Insect defoliation is a major disturbance force in forbetween 1987 and 1993, but single date NIR in each year was negatively correlated with budworm levels in 1993 ested ecosystems. Monitoring outbreaks, and estimating (r520.69 and 20.47). This was because hardwood trees the areas affected, is therefore important for both forest within jack pine stands caused higher NIR reflectance managers and...

Effects of a mixture of the postemergence herbicides acifluorfen and bentazon, and simulated defoliation expected from green cloverworm on population densities of Heterodera glycines were determined in field plots in Iowa. The herbicide mixture and defoliation each suppressed soybean growth. Population densities of H. glycines were generally lower in herbicide-treated than untreated plots. Popu...

Climate change is progressively increasing severe drought events in the Northern Hemisphere, causing regional tree die-off events and contributing to the global reduction of the carbon sink efficiency of forests. There is a critical lack of integrated community-wide assessments of drought-induced responses in forests at the macroecological scale, including defoliation, mortality, and food web r...

Defoliation has frequently been proposed as a means of controlling Cirsium arvense (L.) Scop. (Californian thistle, Canada thistle, creeping thistle, perennial thistle), an economically damaging pastoral weed in temperate regions of the world, but its optimization has remained obscure. We developed a matrix model for the population dynamics of C. arvense in sheep-grazed pasture in New Zealand t...

Recovery following defoliation can be modified by co-occurring site resource limitations. The growth response of young Eucalyptus globulus saplings to two defoliation events was examined in an experimental plantation with combinations of low (-) or high (+) water (W) and nitrogen (N) resources. Artificial defoliation was applied at 3 and 9 months of age to remove ~40 and 55% of leaf area in the...

Quantitative Stfdies on Proteolipide as Incitant of Disseminated Encephalomyelitis in Mice: Chloe Tal and Peter K. Olitsky 420 Fluorescence in -Ultraviolet Light jn--the Study of Boron Deficiency in Celery: Arthur B. Spurt 421 Absence of PhotoiWn in Tl Bacteriophage Irradiated with Ultraviolet in the Dry tate: Ruth F. ill and Harald H. Rous_ _ ---____ _ _ _ 424 Greater Resistance of, the Female...