My older tomato leaves have brown spots with rings like a target and they are turning yellow and dropping. What is this?
How to control early blight in tomato (tamatar) showing target spot rings on leaves?
VVenkatesh Gowda6 महीने पहले · 271 व्यू
3 जवाब
🌾Farmer.in Krishi Teamविशेषज्ञ ✓6 महीने पहले
Those brown spots with concentric rings, like a target, on the older lower leaves are early blight caused by Alternaria, which spreads in warm, humid weather and defoliates the plant from the bottom up. Manage it with a mix of hygiene and sprays. Remove and destroy infected lower leaves and crop debris, stake and space plants for good air flow, avoid overhead evening irrigation, and rotate away from tomato and potato. Start protective sprays of mancozeb or chlorothalonil when conditions favour disease and switch to a recommended systemic if pressure is high, rotating fungicide groups to avoid resistance. Balanced nutrition keeps plants vigorous and less prone. Always follow the product label dose and waiting period and confirm the schedule with your KVK rather than using a fixed dose.
KKrishnappa6 महीने पहले
It starts on the bottom leaves, so that is where I watch and act first. Picking off and removing the first few spotted lower leaves and starting a protectant spray early kept it from climbing up the plant. If you wait till the middle leaves are hit it is much harder.
MManohar Reddy5 महीने पहले
Staking and wider spacing for air flow helped me as much as the spray. In my crowded, sprawling block the leaves stayed wet longer and the blight raced through. The open, staked rows dried faster after dew and the disease was much slower.