My dhan leaves have long yellow stripes from the tip running down the edge, and in the morning I see tiny droplets on them.
3 Answers
Long yellow stripes starting from the leaf tip or edge that look water soaked first, with tiny ooze droplets visible in the early morning, are typical of bacterial leaf blight in paddy. The bacteria enter through wounds and spread fast in standing water and after wind driven rain or storms, especially with heavy nitrogen. Please confirm with a photo to your KVK or agri officer, as some nutrient and physiological streaks can look similar. Because it is a bacterial disease, ordinary fungicides do not work well, so the focus is on management: stop extra urea, drain excess water and avoid splashing flow between plots, and remove very badly affected leaves. Choosing a resistant variety and using clean seed next season is the strongest defence. If your officer advises any product for a severe outbreak it may involve copper based or specific recommendations, but only follow the local KVK recommendation, the label dose and the pre-harvest interval, and avoid moving through the wet field which spreads the bacteria.
Mine flared up right after a windy rain spell. Cutting the nitrogen and draining helped the new leaves come cleaner.
The agri officer told me to stop walking through the wet field, as I was carrying it plant to plant. That advice alone slowed it down.