Phylogeography of the bark beetle Dendroctonus mexicanus Hopkins ( Coleoptera: Curculionidae: Scolytinae). Anducho-Reyes MA(1). ABSTRACT: The Mexican pine beetle (XPB) Dendroctonus mexicanus, is recorded here for the first time as a new introduction for the United States (US). Semiochemicals of Dendroctonus mexicanus, the Mexican pine beetle. Phylum: Arthropoda. Subphylum: Uniramia. Class: Insecta. Order: Coleoptera. Family.

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Burks of the U. The feeding of woodpeckers on broods of Dendroctonus beetles in the bark of infested trees is very common in the pine forests of the United States, and at times is considered to be an important factor in the natural control of the beetles. Full grown larva and young adult in cells in outer hark of Pinus mxeicanus.

Even during the coldest months of the year – November, December and January – temperatures during the middle of the day were high enough to insure some feeding and development of larvae. Where the land was privately owned, it was possible to get the owners to provide the labor to cut, limb and peel the infested trees. However, observations of the egg-galleries constructed by D. Oxford University Press is a department of the University mexicajus Oxford. The complete invasion of the stem by this species generally requires 7 to 10 days.

Dendroctonus mexicanus (DENCME)[Overview]| EPPO Global Database

The new adults mine directly outward from the pupal cell through the bark and emerge completely developed and capable of immediately initiating a new attack on living pines. Differences in Character of Pitch Tubes.

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The adult insect as described by Hopkins averages 3. These results indicate that eradication work on D. In Hopkins described the adults of this species as averaging 3. Your comment will be reviewed and published at the mexucanus discretion. This structure can be analyzed with respect to the biogeographic pattern that describes the species in a region. The declivity of the elytra is excavated and each side is armed with four short acute teeth.

EPPO Global Database

Rinehart; Genetic Structure of Dendroctonus mexicanus Dsndroctonus It furthers the University’s objective of excellence in research, scholarship, and education by publishing worldwide. Tree now fallen to ground. Average Development of Dendroctonus mexicanus.

mexicanud Because of this, infestations have run unchecked in the forested areas of ejidal lands. The primary attack by D. As the forest gradually changes with increasing preight from predominantly P.

Schwerdtfeger, have been investigating similar bark beetle epidemics in Guatemala. However, the attack did not end in these isolated stands; a sudden outbreak, approximately 5 acres 2 ha. You must accept the terms and conditions. I agree to the terms and conditions. This habit has been studied in a closely related species in California, D.

However, some information on both natural and artificial control of the beetle is available and will therefore he included mexivanus.


Unasylva – Vol. 5, No. 4 – Pine bark beetles of Central Mexico

The forester of the Unidad marked the trees to be cut and supervised the burning of the infested limbs and tops. However, it was noted that infestations occurred during the coldest months of the year which suggests the absence of a dormancy period in the life cycle. Wood-peckers working on Ponderosa pines infested by Dendroctonus brevicomis have been found to account for as high as 75 percent of the broods. Some trees of Pinus montezumae var.

Allele frequencies, average heterozygosity, heterozygosity by locus, deviations from Hardy—Weinberg equilibrium HWEF-statistics among populations, and average genetic flow were calculated.

Replanting of these clear cut areas with more resistant species, such as P.

On the northern and north-eastern exposures cedars Cupressus benthamii Endl. Email alerts New issue alert. A number of predatory beetles were found in and around the trees infested by D. When the resin flow ceases, the tunnel is curved sharply and extended down and around the stem in a winding, elongated “S” shaped pattern.

Pine bark beetles of Central Mexico by J. It can be seen from the data on the developmental period that it is possible to obtain four generations of insects per year.