Onion fly
wings. The eggs are laid by the female onion fly on the young leaves, necks of onion seedlings or in the soil close to the base of onion plants. The onion [...] important. The soil must be damp, bright sun must be avoided, as well as a lot of wind otherwise the product dries up too quickly. So, spraying late in the afternoon [...] emerge from the eggs tunnel into the onion bulbs, harming the roots and foliage. This leads to retarded growth, decreased yield, or even death of the plant