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Pest & Disease Management

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 VIII. Pest & disease management

 

Effective pest & disease management is required as it helps in producing better quality grains and better yields. Major Pests of Rice in Andhra Pradesh are


1. Stemborer

 

2. Gallmidge

 

3. Leaf folder

 

4. Hispa

 

5. Leaf mite

 

6. BPH/WBPH

 

7. Panicle mite

 Major Diseases of Rice in Andhra Pradesh are;

 

1. Sheath blight

 

2. Blast

 

3. BLB

 

4. Stem rot

 

5. Red stripe

 

6. Sheath rot

 

7. False smut
 




Pest control during panicle and booting stage

PESTS

CROP  STAGE

CHEMICAL CONTROL

BPH/ WBPH


Panicle initiation to booting stage


Spray acephate @ or monocrotophos @ 2.2 ml or ethofenprox @ 2.0 ml or fenobucarb @ 2.0 ml or imidacloprid @ 0.25 ml or thiamethoxam @ or Buprofuzin 1.6ml per litre of water.

Stem borer


Panicle initiation to booting stage


Car tap hydrochloride 50 WP or acephate or profenophos 2.0 ml /litre of water (or) apply car taphydrochloride 4G @ 8 kg/acre when the adult moths/egg masses @ one/ sq.m are noticed in the field.

Leaf folder


Panicle initiation to booting stage


Spray car taphydrochloride or acephate or profenophos 2.0 ml /litre of water

Panicle mite


Panicle initiation to booting stage


Spray profenophos 2.0 ml or dicofol 5.0 ml/litre of water

BPH/ WBPH


Post flowering


Spray acephate @ or monocrotophos @ 2.2 ml or ethofenprox @ 2.0 ml or fenobucarb @ 2.0 ml or imidacloprid @ 0.25 ml or thiamethoxam @ or Buprofuzin 1.6ml per litre of water

Cut worm


Post flowering


dichlorvos @  1.0 ml + endosulfan @  2.0 ml (or) dichlorovos 1.0 ml +

chlorpyriphos 2.5 ml/litre of water


Disease management

 

Disease

 

Time of application

 

Fungicide

 

Dose

No. of applications &

time interval

 

Sheath blight

 

At   the  initiation of  the  disease. Normally around  45  days  after transplanting in kharif and 30 days after transplanting in rabi


 

Hexaconazole 5EC Validamycin 3L Propiconazole25  EC


 

@ 2ml/l

@ 2ml/l

@ 1ml/l


 

 sprays   at   15-day interval

 

Blast

a) Leaf blast

 

At the initiation of the disease under favourable weather conditions


 

Tricyclazole 75 WP/ Isoprothiolane 40 EC


 

@ 0.6g/ml

@ 1.5 ml/l


 

2 to 3 sprays depending on the severity  & spread of the disease at 15 days interval

 

b) Neck blast

 

i) Under disease favourable weather conditions just before panicle emergence stage


 

Tricyclazole 75 WP/ Isoprothiolane 40 EC


 

@ 0.6g/ml

@ 1.5 ml/l


 

One spray

 

ii) On appearance of the disease

 

Tricyclazole 75WP/ Isoprothiolane 40 EC


 

@ 0.6g/ml

@1.5 ml/l


 

One spray


 

 

BLB

 

No chemical available. Management is mainly through rationalization of nitrogenous fer tilizer application


 

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Stem rot


 

At  the appearance of the disease (Normally from maximum tillering to crop maturity stage)


 

Validamycin 3L / Hexaconazole 5EC / Propiconazole 25 EC / Carbendazim 50 WP/ Benomyl 50 WP


 

@ 2ml/l

@ 1ml

@ 2ml/l

@ 1g/l

@ 1 g/l


 

2 to 4 sprays at 10-15 days interval depending how much early the disease has been noticed

 




 

Red stripe

 

At  the appearance of the disease from advanced boot leaf  to crop maturity stage

 

Carbendazim 50 WP

 

@ 1g/l

 

One spray

 

Sheath rot

 

At the appearance of the disease or at panicle emergence stage


 

Carbendazim 50WP


 

@ 1g/l


 

One spray

 

False smut


 

At flowering  stage


 

Propiconazole 25 EC/ Copper       oxycloride

50WP /  Carbendazim

50WP


 

1.0ml/l

2.0g/l

1.0g/l


 

One     spray      during evening hours


 

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