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Showing 1 to 12 of 12 for “"Empoasca fabae"”.
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Enhancing biotic mortality of the potato leafhopper, Empoasca fabae
… 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 numbers of …
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The Potato Leafhopper, Empoasca Fabae, Soybean Pubescence, and Hopperburn Resistance
To determine the detailed 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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Effects of insecticides on potato leafhoppers Empoasca fabae (Harris) and its predators
… relative toxicities of Nabis americoferus to 50° Empoasca fabae and Lygus lineolaris were obtained by deriving the selectivity ratios. Selectivity ratios are calculated by dividing the LC₅₀ of the non-target organism divided by the LC₅₀ of the pest. The ratios indicated that most of the …
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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
The apparent repellency of grass was investigated 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 …
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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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Control of the potato leafhopper, Empoasca fabae (Harris), and the influence of leafhopper populations on peanut yields in Virginia
New and standard pesticides applied to peanuts (Arachis hypogaea L.) 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 …
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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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The effects of foliar applications of seaweed extracts on plant growth and pest resistance
… 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, kelp temporarily reduced …
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Combined Roles of Glandular-haired Alfalfa and Natural Enemies in Alfalfa Pest Managment in Virginia
… 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 of alfalfa weevil on …
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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. …