Chestnut drywood termite

The chestnut drywood termite (Neotermes castaneus) is a wood-infesting insect species belonging to the order Isoptera and the family Kalotermitidae. Unlike subterranean termites, this species completes its entire life cycle within the wood, requiring no contact with the soil to survive.

This pest affects a wide range of woody hosts, including various fruit trees and ornamental landscaping species. It typically colonizes trees through bark crevices, wounds, or existing cavities, eventually tunneling deep into the heartwood to establish its colony and feed on the cellulose.

The biology of Neotermes castaneus is characterized by a social colony structure. Their life cycle comprises eggs, nymphs, and adult castes. The dispersal phase occurs during swarming events, where winged reproductive individuals emerge to find new suitable host wood to settle and propagate, ensuring the spread of the population across the area.

The damage caused by these termites is often internal and goes unnoticed until significant structural integrity is lost. They construct extensive galleries within the wood, packing them with fecal pellets (frass). This weakening makes the tree susceptible to wind damage, secondary fungal rot, and premature death due to systemic vascular impairment.

Effective management and protection strategies include:

• Regular pruning of dead or decaying wood to remove potential colonization sites.
• Prompt treatment of pruning wounds and bark damage using protective tree paints.
• Monitoring for frass piles, which are clear indicators of active termite presence inside the wood.
• Targeted chemical control methods, such as insecticide injections into identified galleries in valuable ornamental trees.