Winter Tree Care: Identifying Common Tree Diseases in Winter, Part 2
This is the second part of a series on winter tree diseases and disorders. This article examines Armillaria root rot and annosum root rot. Introduction…
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Winter Tree Care: Identifying Common Tree Diseases in Winter, Part 1
This is the first part of a series on winter tree diseases and disorders. This article examines American chestnut blight. Introduction During the winter months,…
Winter Tree Care: Identifying Common Tree Insects in Winter, Part 8
This is the eighth and final part of a series on winter tree insects. This article examines the snow fly and winter moth. Introduction Through…
Winter Tree Care: Identifying Common Tree Insects in Winter, Part 7
This is the seventh part of a series on winter tree insects. This article examines lace bugs and larder beetle. Introduction Through the winter months,…
Winter Tree Care: Identifying Common Tree Insects in Winter, Part 6
This is the sixth part of a series on winter tree insects. This article examines Isabella tiger moth, Japanese Beetle, and knopper Gall Wasp. Introduction…
Winter Tree Care: Identifying Common Tree Insects in Winter, Part 5
This is the fifth part of a series on winter tree insects. This article examines emerald ash borer and galls. Introduction Through the winter months,…
Winter Tree Care: Identifying Common Tree Insects in Winter, Part 4
This is the fourth part of a series on winter tree insects. This article examines elm leaf beetle and elongate hemlock scale. Introduction Through the…
Winter Tree Care: Identifying Common Tree Insects in Winter, Part 3
This is the third part of a series on winter tree insects. This article examines brown marmorated stink bug and Douglas-fir beetle. Introduction Through the…
Winter Tree Care: Identifying Common Tree Insects in Winter, Part 2
This is the second part of a series on winter tree insects. This article examines Asian lady beetle and box elder bug. Introduction Through the…
Winter Tree Care: Identifying Common Tree Insects in Winter, Part 1
This is the first part of a series on winter tree insects. This article examines aphids. Introduction Through the winter months, plants conserve their energy,…
Tree Diseases: Rhabdocline Needle Cast (Rhabdocline pseudotsugae and Rhabdocline weirii)
Introduction Rhabdocline needle cast is one of the most serious diseases to afflict Douglas-fir. The disease is caused by the fungal pathogens Rhabdocline pseudotsugae and…
Tree Diseases: Phomopsis Blight of Juniper (Phomopsis juniperovora)
Introduction Phomopsis blight of juniper, also called twig blight of juniper, nursery blight, cedar blight, juniper blight, or needle blight is a significant fungal disease…
Tree Diseases: Swiss Needle Cast (Phaeocryptopus gaeumannii)
Introduction Swiss needle cast is an important fungal disease of Douglas-fir. It is one of the most common diseases to afflict Douglas-fir, alongside Rhabdocline needle…
Tree Diseases: Downy Mildew (Peronospora and Plasmopara)
Introduction Downy mildew is a plant disease that affects a bevy of economic and ornamental plants. Unlike powdery mildew, which is a true fungus, downy…
Physiological Disorders of Trees: Blossom End Rot
Introduction Blossom end rot is a common physiological disorder of several important fruits and vegetables. It can often be observed in commercial nurseries and home…
Insect Profiles: Spotted Lanternfly (Lycorma delicatula)
Introduction Spotted lanternfly (Lycorma delicatula), also known as lanternm+oth, is a moth-like insect that infests a wide range of plants. It is named for its…
Plant Diseases: Septoria Leaf Spot (Septoria lycopersici)
Introduction Septoria leaf spot, also called septoria leaf blight, septoria leaf blotch, septoria leaf canker, and tomato leaf spot, is a fungal disease that infects…
Insect Profiles: Japanese Maple Scale (Lopholeucaspis japonica)
Introduction Japanese maple scale (Lopholeucaspis japonica), also known as Japanese scale or pear white scale, is an invasive pest that infests a wide range of…
Plant Diseases: Late Blight (Phytophthora infestans)
Introduction Late blight is a serious fungal disease of tomato and potato plants. It is caused by the pathogen Phytophthora infestans. The pathogen was first…
Plant Diseases: Early Blight (Alternaria solani and Alternaria tomatophilia)
Introduction Early blight is a serious fungal disease that afflicts tomato and potato plants. It is caused by two closely related fungi: Alternaria solani and…