Onion fly
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 fly larvae that emerge [...] fly damage. Small tunnels made by the larvae as they feed can also be seen in the bulbs. The bulbs may occasionally soften or decay, which may be a sign [...] nematodes are applied by spraying. After application, the nematodes set out in search of the larvae, eventually killing them. The fact that this biological