Fire scar analysis is a fundamental tool for reconstructing fire regimes in conifer forests. However, little known about properties tropical montane conifers, where some assumptions limit dendroecological research. These include that fir species do not exhibit external scars and pines without have experienced past fires. This study describes patterns two growing Mexican temperate forests: sacre...

Commercial harvests can threaten tree species harvested for their bark. Amphipterygium adstringens is a dioecious tree, endemic to the tropical dry forests of Mexico, where it intensively its medicinal Limited information hinders developing sustainable management strategies A. adstringens. We assessed bark regeneration male and female trees, evaluated effect sex diameter, debarking treatments c...

Iterative equations were developed that predict the encounter rate between a population of moving animals and a population of stationary objects, where the animals cease to search upon finding an object. The encounter rate through time depends on the number of searching animals (bark beetles), number of stationary objects (host trees), average speed of the animals, average radius of the object,...

Samples of southern yellow pine outer bark and wood were tested in compression to determine values for modulus of elasticity, stress at proportional limit, and maximum crushing strength. Results reported here resolve inconsistencies in the compressive strength data previously reported by others for pine bark. Testing of solvent-treated bark blocks suggests that although extractives are present ...

While the results of a twoseason study at only one location are too limited to conclude that incorporation is never necessary (it is likely that there are soil or weather conditions for which incorporation provides superior growth) they indicate that there are a variety of composts and weather conditions for ● Blanket applications of all three composts produced as much planted vegetation as tes...

The potential of tree bark, a by-product the woodworking industry, has been studied for more than seven decades. Bark, as sustainable raw material, can replace wood or other resources in numerous applications construction. In this study, acoustic properties bark-based panels were analyzed. roles particle size (4–11 mm and 10–30 mm), orientation (parallel perpendicular) density (350–700 kg/m3) s...

When invasive herbivorous insects encounter novel plant species, they must determine whether the novel plants are hosts. The Mediterranean pine engraver, Orthotomicus erosus (Wollaston), an exotic bark beetle poised to expand its range in North America, accepts hosts after contacting the bark. To test the hypothesis that O. erosus accepts hosts on the basis of gustatory cues, we prepared bark a...

Saraca asoca commonly known as asoka, which is considered as a sacred tree by Hindus and Buddhists possesses various medicinal uses. The stem bark of the tree is the principal constituent of several ayurvedic preparations which are widely prescribed in leucorrhoea, haematuria, menorrhagia and other diseases of the female genitourinary system. Because of destructive extraction and the absence of...

Since ancient times, plants have been an exemplary source of medicine. Ayurveda and other Indian literature mention the use of plants in treatment of various human ailments. Ficus bengalensis Linn is a large evergreen tree found throughout forest tracts of India. It is popular indigenous system of medicine like Ayurveda, Siddha, Unani and Homeopathy. In traditional system of medicine various pl...

Xylem resin-a supersaturation of resin acids in terpenesappears to play a paradoxical role in the relation of the Pinaceae to tree-killing bark beetles. It has been suggested as the agent responsible for the susceptibility of this coniferous family to beetle attacks. And, at the same time, it has been linked with the ability of the Pinaceae to resist bark beetles. The hosts of treekilling bark ...