Municipality Venray: biological control of oak processionary caterpillars
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 [...] for the Municipality of Venray. ‘We use nematodes at locations in outlying areas where there might be protected species of butterfly and moth. The major [...] generally positive. ‘The trees that we have treated have been 90% cleared. What is interesting is that avenues running east to west are typically free of oak