As they burrow and feed inside the leaves, Leaf Miners leave a meandering trail of mines or tunnels as they feed.

In most cases a little bit of Leaf Miner damage isn’t a problem, however severe infestations can negatively affect the health and vigour of the plant.

Prevention

Companion planting with plants that attract or repel species of Leaf Miner can be used to decrease the chance of infestations in more important plants or crops. Useful companion plants include radishes, onions, garlic, and marigolds.

Nasturtians can be planted as a sacrificial crop.

Natural Treatment

Spray with BioNeem as this affects and interrupts the natural life cycle of the Leaf Miner, reducing the number of eggs and larvae.

Spraying to get to the adult fly is difficult, timing is crucial. The best way to monitor for adults is to place some leaves infected with Leaf Miner into a clear bag, as soon as you see flies hatching it is time to spray as this will kill the adults.

Bugtrol can be used to help control the adult insects and the eggs but won’t be effective once the larvae has burrowed into the leaves.

Other treatment

Spray with Success Ultra, for best results spray in the evening when adult flies are present.

However to avoid a build of resistance to this spray it is recommended that you use it on crops no more than 5 times a year. Use sparingly, and if possible go with our natural option.

When using sprays and chemicals always read the label and follow instructions carefully. Spray in the evening to avoid harming beneficial insects.