orange trees host:plantpathology.tamu.edu

Listing 1 - 5 from 5 for orange trees

GROUND COVERS
... sp., and others): The sooty mold fungus may develop on English ivy growing beneath certain trees. This mold lives on secretions of aphids and scale insects which fall from the tree ... rust first appears as neat, yellowish dots near the margins of the leaves; later pale orange pustules break out on the leaf. Usually does not cause enough damage to warrant control ...
plantpathology.tamu.edu

Trees 1
... The orange swellings are more common early in the growing season, particularly in the Gulf Coast area. Two stages of the rust fungus are known: one which occurs on ash trees, ... . Control is accomplished by avoiding mechanical wounds, treating exposed wounds with pruning paint, fertilizing trees as needed and protecting from insects. Powdery Mildew (fungus - Phyllactinia guttata): White powdery fungus ...
plantpathology.tamu.edu

Trees part 2
... depends on finding little black fruiting structures (pycnidia). Remove infected limbs. Avoid wounding trees and sterilize pruning tools. Preventative fungicide sprays may control the leafspot stage. Powdery ... Elm Disease section for details and control.) Rust (fungus - Melampsora medusae): Small, yellowish-orange pustules on lower surfaces of leaves. Pustules later turn dark brown or black. ...
plantpathology.tamu.edu

Trees Part 4
... serious on young trees but has less effect on older trees. Summer Scorch (physiological): Leaves on affected trees have chlorotic margins ... with live oaks. Infected oak leaves have yellow to orange pustules on the lower sides of the leaves. Severe ... trees not known to be a host of Oak Decline. Cotton Wood Pine Baldcypress Arizona Cypress Willow Walnut Hickory Magnolia Cedar Pear (Bradford) Osage-orange ...
plantpathology.tamu.edu

Trees Part 5
... to release quantities of orange spores. Remove galls on specimen trees by pruning. Remove infected trees in planted forests during thinning operations. In nurseries, begin fungicide sprays when oak trees in the area ... through the needle surface. These structures break to release thousands of small pinkish to orange spores. Damage is seldom severe enough to warrant any form of control. Wood Rots: ...
plantpathology.tamu.edu