Dichlorvos and acetylcholine increase 32P-labelling of phospholipids in cricket central nerve cords.

The susceptibility of central nerve cord phospholipids of Acheta domesticus to stress caused by acetylcholine and the organophosphate insecticide dichlorvos was determined in vitro. Both dichlorvos (10(-5) and 10(-4)M) and acetylcholine (5 X 10(-5)M) stimulated increased labelling of nerve cord phospholipids by 32P. Dichlorvos caused a significant release of radiolabelled material to the medium, while acetylcholine did not.

Nantucket pine tip moth,Rhyacionia frustrana: Identification of two sex pheromone components.

Two compounds identified as components of the sex pheromone system ofRhyacionia frustrana are (E)-9-dodecen-1-yl acetate (I) and (E)-9,11-dodecadien-1-yl acetate (II), which were found in female gland extracts in the ratio of 96∶4, respectively. The identifications were based on chemical and instrumental analyses, electroantennogram studies, and field trapping tests. The optimum ratio for trapping maleR.

Arachidonic acid: Occurrence in the reproductive tract of the male house cricket (Acheta domesticus) and field cricket (Gryllus spp.).

Reproductive tissues from male house and field crickets were investigated for the presence of arachidonic acid. Arachidonic acid was identified by retention behavior on 3 gas liquid chromatographic column systems-SE-30, OV 225, and Silar 10C-and by gas liquid/positive ion chemical ionization mass spectrometry. Arachidonic acid constituted 0.