Municipality Venray: biological control of oak processionary caterpillars
has been more drift during spraying in those places, which means that the nematodes are more easily blown away. In some cases, we have to take curative [...] In the Municipality of Venray a third of the tree stock in the area, some 11,000 trees, is oak. ‘We’ve been using Koppert’s nematode product Entonem as [...] trees that we have treated have been 90% cleared. What is interesting is that avenues running east to west are typically free of oak processionary caterpillar