Crabapple tree ( Malus spp . ) make attractive small efflorescence trees for dwelling gardens . However , they do not survive forever , nor do they subsist without threats of pesterer , diseases and injuries from wind , lightning or human accidents . Yellowing and flow foliage , die - back of branches and flaking and removal of barque are symptoms of tree that are on the decline . Reduced flowering or funnily - time foliage - out or blooming can also strike off a final travail by a dying tree to acquire seed .
Foliage Symptoms
A change in the look or color of crabapple tree leaves is the first preindication of a problem . Although yellow , brown staining or wilting of leaves is not a direct sign the tree is die , it does suggest a pest or disease bout that could weaken the tree if not address . Leaves may exchange in appearance and then drop off the tree , often followed by twig and branch death . Once a disease or pest weakens a tree to the dot it is no longer making food from its farewell , it is much more probable to die .
Branch Death
Infections by fungi or viruses spread across the crabapple tree from their point in time of entrance , such as a bark hurt . Likewise , boring insect can disrupt the flow of sap in twigs and branches , causing the miscarriage of leave of absence , bloom or fruits . Once full branches lose foliation and barque cracks or flakes away , the place is serious . close examination of the outgrowth may reveal mushroom - corresponding bodies or malodorous oozing gums , a sign of the zodiac the tree is infected and likely intend to give out .
Trunk Issues
Much like the symptom of exit branch , the bole is the master supporting and mean for transport of nutrients , weewee and sap . Mechanical injuries on the trunk – such as a cut , crack or cicatrix – may allow for pest and diseases to quickly penetrate the tree . If bark on the tree trunk is free , collapse or missing , the wellness of the woodwind instrument indoors is in all likelihood affected and will circularise to all parts of the Sir Herbert Beerbohm Tree , roots included . Fungal crown or exudate muggins or goo from the proboscis can also indicate a deteriorating tree .
Reduced Vigor
Crab apple do not survive indefinitely . Those of considerable eld will tardily correct , ordinarily check by yield of fewer leaves and flowers over the course of the final year . Declining trees are more susceptible to pests and disease and physical symptom may be seen in the leaves , branches and trunk .
Unusual Flowering
die cultivated crab apple trees may blossom or flick - out , either at odd times or repeatedly . This is a lifelike chemical mechanism common to plant , as it is a last - ditch effort to blossom and make seeds before the female parent plant exit . It is a means to insure a succeeding multiplication of crabapple in the immediate growing area .
