How to Get Rid of Leaf Miners on Tomato Plants
Tomato plants attract several leaf-mining moths and sawfly species. These insects lay eggs inside a leaf. The larvae live in a leaf, where they create long wavy tunnels. You will notice that the width of the tunnels increases as the larvae grow. A mature larva drops to the soil to pupate. Pupae grow into adults, and the cycle continues.
Most of us wait until the pupa stage to control fleas. However, there are a few methods you can apply to prevent leaf damage early on. The one effortless way is to get rid of all the leaves infested with leaf miners. This only works when there are a few leaves affected. If you have a bigger infestation, go for organic sprays.
Place a plastic tray at the base of your tomato plants to prevent mature larvae from falling onto the soil. Check the tray daily and kill any larvae you find. If you find more than ten of them daily, advance to an organic pesticide.
Drench your crop in Spinosad, which is made from a soil bacterium, every seven to ten days. Repeat until there are no pupae on the aforementioned tray. Plowing the soil before planting helps bury existing pupae deep into the soil.