Within a week the eggs hatch. The hatched larvae, which are white with black heads, crawl through the soil damaging the plant's roots. In sufficient numbers, the larvae weaken the plant which may die. There can be many generations in a year. The tiny Springtail is sometimes mistaken for a flea because of its ability to jump.
Some varieties feed on plants and as they love moisture many are found in basements and near drains.
Insects are visible on soil surface after watering. Apply to cover soil surface and work into 3 - 5 cm. Give plant thorough watering. Repeat as necessary. Remove or cover all food and utensils before treatment.