Agathis dammara

Important note: Agathis dammara (the dammar tree) is a majestic conifer of the Araucariaceae family, not a pest itself. In professional forestry, it is subject to attacks by various xylophagous insects that significantly degrade the quality of its high-value timber and resin production.

Taxonomically, the major pests threatening Agathis dammara belong to the order Coleoptera (beetles), particularly families such as Cerambycidae and Buprestidae. These insects are classified as primary or secondary pests depending on the physiological state of the host tree and local environmental conditions.

The primary hosts affected are Agathis dammara specimens growing in plantations or managed forests. Young saplings and trees weakened by drought or mechanical injury are the most susceptible. Infestations lead to significant economic losses by damaging the cambium layer, which disrupts the flow of nutrients and essential resin synthesis.

The biological cycle of these pests involves adult beetles boring into the bark to lay eggs. Upon hatching, larvae create intricate galleries within the phloem and sapwood. This internal feeding process weakens the structural integrity of the tree and makes it highly susceptible to secondary fungal pathogens common in tropical ecosystems.

Damage is characterized by sawdust accumulation at the base of the tree, canopy dieback, and resinous exudates on the trunk. Effective protection strategies include:

• Sanitary pruning and removal of infested timber to disrupt the insect breeding cycle.
• Implementation of pheromone traps to monitor adult beetle activity.
• Application of systemic insecticides for high-value nursery seedlings.
• Enhancing forest health through appropriate silvicultural practices to prevent tree stress.