Buy Do It Yourself Scab Control, Professional Grade Scab Killer Spray
Scabs are fungal diseases that affect numerous types of trees such as apple (including crabapple), peach, toyon, pyracantha, cotoneaster, maple, poplar, willows and others. Damage on leaf tissue is visible as brown, olive green, or black circular lesions that can have a scabby appearance. Leaves that are infested with scab will turn red or yellow and drop prematurely. In addition to spots on leaves, trees that produce fruit can experience severe damage to the fruit as well. Diseased fruit will form similar dark, circular scab-like lesions, can form cracks in the fruit, shrivel or rot on the branch and fall prematurely. In severe examples, even branch dieback can occur on damaged trees. Scab diseases are most active in the spring under mild temperatures and high humidity, so wet springs can promote scab in susceptible trees. The main way in which the disease repeats on trees from year to year is through fungal spores that overwinter of fallen foliage. Due to the ability of the disease to overwinter on fallen leaves and infect trees the following season, it is very important to remove all fallen leaves and fruit each fall to prevent reinfection. One recommended practice for infected trees is to spray them with a foliar liquid fertilizer with urea, which encourages early leaf drop and accelerates leaf decomposition, minimizing the opportunity for disease spores to survive into the next season. When it comes to controls, beyond removing leaves there is not much that is recommended for disease prevention or treatment on most host plants- trees like Maples and Willows are well equipped to survive severe scabbing issues and remain healthy long term. However, apple trees and peach trees in particular should be treated for scab if they exhibit the disease. When treating apple scab or peach scab, preventative fungicides are essential, as once the disease sets in treatment is useless. When your apple or peach tree suffers scab, it is high recommended that you treat the tree going forward with professional fungicides regularly. Most fungicides require applications starting before bud break and then every 2 weeks throughout the growing season to prevent disease from setting in, which can leave fruit inedible and cause dieback in your trees.