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Showing 1 to 16 of 16 for “"potato leafhopper"”.
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Enhancing biotic mortality of the potato leafhopper, Empoasca fabae
<p>This dissertation quantified the population dynamics of E. fabae and developed a new management technique for this alfalfa pest. A two-year study monitored the number of E. fabae at 3 locations within alfalfa fields from mid-April to June and from adjacent tree/shrub species until July. Similar …
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The Potato Leafhopper, Empoasca Fabae, Soybean Pubescence, and Hopperburn Resistance
… interactions between soybean pubescence, potato leafhopper, and onset of hopperburn, a series of experiments was carried out with using field and laboratory colonies of the PLH, and 4 near isogenic soybean cv. 'Clark' differing in the nature of the trichome cover.
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Management of Potato Leafhopper and Maple Spider Mite on Nursery Grown Maples
<p>Potato leafhopper <em>Empoasca fabae</em> (Harris) (Homoptera: Cicadellidae) and maple spider mite <em>Oligonychus aceris</em> (Shimer) (Acarina: Tetranychidae) are important pests of maple trees. Investigations determined how insecticide use and fertilization impacted the abundance of <em>E. …
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Biological Studies on the Potato Leafhopper, Empoasca Fabae (Harris), as an Alfalfa Pest
Made available in DSpace on 2014-12-09T20:27:12Z (GMT). No. of bitstreams: 1 6408403.pdf: 4651873 bytes, checksum: 4c3e65f920bde020f8f0947775ba6566 (MD5) Previous issue date: 1964
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Population studies of the potato leafhopper, Empoasca fabae (Harris), on alfalfa, Medicago sativa L.
The potato leafhopper, Empoasca fabae (Harris), is a primary pest of alfalfa grown in Virginia. Sampling techniques and sampling programs for each growth stage (egg, nymph, and adult) were developed to study the population dynamics of this insect. Distribution patterns exhibited by each stage have …
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Mechanisms by Which Grass Reduces Potato Leafhopper, Empoasca Fabae (Harris) (Homoptera: Cicadellidae), Abundance in Alfalfa
… in order to determine the means by which potato leafhoppers perceive the presence of grass, to determine the behavioral changes caused by grass which lower abundance in alfalfa, and to test the resource concentration hypothesis for the potato leafhopper in alfalfa.
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Environmental Influences on Changes of Populations of the Potato Leafhopper, Empoasca Fabae, in Relation to Alfalfa
Made available in DSpace on 2014-12-05T21:34:05Z (GMT). No. of bitstreams: 1 6202944.pdf: 5103848 bytes, checksum: bda992453320a1bdaf7c76928dac8ee7 (MD5) Previous issue date: 1962
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Effects of insecticides on potato leafhoppers Empoasca fabae (Harris) and its predators
… were evaluated to determine effects on the potato leafhopper and its predators. Three types of tests were conducted. First, the common predators of the potato leafhopper in alfalfa were examined to determine their response to the stages of the leafhopper. Second, under field conditions, …
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Control of the potato leafhopper, Empoasca fabae (Harris), and the influence of leafhopper populations on peanut yields in Virginia
… in Virginia were evaluated for control of the potato leafhopper. Leafhopper populations on test plots were monitored throughout 1975 and 1976 using a 12-inch sweep net. Grade, yield, and value data were collected from all experiments. Significant reductions of leafhopper populations were …
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Combined Roles of Glandular-haired Alfalfa and Natural Enemies in Alfalfa Pest Managment in Virginia
… (Gyllenhal), (Coleoptera: Curculionidae), and potato leafhopper, <i>Empoasca fabae</i> (Harris), (Homoptera: Cicadellidae), remain key pests of alfalfa in Virginia. Commercial varieties of potato leafhopper-resistant (or glandular-haired) alfalfa were released in the mid-1990s, but the impact …
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Impact of carbofuran on spring-seeded alfalfa and associated insect pests
… on alfalfa (Medicago sativa L.) growth, potato leafhopper, Empoasea fabae (Harris), and seedcorn maggot, Hylemya platura (Meigen). No increases in radicle length, trifoliate leaf development, or dry matter resulted from carbofuran application to alfalfa seedlings grown in a growth chamber …
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Erynia Radicans: Studies on Its Distribution, Pathogenicity, and Host Range in Relation to the Potato Leafhopper, Empoasca Fabae (Temperature Relationships, Scanning Electron Microscopy, Epizootiology, Illinois)
Thesis (Ph.D.)--University of Illinois at Urbana-Champaign, 1985.
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Development, implementation, and economic evaluation of an integrated pest management program for alfalfa in Virginia
… program, and $28.13 per hectare from the potato leafhopper scouting program.
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The effects of foliar applications of seaweed extracts on plant growth and pest resistance
… phosphorus, and potassium, or on populations of potato leafhopper (PLH), Empoasca fabae (Harris). For the fourth cutting, fertilizer and kelp*fertilizer effects were observed. Yield and tissue levels of potassium were higher and PLH numbers were lower in fertilized plots. In fertilized plots, …
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Interaction Between Weeds and Insect Pests With Snap Beans (Phaseolus Vulgaris L.)
… sanguinalis L.) and bean leaf beetle or potato leafhopper in snap beans (Phaseolus vulgaris L.) cv ""Matador"". The main treatment was emergence time of either redroot pigweed or large crabgrass relative to snap beans' planting time. Subplot treatments were pigweed or crabgrass density of …
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Effect of several insects on the chemical composition of alfalfa, red clover, and birdsfoot trefoil
… of pea aphid nymphs was 1000 or more. Potato leafhopper (phloem feeder) injury was very characteristic on birdsfoot trefoil. The terminal 1 to 2 inches of the sterns became wilted and bent down. On alfalfa there was gradual yellowing and the retarded growth was evident. The red clover …