Box Hedge Caterpillars: Signs, Timing and Treatment

Box hedge caterpillars are a common garden pest that can cause serious damage to box hedges if they are not dealt with quickly. These hungry caterpillars feed on the leaves, often stripping plants bare and leaving behind brown patches, fine webbing and thinning foliage. In severe cases, an entire hedge can be defoliated within a short period of time.

Box hedge caterpillars are typically active from April through to October, although the exact timing depends on the weather. They can produce several generations each year, with the first caterpillars usually appearing in spring as temperatures rise and further generations emerging throughout summer and into early autumn. Regularly checking your hedge during this period is the best way to spot an infestation before it becomes severe. Signs to look out for include chewed leaves, green caterpillars with black stripes, fine silk webbing between branches and small green droppings on or around the plant.

If you notice an infestation, it is important to act as soon as possible. Small numbers of caterpillars can be removed by hand, while heavily affected areas can be pruned to help reduce the population. For effective control, treat your hedge with Topbuxus XenTari according to the manufacturer's instructions. Regular monitoring and repeat treatments throughout the growing season will help protect your box hedges from further infestations and keep them healthy, green and looking their best.