This larva comes from the tipula, an insect of the order Diptera belonging to the tipulidae family. The adult resembles a large mosquito but does not bite. It is commonly called "cousin". The larva resembles a grayish maggot about 4 centimeters long, which is nicknamed "leather jacket".
Why are tipula larvae harmful?
If the adults are harmless, the larvae cause concern, especially in summer, from May to August. They tend to hatch in wetlands and devour the roots of plants.
What are the most endangered plants?
Tipula larvae specifically attack the roots of grasses, vegetables and lawns. An infested lawn turns yellow and can die in no time.
How to fight against the crane fly larvae?
As the crane prefers a humid environment, it is recommended to moderate watering of the lawn and to promote good drainage of the soil to avoid standing water. A bacteria (Steinernema feltiae) can also be inoculated into the larvae by diluting powdered nematodes in the irrigation water.