
Answer :

No, The recommended dose of fertilizers for hybrids is same as that for high yielding varieties. As hybrids utilize nutrients more efficiently and are also more responsive to management, the yields are higher than that of HYVs even under the same dose of fertilizer application.

Question : How symptoms of brown spot and leaf blast differ in paddy ?
Answer :

Brown spot fungus produces oval, eye-shaped spots with a conspicuous dark-brown spot in the centre and light brown margin. The spot is surrounded by yellow halo. Spots are also produced in the grains. The blast fungus causes spindle shaped spots with grayish centre and brown margin on the leaves at maximum tillering. It also causes brown lesions on the neck of the panicle showing neck rot symptoms and the panicles fall over.

Question : Suggest control of sheath blight of rice ?
Answer :

To control sheath blight, spray the crop as soon as the disease is noticed at boot stage with Tilt 25 EC @ 200ml or Monceren 250 SC (pencycuron) @ 200 ml or Bavistin 50 WP (carbendazim) @ 200g in 200 litres of water per acre by directing the spray towards the base of the plant. Give one more spray after 15 days.

Question : Suggest control of stem rot of rice ?
Answer :

The fungus affects the stem at earing and black lesions are produced on the sheath at water level. Later on, the stem gets infected and rots leading to withering and lodging of the plant. 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.

Question : Suggest control of false smut of rice ?
Answer :

To control false smut, give first spray of Blitox 50 WP (copper oxychloride) @ 500 g in 200 litres of water per acre at boot stage of the crop in disease prone areas followed by second spray with Tilt 25 EC @ 200 ml in 200 litres of water after 10 days interval.

 

Question : Suggest the precautionary measures for minimizing the incidence of bacterial leaf blight of rice ?
Answer :

• For the management of bacterial leaf blight, grow rice varieties PR 120, PR 115, PR 113 and PR 111 which are resistant to some of the pathotypes of the bacterial leaf blight pathogen.

• Do not apply excessive dose of nitrogen. Nitrogen should not be applied beyond six weeks after transplanting (except when LCC is used).

• Do not pond water in the field.

• Treat seed before sowing to kill primary inoculum, see “Seed Treatment” under Agronomy Practices.

(a) Do not grow nursery under shade.

(b) Rice crop itself should not be grown in the shady area.

The growing of rice in the area near Bhusa stack (Kup) should be avoided.

Question : Suggest optimum time/stage for fungicidal application for management of brown spot?
Answer :

This disease occurs in poor soils, therefore, give adequate and nutrition to the crop. 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. The first spray should be given at boot stage and second after 15 days.

Question : Suggest the control measures for foot rot free seed production in basmati rice ?
Answer :

Bavistin 0.2% + streptocycline 0.01% for 12 hrs + seedling root dip in Bavistin 0.2% for 6 hrs.

Bavistin 0.05% + streptocycline 0.01% for 12 hrs +T. harzianum 15g/kg seed + seedling root dip in T. harzianum 15 g/litre of water for 6 hrs.

Rogue infected seedlings in nursery.

Spray Tilt at boot stage.

Question : Name a recently identified bacterial blight resistant variety of rice?
Answer :

PR 120.

Question : How to control bacterial leaf blight in rice?
Answer :

Do not apply more nitrogen. Spray Blitox 3g + Streptomysin 1mg per liter of water. Drain the water from the field.

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