Introduction Brown rot blossom blight is a fungal disease that infects a bevy of stone fruit trees. The disease is caused by the pathogen Monilia fruiticola. Monilia fruitocola invades susceptible…
Introduction Bacterial leaf spot is a disease that affects various crops and ornamental plants. It is most often caused by the bacterial pathogens Pseudomonas spp. and Xanthomonas spp. The infectious…
Introduction Seiridium canker is a fungal disease caused by three species of fungi in the genus Seiridium. Of the three, Seiridium cardinale is the most widespread, affecting various members of…
Introduction During the winter months, frigid temperatures and heavy winds can combine to produce fierce storms. Winter storms can feature abundant precipitation – often in the form of ice or…
Introduction Oak leaf gall mite (Pyemotes herfsi), also known as itch mite, is an ectoparasitic insect in the genus Pyemotes. It is a secondary invader of oak trees that parasitizes…
Introduction Hypoxylon canker of oaks is a fungal disease caused by the pathogen, Hypoxylon atropunctatum. The fungus infects weakened, injured, and dying wood on oak trees. The fungus generally infects…
Introduction Spruce spider mite (Oligonychus ununguis) is a small pest that infests numerous conifers. The insect is native to North America. It is one of the most destructive spider mites…
Introduction Honey fungus, or Armillaria, comprises a genus of parasitic fungi that infect a variety of plants. It is one of the most destructive fungal diseases in the world. The…
Introduction Knopper gall wasp (Andricus quercuscalicis) is a gall wasp species that infests two types of oak trees: common oak, and turkey oak. The word knopper is derived from the…
Introduction Magnolia scale (Neolecanium cornuparvum) is an insect that feeds exclusively on magnolia plants. It is one of the largest scale insects in the United States. The insect feeds by…