which in turn is the entry point for fungal infection of the cherry fruit after rainfall.

At the fruiting stage in June/July (Europe), the cherry fruit fly (Rhagoletis cingulata and Rhagoletis cerasi) lays its eggs in the immature fruit, whereafter its larvae feed on the cherry flesh and exit through a small hole (about 1 mm diameter), 

which causes leaves at the tips of branches to curl, with the blackfly colonies exuding a sticky secretion which promotes fungal growth on the leaves and fruit.

In Europe, the first visible pest in the growing season soon after blossom (in April in western Europe) usually is the black cherry aphid ("cherry blackfly," Myzus cerasi), 

Generally, the cherry can be a difficult fruit tree to grow and keep alive.

'Burlat' is an early variety which ripens during the beginning of December, 'Lapins' ripens near the end of December, and 'Sweetheart' finish slightly later.

In the Southern Hemisphere, cherries are usually at their peak in late December and are widely associated with Christmas.

In many parts of North America, they are among the first tree fruits to flower and ripen in mid-Spring.

In southern Europe in June, in North America in June, in England in mid-July, and in southern British Columbia (Canada) in June to mid-August.

Cherries blossom in April (in the Northern Hemisphere) and the peak season for the cherry harvest is in the summer.