Insect & Disease Management

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Early identification and treatment of pests and disease is far more effective than waiting until problems become severe.

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An Ounce of Prevention ...

The Fairfield and New Haven County area of Connecticut is a hot spot for several highly destructive tree diseases and insect pests, including Emerald Ash Borer (EAB). Plus, we have the usual problems with hemlocks and boxwoods, and the all-too-familiar summer defoliation of fruit trees (like your crabapple that's leafless by the time summer rolls around).

While it's always best to prevent tree problems when possible, there are situations where the problem is acute and needs immediate treatment.

See our Insect & Disease FAQs for more details >>

What Do Your Trees Need?

Disease & Pest Control

Trees can get sick, just like we do. The key to effective treatment is to quickly identify the cause (often, it's an insect pest or a tree-infecting disease) and then administer the appropriate "medicine." Our Tree Health Care Manager will choose the best option to control or eliminate the pest or disease, while ensuring that the treatment has as little impact as possible on other plants or living creatures (such as pollinators and beneficial insects). We'll also recommend ways to prevent the problem from recurring.

Systemic Insecticide Applications

Whenever possible, we prefer to use insecticides that are injected directly into the tree or into the soil around the tree. This avoids the potential for spraying non-target trees and plants, and means that your property is safe to be on immediately after treatment. The injected pesticide is carried throughout the tree where it can be ingested by any pests eating the tree's tissues.

Horticultural Oil Treatments

Prevention is key when it comes to tree pests. Horticultural oil applications are a safe, effective way to prevent and control many common tree problems, such as hemlock wooly adelgid. Not only can this save you time and money, but it can also save you from having to use stronger and more costly pesticides to control an infestation later in the season.

Fungicide Applications

Fungicides are applied in spring and are used to prevent or control common fungal diseases, such as apple scab, anthracnose, powdery mildew, and rust. Typically, 2 to 3 treatments are needed for good control. Popular trees and shrubs that are susceptible to fungal infections include crab apples, pears, hawthorns, and dogwoods, among others.

Highly Targeted Treatments

Each damaging insect, tree pest or disease is targeted with a treatment that's specifically chosen to affect as few other insects, animals or plants as possible. Pesticides are only used when needed and broadcast spraying of non-specific insecticides is avoided if at all possible.

We use this environmentally-sensitive approach because it provides more effective results with less need for harmful chemicals. Plus, it's safer for people, pets, and the environment.

Schedule an Assessment Today

Regardless of the time of year, it's never too late (or too early!) to schedule a property assessment. Because pests and diseases appear at different times throughout the year, it's wise to understand which of your trees are at risk and develop a plan to pre-emptively deal with any issues.

What to Expect

The timing of each application is carefully scheduled for the time in the insect's life cycle or the disease's progression when it's most vulnerable or susceptible to treatment.

This means there are specific times of year when a treatment can - and cannot - be applied. We'll let you know if a treatment window has passed and how to get on the schedule for the next treatment opportunity.

We recommend regular monitoring to catch early signs of increasing pest populations and changes in environmental conditions that signal an upcoming disease outbreak.

Connecticut Insect & Disease FAQs for Trees

A Tree Health Care Program (sometimes referred to as a PHC or a Plant Health Care program) is a comprehensive program that will identify, prevent, manage, and treat any issues with your trees. 

It typically includes a wide range of tree care services such as fertilization, pest control, disease control, identifying tree issues, and more. 

Trees can get sick, just like we do. The key to effective treatment is to quickly identify the cause (often, it's an insect pest, a tree-infecting disease, or environmental factors) and then administer the appropriate "medicine."

Our Tree Health Care Manager will choose the best option to control or eliminate the pest or disease while ensuring that the treatment has as little impact as possible on other plants or living creatures (such as pollinators and beneficial insects). We'll also recommend ways to prevent the problem from recurring.

For some pests, there are commercially-available treatments that may be helpful. 

But many of the most effective treatments can only be applied by professionally licensed arborists or pesticide applicators. 

Knowledge of the treatments and how they can impact the rest of your property and environment are important parts of tree health care. It can be easy to apply something incorrectly or to accidentally use something that could be toxic to local pollinators or other wildlife (not to mention nearby plants!). 

Many of our treatments are injections, which means that the treatments go directly to the source of the problem without disrupting the local ecosystem. Others are sprays that require a professional, high-powered spray rig to reach all parts of the tree. 

Rather than risking your tree's health with the wrong treatment, an ineffective treatment, or a treatment applied at the wrong time or in the wrong way, just give us a call. We'll be happy to set up a professional tree health consultation so you'll know exactly what's wrong and will have a professional treatment plan. 

The effectiveness of insect, pest, and disease treatments depends on the tree or shrub, the pest or disease, and a few other factors. 

Many issues can only be treated before the pest or disease appears. The Arborists at Rayzor's Edge understand when specific insects, fungi, and bacterial infections are likely to appear and when to take the necessary preventive measures.

Other pests or diseases may need to be treated several times a year, often during different stages of the insect's development or the disease's progression.

Some issues are treated once they appear.

And, of course, the proper timing of treatments is often weather-dependent.

This varied timing is one of the reasons why a good Tree Health Care program is so important - regular monitoring will help identify the right time to apply treatments for the greatest effectiveness.

The Spotted Lanternfly is an invasive and destructive pest that kills trees and crops. 

The insect itself is a nuisance and is causing issues across the Eastern U.S. 

Read our FAQs on the SLF in Connecticut, include what to do if you see any spotted lanternflies near you >>

Although the SLF’s preferred tree is the weedy, invasive Tree of Heaven (Ailanthus altissima), the insect also attacks valuable tree species, including fruit and nut trees and almost 50% of Connecticut’s forest trees.

Forest tree species attacked by SLF include:

  • Red maple (Acer rubrum)
  • Sweet birch (Betula lenta)
  • Sugar maple (Acer saccharum)
  • American beech (Fagus grandifolia)
  • Eastern hemlock (Tsuga canadensis)
  • Eastern white pine (Pinus strobus)
  • Northern red oak (Quercus rubra)
  • American hornbeam (Carpinus betulus)
  • Yellow Birch (Betula alleghaniensis or B. lutea)
  • White oak (Quercus alba)

If your evergreen shrubs, such as arborvitae and juniper, are showing these signs, they may be infected with a pest that's common across Connecticut - bagworms. 

How to identify, prevent, and treat bagworms >>

Beech Leaf Disease is spreading rapidly throughout Connecticut, putting all of our beech trees at risk. This fatal disease is relatively new to the state and there’s a lot scientists still don’t know about its cause and how it spreads. However, there are things Connecticut residents can do to help control it, starting with the beech trees on their own property.

Read more about Beech Leaf Disease in Connecticut >>

Yes!

Look for these eight common symptoms that mean your tree is suffering from pests, disease, or environmental stress and learn what to do about it.

Why Trust Your Trees' Health to Rayzor's Edge?

Accredited by the Tree Care Industry Association

Tree Care Safety Professionals on staff

Connecticut Licensed Arborists

Fully insured specifically for tree work

Not sure what's wrong with your trees?

Why not book a tree inspection by one of our Arborists? We'll examine your trees and landscape, identify any issues, and let you know what (if anything) we recommend to keep your trees in optimimal health.

I have used Rayzors Edge for tree removal, tree trimming, firewood and spraying my trees with insecticide to keep them healthy. They saved my favorite tree. Thank you Cassandra!

Carl A.

Trees being damaged by insects or disease?
Get in touch!