Department of Chemistry, University of Kelaniya, Kelaniya, Sri Lanka Z. Naturforsch. 43c, 790-792 (1988); received May 6/July 1, 1988 Leucinodis orbonalis, Lepidoptera, Pyralidae, Sex Pheromone, (£)-l 1-Hexadecenyl acetate (F)-ll-Hexadecenyl acetate is the major volatile component of the sex pheromone gland of female Leucinodis orbonalis collected from Sri Lanka. (-E')-ll-hexadecen-l-ol was als...

Computing a polygon defining a set of planar points is a classical problem of modern computational geometry. In laboratory experiments we demonstrate that a concave hull, a connected α-shape without holes, of a finite planar set is approximated by slime mould Physarum polycephalum. We represent planar points with sources of long-distance attractants and short-distance repellents and inoculate a...

Research was conducted during 1996-2000 to develop baits for delivering an oral rabies vaccine to raccoons (Procyon lotor) and coyotes (Canis latrans). A bait was sought that: (1) was attractive to the target species, (2) could be distributed by aircraft, (3) was as effective (or more so) than the currently used fish meal polymer bait, and (4) could be produced in large numbers by automated pro...

The relative abundance and seasonal flight activity of dogwood borer, Synanthedon scitula Harris (Lepidoptera: Sesiidae), was measured using weekly records from traps baited with its sex pheromone and deployed in apple orchards, urban landscapes, and native woodland sites in New York, West Virginia, Virginia, North Carolina, and Tennessee in 2005 and 2006. The mean total number of moths capture...

Sex Pheromone, (Z)-5-Tetradecenyl Acetate, (Z)-8-Tetradecenyl Acetate, Ctenopseustis obli­ quana, Tortricidae The sex pheromone of Ctenopseustis obliquana was found to contain (Z)-8-tetradecenyl acetate and (Z)-5-tetradecenyl acetate in approximately 4:1 ratio. No A 11 -tetradecenyl compound was detected in C. obliquana, in contrast with the pheromones thus far reported from species of the trib...

In the moth, Agrotis ipsilon, newly mated males cease to be attracted to the female-produced sex pheromone, preventing them from re-mating until the next night, by which time they would have refilled their reproductive glands for a potential new ejaculate. The behavioural plasticity is accompanied by a decrease in neuron sensitivity within the primary olfactory centre, the antennal lobe (AL). H...