Kannada Name: Yelekavachada Kole Roga

Sheath rot is a important fungal disease where semi-dwarf and high yielding cultivars are used.

Period of occurrence: Heading to maturity stage

Extent of yield loss:

• Conditions favorable for the pathogen:
• Dew, cooler climatic conditions
• High relative humidity
• High levels of nitrogenous fertilizers

Sources of inoculum: Seed

Symptoms:

• Oblong or irregular spots with chocolate brown coloration may develop on boot leaf sheath
• Young panicles may not emerge and rot completely or emerge only partially
• Grains inside the chocked panicles and on the partially emerged panicles may be chaffy, light to dark brown and covered by a white to light-pink mat of mycelium and spore mass.
• Grains may be partially or completely filled and glume  discoloration is noticed

Sl. No.

Chemical name

Trade name

Dosage per l of water

Dosage for spray tank

10 l

12 l

16 l

Liquid/Spray formulations (EC, SL, WP, WG, WDG, SC)

1.

Carbendazim 50 wp

Bavistin, Jkstin, Derosal

1.0 g

10g

12 g

16 g

2.

Ediphenphos 50 EC

Hinosan

1.0 ml

10 ml

12 ml

16 ml

3.

Thiophenate methyl 75 WP

Roko

Topsin-m

1.0 g

10 g

12 g

16 g

4.

Propiconazole 25 EC

Tilt

1.0 ml

10 ml

12 ml

16 ml

5.

Hexaconazole 5 EC

Contaf

2.0 ml

20 ml

24 ml

32 ml