Crab apple trees

Hang traps in mid-June and leave them in place until after harvest. In small orchards of 10-15 trees, hang 1 trap for every dwarf tree, 2 or 3 traps for every semi-dwarf, and up to 6 for each full-size tree. In large orchards place 1 trap every 100 among the perimeter trees in an orchard block. Also use 1 or 2 traps per acre within the block, and put a trap in every wild or abandoned apple and crab apple tree within 400 yards of the orchard. Renew the sticky surface of the balls ev ry 2 weeks by scraping off the accumulated insects and applying new coating. In dusty locations, renew traps more frequently. 

Flowers must be pollinated for fruit to form (see alsop.290). Some apples are "self-fertile"— pollination is achieved by bees flying from flower to flower on the same tree. Others cannot set a crop on their own and need to be planted within bee-flying distance of another cultivar that is both compatible and in flower at the same time. Your neighbors yard is usually close enough. A crab apple can also make an effective pollinator. 

Apples and crab apples are trees with alternate, deciduous leaves. They produce beautiful spring flowers and attractive red or yellow fruit. Apples are common in home orchards. Crab apples are valued as specimen trees smaller species can be used in shrub borders. Birds are fond of crab apple fruit. 

Pests and disease problems on apple trees are covered in the Apple entry beginning on page 21. Crab apples share many of the same problems, including fire blight, cedar-apple rust, powdery mildew, and apple scab. Ibr-tunately, disease-resistant cultivars are available. Some of the best include Adams , with reddish pink flowers Coral Cascade , with white flowers Prarifire , with purplish red flowers and Professor Sprenger , with white flowers. There are also many other resistant cultivars, so check with your local nursery owner or extension agent to learn about the best ones for your area. 

Damage Larvae bore into trunks of apple trees near ground level, girdling the tree or penetrating into heartwood. Other hosts include pears, plums, cherries, crab apples, mountain ashes, and hawthorns. 

The crab apple like fruit of a tree (of the family Rosaceae) that grows in Algeria, Spain, France, and Italy. 

The fruit of various species of hawthorne shrute and trees (of the family Rosaceae) which grow wild throughout the New World and the Old World. Haws refers to the fruits, which resemble crab apples and are between 1/2 and 1 in. (7 to 2.5 cm) in diameter. 

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