Apples will be pollinated by nearby apple and crabapple trees. ), are susceptible to many diseases.The good news is that these diseases are often preventable and, even when they aren't, often cause damage mainly on an aesthetic level. Once the eggs hatch, the larvae burrow into the apples. pest and diseases affecting apple tree branches and trunk BARK CRACKED, PATCHES OF BARK SUNKEN DOWN Canker is a fungal infection which enters tree wood at the site of existing damage, normally caused by bad pruning techniques although damage by woolly aphid (see above) can also allow the fungus to enter the tree. They can take 3-4 years to fruit. Apple trees (Malus spp.) Below are a few of the most common apple diseases: Apple Scab. Home »; Apple tree pests, diseases and problems. At some time or other many of us inherit very old, gnarled, unproductive apple trees that simply don’t yield very well any more and may appear as if they are on their last legs. Sticky traps can be hung in the tree near fruit about three weeks after petals fall; two traps for trees less than 8 feet (2 m.) tall, and six traps for those 10-25 ( … Prune trees to encourage an open-centred vase shape – this allows for better air and light circulation. Several diseases and pests affect apple trees, leading to the production of small, distorted or damaged fruit. These exotic pests are a concern for the farming community, as they could threaten the agricultural and horticultural industries and increase the price of production and the cost to the consumer. Support the tree with a stake or frame. It usually appears in early to mid-spring and is more prevalent during rainy weather. Pests and Disease. and other plants in the rose family, like hawthorns (Crataegus spp. At one time - in the UK - it was possible to use a winter tar wash on trees, and this killed the overwintering apple tree pests for the following growing season. It is the perfect time to start thinning fruit clusters and to begin controlling one of the most serious of all apple tree pests. Picking up fallen fruit is critical to help prevent pests and diseases. Fortunately, home growers can avoid most diseases by planting disease resistant varieties. Monitoring apples trees for signs of pests and disease and following good cultural practices can alleviate many problems. Apple tree pests, diseases and problems Rejuvenating old trees. To control the many other insects that attack apple trees, use an insecticide when the blossoms start to drop and then three more times, at two-week intervals. Apple scab is one of the most common and most serious diseases that afflict apple trees. Pest & Disease Control for Apple Trees. As it grows, an apple tree may experience issues such as the presence of pests or diseases. Factors such as location, weather, and upkeep play a part in which issues your apple tree encounters and how well it stands up against them. To control summer diseases, spray the fungicide in early June and then again every 14 days through the middle of August. Apples are not fuss-free plants and growing them will test your patience. Fruit develops on branches that are two-year-old or older, so take when pruning, otherwise you may affect your next harvest. A pest is different to a disease!Apple tree pests are living insects, whereas disease of apple trees are normally fungus types. Although it is costly to control, neglecting or wrongly applying control measures may reduce fruit yield and quality. Scab is the most serious disease of apples and pears in New South Wales. native to Western Australia) can occur. This bulletin describes the most common insect pests and diseases on fruit trees in home gardens. Apple maggot flies – Apple maggot flies lay eggs in developing fruit in June or July. Thin fruit out in late spring/ early summer. In some instances, application of chemical treatments may … A dwarf tree on dwarf rootstock will fruit within 2 years.