Twenty-one rice cultivars were evaluated to determine the difference between populations of Sogatodes oryzicola (Muir) (Homoptera: Delphacidae) in Costa Rica and Colombia, Survival, mortality and population development of S. oryzicola on five selected cultivars was used to determine levels of plant resistance. The importance and potential of the parasitoid-predator Haplogonatopus...
Chlorella is a genus of unicellular, enkaryotic green algae. Chlorella-like algae
are found as endocellular symbionts within a number of animal species. Two chloroplast
genes were sequenced from the exsymbiotic strain Chlorella N la, originally isolated
from Paramecium bursaria. The genes for the large subunit of ribulose-1,5-bisphosphate
carboxylase/oxygenase (rbcL) and...
Seed vigor tests have been developed to evaluate the relative ability of seed lots to produce stands of seedlings in the field. Some workers have suggested the possibility of differentiating vigor levels by germinating seeds under osmotic stress, but have not conducted field trials to evaluate the usefulness of the...
The purpose of the workshop was to exchange information on sampling procedures, research methodologies, preparation and
interpretation of specimen material, terminology, and the application
and significance of findings, emphasizing the relationship of dendrochronology procedures to fire history interpretations.