UPDATE 5 April 2024
BOX TREE CATERPILLER
As a result of the spring weather, boxwood caterpillars are starting to wake up from hibernation and cause damage again. Treatment is indicated as of now. In gardens, you can preferably use spinosad-based products (Conserve Garden) authorised in organic cultivation. Other biological agents against caterpillars are available in other European countries.
Preferably spray in the evening to spare beneficial insects and, of course, during dry weather. Only the green parts of the plant need to be treated.
More info on our page about Box tree caterpiller
BOXWOOD BLIGHT
It is still too early to treat fungal diseases. However, treatment is recommended from the beginning of May, especially for infected plants that suffered damage last year. Preferably use the recommended products in our schedule.
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.