Nematode dispersal is one of the key features for success as a biocontrol agent. Currently, commercially available nematodes do not disperse sufficiently when they are applied to a field. Since the insect target is mobile, nematodes need to be actively moving and seeking an insect host. We developed a pheromone extract from nematode growth medium that disperses nematodes. This extract was unstable in liquid form. We have found that the extract can be dried to retain activity during storage or shipment. Exposing nematodes to pheromone extract before they are applied to a field activates them to disperse and seek a new host. This exposure needs to be at least 20 min. When nematodes are actively seeking a new host this increases nematode insect encounter and increases insect mortality leading to increased effectiveness of insect nematodes as biological control agents.
