The diel fluctuations in the abundance of alfalfa weevils, as
measured by sweeping, were studied during 1972 and 1973 in three
of the four major alfalfa growing regions of Oregon. It was found
that in all regions studied significantly more new generation adults
could be captured after dark than during...
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...
The genus Ochodaeus Serville contains approximately sixty
species and is World wide in its distribution. One-half of these
species are known from the Nearctic and Neotropic regions.
Adults of six previously described species common to the
United States have been studied in detail. The mandibles, stridulatory
peg, and male genitalia...
The genus Lichnanthe Burmeister contains eight extant and one
fossil species which are strictly nearctic in distribution. The
subfamily Glaphyrinae, however, is distributed nearly world-wide.
Five species were previously described and three are described as
new herein. All eight extant species are described in detail herein,
synonomies are made current,...
Rhyacophila is one of the largest genera of caddisflies, containing
about 465 species. Approximately 100 species are found in
North America with 83 occurring in the west, The larvae of 24
western North American species are associated for the first time,
making a total of 38 species for which larvae...
