598 results — topic: Insect Ecology
Data from: No evidence that gut microbiota impose a net cost on their butterfly host
Gut microbes are believed to play a critical role in most animal life, yet fitness effects and cost benefit-tradeoffs incurred by the host are poorly understood. Unlike most hosts studied to date, butterflies largely acquire their nutrients from larval feeding, leaving relatively little opportunity
Data from: Short-term, low-level nitrogen deposition dampens a trophic cascade between bears and plants
Human activities have substantially increased atmospheric nitrogen (N) deposition in ecosystems worldwide, often leading to higher plant quality for herbivores and greater herbivory. Predators frequently suppress herbivores and indirectly benefit plants via ‘trophic cascades’, and the strength of th
Bumblebee foraging: can observed preferences of two bee species be explained by their foraging efficiencies on flowers of two different plant species?
Insect oviposition patterns in flowers of <i>Helianthella quinquenervis</i>
The effect of adult food limitation on life history traits in Speyeria mormonia (Lepidoptera: Nymphalidae)
Variation in food availability is likely to occur in the wild, and may affect resource allocation to various life history traits. Quantitative adult diet restriction had no effect on life—span or mean individual egg mass, but reduced fecundity in the butterfly Speyeria mormonia. The sum of fecundity
Control of Pyrethroid Resistant Colorado Potato Beetle, Grand Forks, North Dakota, 1991
Abstract This experiment was located on the Red River Valley Potato Growers Research farm in Grand Forks, ND. The field was planted on 28 May using cut A-size 'Norchip' certified seed. Plots were four rows, 0.9 m wide, 7.6 m in length, with a 1.5 m fallow aisle at the end of each plot. Plots were ar
Factors influencing host plant range in two lycaenid butterflies
Factors correlated with the productivity and distribution of temperate ants of the genus <i>Myrmica</i>
Can <i>Speyeria mormonia</i> detect nectar in a floret? A study in butterfly foraging behavior
Interactions between two carrion beetle species: <i>Nicrophorus americanus</i> and <i>Silpha lapponica</i>
Eggs, enzymes, and evolution - natural genetic variants change insect fecundity
Phosphoglucose isomerase genotypes in the butterfly Colias differ dramatically in biochemical properties. These differences were evaluated earlier, using metabolic network theory, to predict, successfully, their effects on glycolytic metabolism and hence on Colias flight capacity and several consequ
Observations of a high altitude population of the sage stem-galling fly Eutreta diana (Diptera: Tephritidae) and its associated parasitoids
Colorado Potato Beetle Control with Biological and Synthetic Insecticides, Pasquotank County, 1989
Abstract Su perior' potatoes were planted near Weeksville, N.C. Single row plots, 6 . 1 B long with rows 1.06 m apart were replicated 4 times in a randomized complete block design. Treatments were applied using a COa pressurized sprayer with a single hollow cone nozzle (18 X) operating at 60 psi to
Control of Colorado Potato Beetle with Natural Product Insecticides, Grand Forks, 1990
Abstract Natural product insecticides used in this experiment were Bacillus thuringiensis var. san diego (MYX 1806), B. thuringiensis var. tenebrionis (Trident and BK-102) and azadirachtin (Margosan-O) from the neem tree, Azadirachta indica. Plots were planted 15 May at the Research Farm, Red River