Update 9 September 2026
BOX TREE CATERPILLER
The second generation of the box tree moth is still active, and reasonable numbers of moths are still being caught. However, we are already seeing young caterpillars appearing in some places. It is therefore advisable to inspect your plants and, if you find larger caterpillars, to consider an early treatment. By the end of September, most of the eggs will have hatched and further treatment can still be carried out.
More info on our page about Box tree caterpiller
BOXWOOD BLIGHT
The disease pressure from boxwood fungi on common boxwood is currently very high, so it is best to treat it.
Using less susceptible or resistant varieties can reduce or eliminate this disease pressure.
More info on our page about Boxwood Blight
BOX TREE CATERPILLER
The caterpillars are bright green with a black head. This Asian butterfly can grow as big as 4 cm. There are two generations in Belgium : April/May and August.
BOXWOOD BLIGHT
The investation starts with black spots on the leaf. A few days later the affected leaves will fall down en masse and black stripes appear on the young twigs.