Rhythms in pheromone production of the male boll weevil.

Male boll weevils, Anthonomus grandis, held in a light regimen of 16 hours of light and 8 hours of darkness released pheromone rhythmically during the 24 hours. The amount released during peaks was typically 20 times the amount released in valleys. The ratio of the two alcohol components of the pheromone also showed a daily rhythm. Under continuous light, both the release of pheromone and the ratio of the two alcohol components were arrhythmic. In darkness, pheromone release was diminished more than tenfold over the 20-day test period.

Metabolism of [14C]glucose in Haemobartonella-like infected erythrocytes in splenectomized calves.

A quantitative relationship was established between glucose utilization by Embden-Meyerhof glycolytic pathway and hexose monophosphate shunt in erythrocytes from splenectomized calves infected with a Haemobartonella bovis-like organism. Parasitized erythrocytes metabolized glucose 3.69-fold above normal. Embden-Meyerhof glycolytic pathway accounted for 99.4% of glucose utilization, and the remainder, by hexose monophosphate shunt.