author(s)
Mahluga Alieva and Ilhama Safarova

abstract
Based on the research which was held in the Nakhchivan Autonomous Republic in 2014-2017, it was found out that the Vespa crabro L. scaly wasp appears in late April and early May when an average daily temperature is 20 ºC. From the third decade of May, the wasp begins to lay eggs, and the first larvae appear at the end of the third decade of May. Their development continues approximately 14 days. Young worker wasps start their foraging activities a few days after they leave the pupa. Going outside they move around the nest for a few minutes and fly away. Hornets mainly feed their larvae by bees. According to our information their mass appearance starts on the third decade of June and continues until the first ten days of September.