An Integrated Approach

Bartlett Tree Experts uses an integrated approach to managing insects and diseases that begins with maintaining plant health using sound cultural practices including pruning and creating optimal soil conditions for plant growth. Periodic inspections are essential to detect pest infestations before they reach damaging levels. Bartlett arborists are trained to recognize beneficial insects that will help naturally suppress pest populations, and we also release beneficials to augment existing populations. When treatments are necessary, Bartlett can apply organic and naturally based materials and reduced-risk products that provide effective pest suppression while protecting people and the environment.

Top-10 Insects

Hundreds of insect species damage leaves, stems, and branches; roots; and flowers and fruit of landscape plants. But not all insects on trees and shrubs are damaging. Some are beneficial and may help pollinate flowers or could be predators or parasites on insects that damage plants. Bartlett arborists are trained to correctly identify these beneficial insects and mites and can devise effective management programmes that protect landscape plants from serious damage while conserving beneficial organisms.

Top ten insect and arthropod pests that threaten or damage landscape plants in Great Britain and Ireland:

  1. Aphids and Whiteflies
  2. Woolly Aphids
  3. Brown-Tail Moth
  4. Conifer Shoot Miner
  5. Horse Chestnut Leaf Miner
  6. Flea Beetles
  7. Leafhoppers
  8. Oak Processionary Moth
  9. Spider Mites
  10. Scale Insects
Top-10 Diseases

Diseases are abnormalities in trees and shrubs caused by microorganisms such as fungi and bacteria and by environmental stress such as drought, temperature extremes, and air pollution. Diseases are often difficult to diagnosis as different causal agents can produce similar symptoms. Accurate diagnosis is essential to developing effective treatment programmes. Bartlett operates a modern diagnostic laboratory to support pest management services to ensure accurate identification and treatment of plant problems.

Top ten diseases that threaten or damage landscape plants in Great Britain and Ireland:

  1. Phytophthora Root Rot
  2. Bacterial Bleeding Canker
  3. Chalara Ash Dieback
  4. Apple Scab
  5. Anthracnose
  6. Leaf Blotch
  7. Fire Blight
  8. Massaria (London Plane)
  9. Honey Fungus
  10. Powdery Mildew

Horse Chestnut Leaf Miner

Horse Chestnut Leaf Miner

A widespread, damaging pest of horse chestnut, the larvae tunnel into leaves resulting in brown patches on the leaf surface.

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Oak processionary moth

Oak Processionary Moth

This defoliating pest is found in many boroughs of London. Contact with OPM caterpillars can result in health issues so removal is always recommended.

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Ash dieback

Ash Dieback

Chalara ash dieback is caused by a fungus that results in premature leaf loss and crown dieback in ash trees.

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