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…
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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…
Insect Profiles: White Prunicola Scale (Pseudaulalacaspis prunicola)
Introduction White prunicola scale (Pseudaulalacaspis prunicola) is an armored scale insect that infects members of the Prunus species, and various other ornamental plants. It is…
Insect Profiles: White Peach Scale (Pseudaulacaspis pentagona)
Introduction White peach scale (Pseudaulacaspis pentagona), also called white scale, West Indian peach scale, and oleander scale, is an armored scale insect that infests various…