In response to a looming threat of late blight infection, the Punjab Agricultural University (PAU), Ludhiana, has issued an advisory for farmers cultivating potato and tomato crops. With weather forecasts predicting a Western Disturbance, light rain, dense fog, and temperatures ranging from 7°C to 21°C over the next few days, farmers are urged to take preventive measures to safeguard their crops.
Late blight is a serious fungal disease that can cause significant damage if not addressed quickly. It initially appears as small, water-soaked spots on leaves, which can rapidly grow into large, dark brown or black lesions, particularly in cool and moist conditions. These lesions are often surrounded by pale green to yellow borders and can spread quickly, posing a threat to entire crops. Additionally, late blight can move from infected potato fields to tomato crops, increasing the risk of crop loss.
To mitigate this threat, PAU highlights the importance of regular field monitoring and staying vigilant about weather conditions. Farmers are advised to avoid overhead sprinkler irrigation, especially during the night, as wet foliage creates a conducive environment for the disease. Instead, irrigation during the day is recommended to allow leaves to dry before nightfall.
For preventive action, spraying crops with the contact fungicide Indofil M-45 at a rate of 500-700 grams per acre is suggested. If the disease has already been detected or conditions for its spread are highly favorable, farmers should opt for more robust fungicides such as Curzate M-8, Melody Duo, Ridomil Gold, Sectin 60 WG, Revus 250 SC, or Equation Pro.
These should be applied at recommended doses and intervals of 10 days. PAU strongly advises against using under-doses or self-prepared mixtures to avoid the emergence of resistant pathogen strains.
Farmers are reminded that proactive disease management is critical. By following the advisory, they can protect their crops and secure their livelihoods against the damaging effects of late blight.
