This is brought about by irregularities in the temperature, and causes the berries to assume a shrivelled or scalded appearance, as shown in the woodcut (fig. 390). The temperature should not be allowed to sink too low during the night, and the pipes should be kept warm enough for the purpose. In the morning, ventilation should be given when the sun is powerful, to keep the atmosphere in a buoyant state, and to prevent it from becoming too hot and stuffy. As scalding generally takes place during the stoning period, that is the time to take precautions against the evil. Some kinds, notably Lady Downes' Seedling, are more liable to attack than others.