What is the main dietary component of Ambrosia beetles?

The primary dietary component of Ambrosia beetles is the fungus they vector. These beetles establish symbiotic relationships with various types of fungi, which they collect and cultivate within their tunnels in wood. When the beetles burrow into trees, they intentionally introduce fungal spores into the wood, providing a food source for their larvae. The fungi break down the wood, making it more digestible and nutritious for the beetles. This relationship is crucial for the survival and reproduction of Ambrosia beetles, as they rely on the fungus for sustenance.

While wood cells might seem like a potential food source since the beetles do tunnel through wood, it's the fungi that actually serve as their primary diet. They do not feed directly on living trees or plant sap, although the health and viability of the trees can be affected by the beetles’ activity and the fungal growth they promote.