UPDATE 26 April 2024
BOX TREE CATERPILLER
As a result of the spring weather, boxwood caterpillars are starting to awaken from their winter hibernation and do damage again. We had called for a first treatment in early April. Due to the cold weather in April, it is advisable to check your plants carefully and treat again if caterpillars are still present.
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
For treatment of fungal diseases, it is still quite early. However, for infected plants that suffered damage last year, a preventive treatment could be useful. If the weather really improves and temperatures rise permanently, a general fungicide treatment is recommended Use preferably 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.