Apple trees are known for their beautiful flowers and delicious fruit. However, apple trees, a sudden wilting and death. Insects and disease are the two most common causes of wilting apple leaves, and both can cause reduced fruit yield and reduced plant vigor.
Aphids are common pests of a variety of trees such as apple, elm, plum, willow, currant, juniper, rose and walnut. Some species of aphids do not cause serious or visible damage to host trees, but some can have serious side effects such as sudden wilting or reduced strength. Aphids are very small pests and difficult to see with the naked eye. These pests live mostly on the undersides of apple leaves, where they feed on the leaves extracted sap. Become as a result of feeding apple leaves speckled, wilt and curl. Death of new shoots can cause feeding on aphids, as well. Aphids can be a disorder known as gray sooty mold to develop on infected apple trees. Black sooty mold fungi is that abides by Apple from the honeydew produced by aphids during feeding can cause.
Fire blight is a disease that is often on crabapples and mountain ash and apple trees. This disease causes wilting of flowers, black fruit and a whole burnt appearance. Some apple varieties are resistant to mildew, like Red Delicious fire. Golden Delicious, Jonathan and Lodi are considered susceptible to fireblight. Sucking insects such as aphids carry, often feeding bacteria and create an entry point for fire blight bacteria. Apple trees with fire blight often oozes a milky substance and mummified fruit is, however, remains on the tree.
Aphids are often controlled by spraying your apple tree leaves with a hard stream of water from a garden hose. This process raises aphids from apple leaves and keep their populations low. Perform this task twice a week for best results. Fire blight can be controlled by your apple tree healthy and strong. Avoid applying nitrogen-rich fertilizer and prune any diseased limbs, sterilizing cutting tools between cuts.
Horticultural oils are effective in eliminating and controlling aphid infestations on apple trees. These products work in contact with the insects, so be sure to completely cover the leaves with oil. Horticultural oils to remove sooty mold fungi, as well. Fire blight often requires streptomycin sprays to control. Follow all instructions on the manufacturer's label and never use this product closer than 50 days on apple trees to harvest States North Carolina State University.