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Insect & Disease Management

Insect & Disease Management

Hendel's Tree Care & Landscaping 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. Please review our Plant Care Calendar for optimal times of year to address various plant health issues.

Hendel 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, we can apply organic and natural-based materials and reduced-risk products that provide effective pest suppression while protecting people and the environment.


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 programs that protect landscape plants from serious damage while conserving beneficial organisms.

Top ten insect and arthropod pests that threaten or damage landscape plants in the midwestern United States:

  1. Emerald ash borer
  2. Gypsy moth
  3. Cankerworm
  4. Bark beetles
  5. Tent caterpillars
  6. Flat-headed borers including bronze birch borer, and two-lined chestnut borer
  7. Weevils
  8. Spider mites
  9. Scale insects
  10. Aphids


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 programs. 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 the midwestern United States:

  1. Oak wilt
  2. Phytophthora root rot
  3. Dutch elm disease
  4. Wood decay
  5. Anthracnose
  6. Needlecast
  7. Verticillium wilt
  8. Pinewood nematode
  9. Iron and manganese chlorosis
  10. Drought