First-instar nymphs of periodical cicadas (Homoptera: Cicadidae: Magicicada) were introduced into a 500-cm plot in a relatively pure stand of loblolly pines and into an 1800-cm plot on a mowed grassy lawn to determine whether they could feed on pine and grass roots, respectively. Nymphs and their associated roots were excavated within a 2-year period after introduction. Serial root sections fro...

First-instar nymphs of periodical cicadas (Homoptera: Cicadidae: Magicicada) were introduced into a 500-cm plot in a relatively pure stand of loblolly pines and into an 1800-cm plot on a mowed grassy lawn to determine whether they could feed on pine and grass roots, respectively. Nymphs and their associated roots were excavated within a 2-year period after introduction. Serial root sections fro...

Citation: Lusebrink I, Erbilgin N and Evenden ML (2016) The Effect of Water Limitation on Volatile Emission, Tree Defense Response, and Brood Success of Dendroctonus ponderosae in Two Pine Hosts, Lodgepole, and Jack Pine. Front. Ecol. Evol. 4:2. doi: 10.3389/fevo.2016.00002 The Effect of Water Limitation on Volatile Emission, Tree Defense Response, and Brood Success of Dendroctonus ponderosae i...

Defoliation by the European gypsy moth (Lymantria dispar L.) and subsequent tree mortality have been well documented in the northeastern United States. In this study we evaluate tree mortality after initial defoliation in mixed pine-hardwood stands in the southeastern United States as the range of European gypsy moth expands. In 1993, 46 mature pine-oak and pine-sweetgum stands were selected on...

Southern pine beetles and associated pathogenic fungi represent the largest biotic threat to pine forests in the southeastern USA. The two primary defensive mechanisms of the tree to the beetle-fungal complex are the primary oleoresin flow and the concentrations of preformed and induced secondary compounds. We compared oleoresin flow and concentrations of phloem nutrients, soluble sugars, starc...

Recent, widespread tree mortality in the western U.S. resulting from changes climate, pathogens, insect activity, and forest management practices has led to concerns for many ecologically culturally important species. Within conifers, resin-based defenses have long been recognized as a primary defense mechanism against variety of insects pathogens. Oleoresin produced by trees contain complex mi...

Abstrak. Hutan adalah kesatuan ekosistem berupa lahan yang mengandung sumber daya hayati didominasi pepohonan dalam lingkungan alamnya, hutan memberikan banyak manfaat bagi kehidupan manusia, baik bentuk kayu maupun non kayu. Salah satu hasil bukan (HHBK) pinus. Pohon pinus anggota dari pinaceace dengan batang lurus, membulat dan biasanya tidak bercabang. Hasil analisis data Kelas diameter disa...

Oleoresin flow is an important factor in the resistance of pines to attack by southern pine beetle, Dendroctonus frontalis Zimm., and its associated fungi. Abiotic factors, such as nutrient supply and water relations, have the potential to modify this plant-insect-fungus interaction; however, little is known of the effects of inoculation with beetle-associated fungi on oleoresin flow. We observ...

Pitch pine (Pinus rigida Mill.) is native to North America and has a strong resistance wood nematodes (PWNs). The PWN mechanism of this tree species yet be discovered. In work, we found that the spreading inoculated PWNs in branch P. was significantly suppressed compared those branches Pinus densiflora (Sieb. et Zucc.) koraiensis Zucc.). Dipping resins isolated from mobility conferred higher mo...