In a critical advisory issued on 28th December 2024, Punjab Agricultural University (PAU) has warned potato farmers across the region to immediately halt sprinkler irrigation practices due to increasing risks of late blight infection. This warning comes amid ongoing western disturbances, accompanied by light-to-moderate rainfall and persistent dense fog conditions in Punjab.
Understanding the Threat of Late Blight
Late blight, a devastating plant disease, manifests initially as small, green water-soaked spots on potato leaves. Agricultural experts at PAU emphasize that these seemingly minor symptoms can rapidly evolve into extensive dark brown or black lesions with a greasy appearance, particularly during cool and moist weather conditions. A distinctive pale green-yellow border typically surrounds these lesions, serving as a clear indicator of infection.
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Critical Prevention Measures
PAU specialists have outlined specific preventive measures to protect potato crops. The primary recommendation is the immediate cessation of overhead sprinkler irrigation. Farmers are advised to conduct irrigation activities during daylight hours, ensuring foliage dries completely before nightfall.
Chemical Control Recommendations
For effective disease management, PAU recommends applying Indofil M-45 fungicide at a rate of 500-700 grams per acre. In cases where the disease has already manifested or risk levels are elevated, farmers should implement a more aggressive treatment protocol. This includes spraying with specialized fungicides such as Curzate M-8, Melody Duo 66.75 WP, Ridomil Gold, or Sectin 60 WG (700g/acre). Alternative options include Revus 250 SC (250ml/acre) or Equation Pro (200ml/acre), with applications recommended every 10 days.
Additional Weather Concerns
The university has also highlighted the increased risk of frost damage in the coming days. Farmers are urged to maintain vigilant monitoring of their fields and implement appropriate protective measures for crops, orchards, and vegetables.
Summary
This urgent advisory from PAU addresses the immediate threat of late blight in potato crops across Punjab, providing crucial guidelines for irrigation practices and chemical control measures. The combination of current weather conditions and disease risk necessitates immediate action from farmers to protect their potato yields.
