Municipality Venray: biological control of oak processionary caterpillars
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 action and [...] 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 [...] is that avenues running east to west are typically free of oak processionary caterpillar, while those running north to south still have some nests. It