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The letters "DB" are the initials of David Brown, the owner of Aston Martin between 1947 and 1972. [7] [8] Although the DB9 succeeded the DB7, Aston Martin did not name the car DB8 due to fears that the name would suggest that it featured a V8 engine—the DB9 has a V12. [9]
Dendroctonus brevicomis, the western pine beetle, is a species of crenulate bark beetle in the family Curculionidae. It is found in North America [ 1 ] [ 2 ] [ 3 ] and parts of Mexico. [ 4 ] It is known as a destructive pest of ponderosa and Coulter pine trees. [ 5 ]
The insect has a 1-, 2-, or 3-year life cycle, with 2-year being the most common, in which the flight and attack period starts in June or soon after most of the snow around the trees has melted. About 6 galleries per 929 cm 2 , each about 12.5 cm long and parallel with the grain of the wood, are made in the inner bark, and 3 to 4 groups of eggs ...
Dendroctonus is a genus of bark beetles.It includes several species notorious for destroying trees in the forests of North America. The genus has a symbiotic relationship with many different yeasts, particularly those in the genera Candida and Pichia that aid in digestion and pheromone production.
Bark beetles enter trees by boring holes in the bark of the tree, sometimes using the lenticels, or the pores plants use for gas exchange, to pass through the bark of the tree. [3] As the larvae consume the inner tissues of the tree, they often consume enough of the phloem to girdle the tree, cutting off the spread of water and nutrients.
In response to the unprecedented spread of bark beetles in the Rocky Mountains and other parts of the western United States, the U.S. Forest Service formed the Western Bark Beetle Research Group (WBBRG) in 2007—a collaboration between scientists from three research stations that pools knowledge and resources to better understand the threat and eventually develop a strategy to combat it. [10]
Hello all, I have listed this article, Aston Martin DB9, for peer review because I'd like to get it to featured article status. There are only five featured articles based on automobiles, and I would like to increase that substantially given the number of views these articles can get. Thanks in advance, and any comments are appreciated (but try ...
The southern pine beetle (Dendroctonus frontalis), a bark beetle, is a major threat to pine trees in the southeastern United States. Its reproductive cycle is controlled by varying ratios of certain natural chemicals, including verbenone. To reproduce, pine bark beetles aggregate in large numbers in their host pine trees.