Bartlett’s Tree Topics Blog

Tiny Mites, Big Damage

Mites are minute, plant-feeding arachnids that feed on chlorophyll, the pigment that gives plants their lovely green color. By removing chlorophyll, mites can cause plant foliage to appear bleached or bronzed. Because mites reproduce rapidly, damage to healthy foliage can occur within a relatively short period.

Spider Mite Webbing with hundreds of spider mites  e1560968347673 - Tiny Mites, Big Damage

Webbing with hundreds of spider mites.

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Posted in Pests and Diseases

Aphids: Small in Size, Many in Number

Aphids are small, sap-sucking insects. Some of them feed on more than one type of plant— for example, apple grass aphids feed on young new leaves and blossoms of apples until the beginning of summer when they migrate to oats, grasses and reeds for the rest of the season. Others feed on just one food source, like the lime leaf aphid, which feeds only on limes. Many different species exist, impacting a huge range of broad-leaf trees and shrubs.

Aphids Aphids reproduce asexually and their populations can grow quickly to an unmanageable size  e1560964606799 - Aphids: Small in Size, Many in Number

Aphids reproduce asexually and their populations can grow quickly to an unmanageable size.

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Posted in Pests and Diseases

Oystershell Scale: An Unusual Insect Pest

Oystershell scale (Lepidosaphes ulmi) belongs to a group of insects called the armored scales. The “armor,” is produced by a waxy secretion combined with the insect’s own body cast during each molt. This protective outer layer helps shield the oystershell scale from natural predators.

Oystershell Scale Slide and Blog Image e1560971812643 - Oystershell Scale: An Unusual Insect Pest

Oystershell scale

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Posted in Pests and Diseases

Decline in Spruce Trees

Over the past decade, spruce trees have suffered an abundance of issues. All species of spruce, including Colorado blue and white spruce, are being affected, but particularly concerning is the prevalence of ‘decline’ symptoms on well-established Norway spruce. Originally a favorite due to the relatively low incidence of health issues, the Norway spruce is now experiencing serious health concerns. Environmental factors such as drought stress, elevated summer temperatures, and wetter growing seasons have played a significant role in twig dieback and needle defoliation.

Spruce Norway spruce are now experiencing serious health concerns e1560967527182 - Decline in Spruce Trees

Norway spruce are now experiencing serious health concerns.

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Posted in Environmental Issues, Pests and Diseases

Ivy on Trees is a Concern

Although long used as a groundcover, ivy is harmful for trees. It is not indigenous, and many species are aggressively invasive and displace native species. In North America, the most common culprits are English ivy (Hedera helix) and Irish, or Atlantic, ivy (Hedera hibernica). Tree health and safety are the major concerns regarding ivy for arborists.

Ivy can reduce tree stability and lead to failure for a number of reasons. Structural or flare roots are one of the most important areas of a tree to inspect. If this area is obscured by ivy, the arborist cannot conduct a proper risk assessment of the tree, and critical information about tree stability cannot be determined. Another concern is that ivy adds considerable weight and wind resistance in a tree canopy. Because ivy is evergreen, trees that would normally be bare during winter suffer extra stress from rain and wind.

Ivy Ivy can add considerable weight and wind resistance in the canopy e1560970089209 - Ivy on Trees is a Concern

Ivy can add considerable weight and wind resistance in the canopy.

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Posted in Environmental Issues, Tree Advice
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Being a leader in the tree care industry means continually focusing on learning and innovation. Bartlett’s Tree Topics blog follows in that tradition by offering a place to receive advice on trees, tree pests, tree preservation, and more.

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