Biological Activity of the L. (Lamiaceae) Essential Oil on Infested Honeybees.

The present work is conducted as part of the development and the valorization of bioactive natural substances from Algerian medicinal and aromatic spontaneous plants, a clean alternative method in biological control. For this purpose, the bio-acaricidal activity of (sage)essential oil (EO)was evaluated against the , a major threat to the honey bee ssp. .

Effect of protective agents on the viability of geotrichum candidum during freeze-drying and storage.

The effect of 3 cryoprotective agents (trehalose, sucrose, and maltose) on the survival of concentrated cultures of Geotrichum candidum was studied. Initially, the effect of the carbohydrates at 9% and 23% concentrations or combined with skim milk (16%) was compared to the control (skim milk alone) immediately after freeze-drying. Two freeze-drying shelf temperatures, 25 degrees C and 35 degrees C, were investigated.