My lettuce has been attacted by a tiny black flie that is rotting the leaves. How do I treat this problem.
02 June 2019 10:31 PM
It is likely the pest that is attacking your lettuce is a cineraria leafminer. The adult of this pest is a very small black fly (about 2 mm long) which usually goes unnoticed. It inserts its eggs into the undersides of the leaves and when the larvae hatch out, they tunnel inside the leaf. Early detection is the key. Remove any leaves that you noticed are damaged and dispose of them. Give regular applications of soluble fertiliser such as Thrive All Purpose Soluble Fertiliser to encourage new growth.
From your friends at Yates Gardening