Tillering and Panicle Initiation Stage

Panicle initiation stage starts, farmers need to be very careful during this week.

Weed control-

For grassy weeds, you can apply within 15-20 days:

• Cyhalofop-butyl 250-300 ml/acre.
• Fenoxaprop-P-ethyl 200-250 ml/acre.

For broadleaf weeds, you can apply within 25-30 days:

• 2,4-D sodium salt 500-600 gr/acre.
• 2,4 D ethyl ester (2,4 DEE) 1-1.25 lt/acre.

Blast-

Leaf Blast-

• Severe cases of infection – entire crop give a blasted or burnt appearance- hence the name “BLAST”
• Severe cases – lodging of crop (after ear emergence).

Neck Blast-

• Neck region of the panicle develops a black color and shrivels completely / partially grain set inhibited, the panicle breaks at the neck and hangs.

Nodal Blast- 

Nodes become black and break up.

Management-

Cultural method-

• Remove collateral weed hosts from bunds and channels
• Use only disease free seedlings
• Avoid excess nitrogen
• Apply N in three split doses (50% basal, 25% in tillering phase and 25% N in panicle initiation stage)
• Use resistant variety CO 47.

Chemical Method-

• Spray after observing initial infection of the disease,
• Carbendazim 50WP @ 500g/ha (or)
• Tricyclozole 75 WP @ 500g/ha (or)
• Metominostrobin 20 SC @ 500ml/ha (or) 47
• Azoxystrobin 25 SC @ 500 ml/ha

Pre-tillering to Mid-tillering-

• Light at 2 to 5 % disease severities – Apply Carbendazim @ 0.1 %. Delay top dressing of N, fertilizers when infection is seen. Panicle initiation to booting.
• At 2 to 5% leaf area damage spray Carbendazim or Tricyclazole @ 0.1 %.

Flowering and after flowering-

At 5 % leaf area damage or 1 to 2 % neck infection spray Carbendazim or Tricyclazole @ 1 g /lit of water.