Biological control of the oak processionary caterpillar can be done with nematodes; Steinernema feltiae. The nematodes enter the caterpillar and secrete a bacterium that will kill the caterpillar within a few days. At Biopol you have come to the right place for biological control of the oak processionary caterpillar. If you would like more information about biological control of the oak processionary caterpillar, please feel free to contact us.