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. To control summer diseases, spray the fungicide in early June and then again every 14 days through the middle of August. Below are a few of the most common apple diseases: Apple Scab. Apple scab is one of the most common and most serious diseases that afflict apple trees. Apple maggot flies – Apple maggot flies lay eggs in developing fruit in June or July. native to Western Australia) can occur. A dwarf tree on dwarf rootstock will fruit within 2 years. Pests and Disease. In some instances, application of chemical treatments may … Once the eggs hatch, the larvae burrow into the apples. Scab is the most serious disease of apples and pears in New South Wales. 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. A pest is different to a disease!Apple tree pests are living insects, whereas disease of apple trees are normally fungus types. Thin fruit out in late spring/ early summer. 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 ( … and other plants in the rose family, like hawthorns (Crataegus spp. This bulletin describes the most common insect pests and diseases on fruit trees in home gardens. Although it is costly to control, neglecting or wrongly applying control measures may reduce fruit yield and quality. Apples will be pollinated by nearby apple and crabapple trees. Fortunately, home growers can avoid most diseases by planting disease resistant varieties. Support the tree with a stake or frame. It is the perfect time to start thinning fruit clusters and to begin controlling one of the most serious of all apple tree pests. 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. Home »; Apple tree pests, diseases and problems. Prune trees to encourage an open-centred vase shape – this allows for better air and light circulation. Apple trees (Malus spp.) 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. Picking up fallen fruit is critical to help prevent pests and diseases. It usually appears in early to mid-spring and is more prevalent during rainy weather. Several diseases and pests affect apple trees, leading to the production of small, distorted or damaged fruit. ), 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. Apples are not fuss-free plants and growing them will test your patience. Apple tree pests, diseases and problems Rejuvenating old trees. Monitoring apples trees for signs of pests and disease and following good cultural practices can alleviate many problems. 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. Fruit develops on branches that are two-year-old or older, so take when pruning, otherwise you may affect your next harvest. Pest & Disease Control for Apple Trees. As it grows, an apple tree may experience issues such as the presence of pests or diseases. 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