Sixteen mature Valencia orange trees on rough lemon rootstock were selected on the basis of approximately equal, naturally occurring populations of Tylenchulus semipenetrans in soil. In March, fruit 1 cm in diameter or less were removed from eight of the trees, which were kept free of fruit for 15 months. In July, 4 months after fruit removal, fibrous root (<2 mm d) mass density of defruited tr...

Water acquisition via the root system of woody species is a key factor governing plant physiology. In order to compare impact water on hydraulic and photosynthetic characteristics different-sized Populus euphratic, which desert riparian tree species, we quantified leaf conductance (KL), stomatal (gs), net rate (PN), predawn midday potential (Ψ), stem δ18O saplings mature trees. The results show...

The redbay ambrosia beetle, Xyleborus glabratus Eichhoff (Coleoptera: Curculionidae: Scolytinae), and its fungal symbiont, Raffaelea sp., are new introductions to the southeastern United States responsible for the wilt of mature redbay, Persea borbonia (L.) Spreng., trees. In 2006 and 2007, we investigated the seasonal flight activity of X. glabratus, its host associations, and population level...

Background: Production of high-quality 3D models trees has a practical application in arboriculture, allowing the assessment, measurement, and recording aboveground structural features individual trees. Commercially available hobby UAVs (uncrewed aerial vehicles) with integrated cameras combination low-cost photogrammetry software package can produce high-definition tree structures low financia...