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Disease treatment
I have just found light coloured blotches on

Red Campion and similar discolouration on nearby plants. Can anyone help with identification and how to deal with it ? Thanks .
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Looks like leaf miner. If possible, pick off and destroy at the first sign, to break the lifecyle (the grub eventually drops off into the soil, where it emerges as a fly to lay eggs and repeat the cycle). On red campion you could snip the whole plant to below the first affected leaf.