Studyingleafshape and the arrangement of leaves on a stem is the most common way of identifying a tree in the field during the growing season. The novice taxonomist usually starts with atree leaf shape, which is determined by the presence or absence of lobes. Sometimes, it is possible to n...
Elm seed bugs are relatively harmless to trees because they consume the seeds only, but elm leaf beetles consume leaves, which skeletonizes the foliage. This can make it more difficult for trees to take in the nutrients they need, which leaves them vulnerable to more serious issues. Elm leaf...
This tree’s leaves can be found in the Pacific Northwest, stretching from California to as far north as Alaska, with Oregon being its primary location. Its shiny, green leaves turn reddish-brown in the fall and can measure 12 to 24 inches when fully grown. The tree is the largest of i...
tree identification, the colour of the leaves (e.g. pale green, yellow green, medium green, dark green) and the pubescence are helpful. There are trees that have leaves which are densely felted on the underside of the leaf. A good website for easy identification of a tree based on the...
European elm scale (Gossyparia spuria) is a pest that feeds on elm tree twigs, branches and leaves, causing premature leaf drop and leaf yellowing. Heavily infested branches may die. Read More Armillaria Root Rot Armillaria root rot, also known as ‘honey fungus’ or ‘shoestring root rot’...
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When it comes to the most common North American trees, the red alder is number one. Also known as Alnus rubra, its Latin name, this deciduous tree can be identified by oval-shaped leaves with serrated edges and a defined tip, as well as rust-red bark. Mature red alders range from abou...
Woolly aphids produce lumps of white waxy fuzz on branches, buds or on leaves. This cottonwool-like substance is much more likely to be noticed before the aphids themselves. It distinguishes them from the many other types of aphid which may attack plants. Woolly aphids are unremarkable green-...
length and have a horn-like protrusion on the last segment of their body. While these garden pests prefer tomato plants, they also eat potato, eggplant and pepper plants. Hornworms feed on the upper leaves of plants and then work their way down to lower leaves and the fruit or vegetable...
Three technical replicates and one to five biological replicates (representing different leaves from the same tree, based on leaf availability) were analyzed for each genotype. Data were analyzed using FCS Express 4 (Research Edition 2011; De Novo Software, Los Angeles, CA, USA). The T. cacao...