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Filtering by: Creator Hartman, Margaret Jane, 1943-

The effects of four anticholinesterase compounds on the embryology of Acheta domesticus (L.) (Orthoptera: Gryllidae)

Creator:

Hartman, Margaret Jane, 1943-

Abstract:

Two organophosphates (Ruelene and Tiguvon) and two carbamates (Sevin and Baygon) were administered topically at various sublethal concentrations to cricket eggs. All the pesticides caused an immediate decrease in the acetylcholinesterase (AChE) activity level in the embryo, but the level usually returned to normal within three days after dosage. The...

Resource Type:

Dissertation

Full Text:

. ) (Orthoptera: Gryllidae) by Margaret Jane Hartman A THESIS submitted to Oregon State University in
Comparative embryology of Nomia melanderi, Megachile rotundata, and Bombus griseocollis (Hymenoptera:Apoidea)

Creator:

Hartman, Margaret Jane

Abstract:

Organogenesis was observed in different age embryos and first instar larvae of Nomia melanderi Cockerell (Halictidae), Megachile rotundata (Fabricius) (Megachilidae), and Bombus griseocollis (DeGeer) (Apidae) (Hymenoptera : Apoidea). It was found that, with the exception of the ventral nerve cord, comparable organ development had occurred by the beginning of the...

Resource Type:

Masters Thesis

Full Text:

, Megachile rotundata, and Bombus griseocollis (Hymenoptera: Apoidea) by Margaret Jane Hartman A