Sugarcane Twenty-third to twenty-fourth week practices

Rust:

Symptoms:

• Minute, elongated, yellow spots (uredia), usually 2-10 x 1-3 mm appear on both the surfaces of young leaves. The pustules turn to brown on maturity. Late in the season, dark brown to black telia appear on the lower surface of leaves.

Management:

Cultural Control: 

Use resistant varieties like Co 91010 (Dhanush), Co 87025 (Kalyani). 

Mechanical Control:

Remove and destroy the alternate host Oxalis corniculata. 

Chemical Control:

Spray the crop with Mancozeb 75% WP @ 500-600 g/acre dissolved in 250-300 lit. of water twice or thrice OR Dusting of sulfur@10 kg/acre.