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Comparisons Between Blacklight and Pheromone Traps for Monitoring the Western Bean Cutworm (Lepidoptera: Noctuidae) in South Central Idaho
Results of this study suggest that pheromone traps can be used to replace the standard blacklight trap, which is expensive, nonselective, bulky, and dependent upon a power source.
Ovipositional Preference of the Cotton Fleahopper, Pseudatomoscelis seriatus, and Distribution of Eggs Among Host Plant Species
L Laboratory studies showed that flowering Monarda punctata, and flowering Croton capitatus were favored over other host species and other phenological stages as oviposition sites as eggs were deposited in a pubescent cotton variety than in a glabrous variety.
Patch and prey utilization behaviors by Aphelinus albipodus and Diaeretiella rapae (Hymenoptera: Aphelinidae and Aphidiidae) on Russian wheat aphid (Homoptera: Aphididae)
The results agree with the observation that A. albipodus remained for extended periods on wheat plants with many aphids, allowing development of additional eggs and parasitization of more aphids and seem likely to limit its rate of spatial spread during a growing season relative to D. rapae.
Integrated Pest Management of Insects, Plant Pathogens, and Weeds in Dryland Cropping Systems of the Great Plains
Habitat and Season in Structuring Ground-Dwelling Spider (Araneae) Communities in a Shortgrass Steppe Ecosystem
Overall, the spider communities differed between grass and mixed-grass/shrub habitats in their response to seasonal change, and these differences in community composition were similar both years of the study.
Distribution of Western Bean Cutworm Eggs Among Short-, Mid-, and Long-Season Corn Hybrids Planted on Different Dates
- T. O. Holtzer
- 1 October 1983
Overall, plots with the earliest mean growth stage tended to receive the greatest number of eggs at all sampling dates, and egg distribution for that year showed a tendency for plants that were just beginning to tassel to receive more eggs than earlier or later growth stages.
Ambulatory dispersal behavior ofNeoseiulus fallacis (Acarina: Phytoseiidae) in relation to prey density and temperature
Data suggest that there are at least two recognizable types of ambulatory search used by N. fallacis—the random-walk type, which is used when prey density is high (searching within prey patches), and the edge-walking behavior, which was used when predator-prey density is low.
Modeling Spatial Variation of Russian Wheat Aphid Overwintering Population Densities in Colorado Winter Wheat
- S. Merrill, T. O. Holtzer, F. Peairs, P. Lester
- Biology, MedicineJournal of economic entomology
- 6 April 2009
A spatially explicit model developed from field observations in a wheat/fallow agroecosystem was sought for predictable variation in overwintering success of D. noxia based on environmental factors such as topography and soil type to facilitate early control efforts targeting locations where D.noxia successfully overwintered.
Abundance and Effects of Predators and Parasitoids on the Russian Wheat Aphid (Homoptera: Aphididae) Under Organic Farming Conditions in Colorado
Predator and parasitoid exclusion studies using cages showed aphid populations to be between 2.6 and 11.2 times higher in cages compared with wheat plants exposed to natural enemies, and D. noxia was the most abundant aphid.
Temperature and Humidity Effects on Ovipositional Rates, Fecundity, and Longevity of Adult Female Banks Grass Mites (Acari: Tetranychidae)
The intrinsic rate of natural increase (rm) was influenced by temperature and humidity and this provides a possible explanation for the occurrence of BGM in areas that are characterized by warm, dry weather conditions.