Abstract: In order to pest control tobacco there is provided in a gas tight tobacco storage room an inert O.sub.2 lacking atmosphere with O.sub.2 between 0 and 5%, CO.sub.2 between 1 and 20% and the balance N.sub.2. This atmosphere is maintained until mortality of the pest. The system for providing this atmosphere includes essentially a generator, which can be a combustion chamber (1) associated with a catalytic chamber (2) (in the case of an open circuit system in which air is drawn from the atmosphere) or a catalytic chamber alone (in the case of a closed circuit system in which air is drawn from the tobacco storage room itself) and a cooling tower (3).The system is generally provided also with an evaporator (5) and a condenser (6) to control the humidity of the inert atmosphere, and a heat exchanger (7) in which the combustion heat is utilized to heat the inert atmosphere at a temperature which speeds up the mortality of the pest.

Abstract: The apple variety "MERAN" was created by crossing of the varieties Golden Delicious and Morgenduft.It differs from the common apple varieties by earlier yield, an excellent natural resistance against diseases, excellent storability, and superior qualitative properties.