Plum curculio cover the wings; however, because of the middle humps they appear to have only two ridges. The plum curculio can be found in apple, nectarine, plum, cherry, peach, apricot, pear and quince. It may also survive on wild plum, hawthorn, and crabapple. It is found most commonly in areas east of the Rocky Mountains and in eastern Canada. The beetles are most active during the spring time when the weather is warm, damp, and cloudy. They are often seen in heavy leafed trees. Plum curculio beetles can cause irreparable damage to a fruit harvest. In badly damaged fruit, one can
Cherry plum cerasifera" var "pissardii" ("P." 'Atropurpurea'). The variety 'Nigra' with black foliage and pink flowers, has gained the Royal Horticultural Society's Award of Garden Merit. "Prunus × cistena" (purple leaf sand cherry) a hybrid of "Prunus cerasifera" and "Prunus pumila", the sand cherry, also won the Award of Garden Merit. These purple-foliage forms (often called 'purple-leaf plum'), also have dark purple fruit, which make an attractive, intensely coloured jam. They can have white or pink flowers. The cultivar 'Thundercloud' has bright red foliage which darkens purple. Others, such as 'Lindsayae', have green foliage. Some kinds of purple-leaf plums are used for