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Chionaspis pinifoliae, the pine needle scale insect, is a common species of scale insect found on pine, spruce and other conifers across Canada and throughout the United States. [1] The species is particularly persistent on planted spruce in the Prairie Provinces in both rural and urban settings. In heavy populations, the needles may appear to ...
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Fiorinia theae is a polyphagous scale insect of woody plants, infesting the underside of the leaves. Apart from tea plants in Asia, ornamental Camellia and Ilex species are the main hosts. Many other plants are infested less regularly. [5] ScaleNet lists more than 20 genera from 18 plant families as hosts, including various crops and ornamental ...
The spores from Diplodia sapinea fungus typically first develop on the structures that will eventually develop on the “black fruiting structures that form on needles, fascicle sheaths, scales of second year seed cones, and bark” [6] During the wet/rainy season, (depending on the location, could be from early spring until late fall) where the wet weather and wind can allow the spores to ...
Many White Pine trees turn yellow this time of year because of normal “needle drop” on the inside branches.
The scale insects excrete honeydew on which bees, wasps, ants and other insects feed. Sooty mould fungus often grows on the honeydew and this decreases the area of leaf available for photosynthesis, spoils the appearance of the plant and reduces the marketability of fruit. [4] It is especially damaging to young trees after transplanting. [5]
Fusarium circinatum is a fungal plant pathogen that causes the serious disease pitch canker on pine trees and Douglas firs (Pseudotsuga menziesii).The most common hosts of the pathogen include slash pine (Pinus elliottii), loblolly pine (Pinus taeda), Monterey pine (Pinus radiata), Mexican weeping pine (Pinus patula), and Douglas fir. [1]
The brown soft scale does not normally kill the host plant, but the loss of sap probably causes it to grow more slowly and crop less heavily. The main disadvantage to the host is the sooty mould which grows on the honeydew. This reduces the area of leaf available for photosynthesis, and spoils the appearance of the plant, its flowers and fruits ...