Vine Weevils are the bane of most gardeners; the adults damage the leaves and their larvae reek havoc eating the roots of many plant species particularly in containers. Control them by watering these nematodes into your soil or compost around the base of each plant whether in the ground on container. Treats up to 12 square metres.These microscopic parasites feed off the larvae first stopping them feed then killing them within seven days. They are only effective in late spring and early summer, once the soil has warmed up (above 5°C).