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Full-Text Articles in Life Sciences
Bionomics Of Two Aspen Bark Beetles : Trypophloeus Populi And Procryphalus Mucronatus (Coleoptera:Scolytidae), Jerold L. Petty
Bionomics Of Two Aspen Bark Beetles : Trypophloeus Populi And Procryphalus Mucronatus (Coleoptera:Scolytidae), Jerold L. Petty
Theses and Dissertations
Beetles of Trypophloeus populi attacked green bark of unhealthy aspen (Populus tremuloides) and hastened the death of the tree. Beetles of Procryphalus mucronatus favored dead bark and were of little significance in the death of the aspen. These two beetle species were distinguished from each other by their primary galleries, eggs, larvae, larval mines, and mating behavior. In T. populi, there were three larval instars and one to one and one-half generations per year; only larvae overwintered, and the eggs of the first generation were present by mid-July. In P. mucronatus, there were two larval instars and one and one-half …
Phytoseiid Predators Of Mite Pests In Utah Apple Orchards, Vichitra Mongkolprasith
Phytoseiid Predators Of Mite Pests In Utah Apple Orchards, Vichitra Mongkolprasith
Theses and Dissertations
Recent efforts to integrate certain Phytoseiid predators in pest (mite) management programs for apples have been somewhat successful and economical in many fruit growing areas. Convenient descriptions and reviews of the literature for species which have been collected from the state are provided to stimulate further work with Utah Phytoseiids. Seven species of Amblyseius and five Typhlodromus are described and notes provided concerning their respective geographic distributions and biologies.
The Comparative Toxicity Of Developmental Inhibitors And Organophosphates On Mosquitoes, Richard L. Orr
The Comparative Toxicity Of Developmental Inhibitors And Organophosphates On Mosquitoes, Richard L. Orr
Theses and Dissertations
Four developmental inhibitors (Altosid, Altozar, ZR-619 and ZR-777) and two organophosphates (Parathion and Abate) were tested on Aedes aegypti under laboratory conditions. When applied to fourth-instar larvae, the organophosphates were more toxic than the developmental inhibitors. Concentrations required for standard kills (LC50 and LC95) were lower for Altosid and ZR-619 than for Altozar and ZR-777. Field applications of Altosid SR-10 controlled Culiseta inornata for two weeks at 4 ounces per acre. With the exception of Dolichopodidae, most non-target aquatic organisms showed little response to Altosid SR-10. Although the developmental inhibitors Altosid and ZR-619 require higher concentrations for mosquito control, they …