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Among bark and ambrosia beetle pests that disperse various fungi, the degree to which the beetle and its symbiont are each responsible for causing host damage varies from system to system – for example, Harringtonia lauricola represents a true pathogen of Lauraceae vectored by Xyleborus glabratus, but others merely facilitate the mass ...
The MSU HISL database contains a worldwide species list of Xyleborini, a major group of ambrosia beetles, from the Catalog of Scolytidae and Platypodidae of S.L. Wood and D.E. Bright (1992) A USDA-sponsored information resource and key Archived 2018-12-08 at the Wayback Machine to the world genera of Xyleborini; American Bark and Ambrosia Beetles
The ambrosia beetles (such as Xyleborus) feed on fungal "gardens" cultivated on woody tissue within the tree. Ambrosia beetles carry the fungal spores in either their gut or special structures, called mycangia, and infect the trees as they attack them. Once a beetle chooses a tree, they release spores of this fungus along tunnels within the tree.
It has been shown that the beetle is attracted to the smell of this fungus, which may concentrate attacks on specific trees. The beetle can infest branches as small as 1.5 cm (0.6 in) across and trunks 2.5 to 6 cm (1.0 to 2.4 in) in diameter. [5] This beetle is polyphagous, infesting many species of host trees. [7]
Some ambrosia beetle species cause economic damage as a result of tree damage. [4] These beetles are generally difficult to control with pesticides. In a Tennessee based study investigating ambrosia beetle control methods, X. saxesenii were found to attack live chestnut trees. [4]
The chemical has a pleasant characteristic odor. Besides being a natural constituent of plants, it and its analogs are insect pheromones. In particular, verbenone when formulated in a long-lasting matrix has an important role in the control of bark beetles such as the mountain pine beetle and the Southern pine bark beetle.
Corneyanus bark beetles have a “stout” and “remarkably big body,” reaching about 0.2 inches in length, researchers said. They have “relatively large” eyes, antennae with “club ...
The beetle penetrates through thin or cracked bark in the canopy branches. [1] It first invades and kill branches in the canopy of a tree, then spreads to the trunk, culminating in the death of the tree. [2] The females produce two or more generations annually. Large populations can develop in the lower trunk over a number of growing seasons.
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