White tip nematode: Aphelenchoides besseyi Christie

Local name: Bili Tudi Roga

Vernacular Name:

            The white tip nematode affects rice crop grown in humid areas. It is widely distributed and now occurs in most of the rice growing areas.

Period of occurrence : Tillering stage

Extent of yield loss: 30-50%

Damage Symptoms:

• White tip or whip like malformation of the top one-third of the leaf blade.
• In flowering tillers, chaffiness and abnormal elongation of glumes in some spikelets

Management:

Preventive measures:

• Soak the seeds in water for 24 hours, later hot water treatment at 52°C for 10 min
• Hot water seed treatment 520C for 15 Minutes.
• Pre soak in water 24 hr.
• 51-530^°C for 15 min.

Chemical control:

• Apply carbofuran 3 G @ 13 kg or phorate 10G @ 5 kg or fipronil 0.3G @ 13kg per acre of nursery, 5 to 7 days before pulling the seedlings for transplanting.
• Fumigation with methyl bromide 1.251b/ 1000 ft3 for 6 hours.