Filbert Bud Mite Scientific Name: Phytocoptella avellanae The filbert bud mite is a very small eriophyid mite that feeds on and within leaf and flower buds and catkins (male flowers) Feeding causes buds to swell to larger than normal size...
Coryneum Blight or Shot Hole Disease Pathogen: Stigmina carpophila, syn. Coryneum carpophilum or Wilsonomyces carpophilus Coryneum blight is also called shot hole disease, California blight, peach blight or pustular spot. Severe foliar shot holing may weaken a tree, while the...
Brown Mite Scientific name: Bryobia rubrioculus Brown mites overwinter in the egg stage. Eggs are red and spherical but do not have a stipe rising from the top. Newly hatched brown mites have six legs and are bright red. After they molt...
Yellow Aphids Scientific names: Yellow pecan: Monelliopsis pecanis Black margined: Monellia caryella Aphids are small, soft-bodied insects that suck sap from pecan leaves. There are two species of “yellow” or “honeydew” aphids, the black-margined aphid, Monellia caryella, and the yellow...
Panicle and Shoot Blight Pathogen: Botryosphaeria dothidea; conidial stage: Fusicoccum sp. Vegetative and flowering buds that were killed during the previous fall or winter do not emerge in spring. In mid-spring (end of May to June) buds that were partially...
Powdery Mildew Pathogens: Sphaerotheca pannosa and Podosphaera tridactyla Powdery Mildew can attack plants at any stage of maturity, but it is most prevalent in late summer and early fall when nights are damp and cool and days are warm and...
Maple Gall Scientific Name: Eriophyidae Maple, Acer spp., leaves are often infested with a wide variety of brilliantly colored, odd-shaped galls and blotches. Some of these abnormal plant cell growths called galls are caused by very small eriophyid mites in...
