Pest Boom in Stressed Trees
As a Certified Arborist working in Colorado, I want homeowners to understand something important. What we’re experiencing with this weather is not just a nuisance issue. It’s the greater canopy issue. We’re about to experience a pest boom in our already stressed trees.
Weather + Stress trees = Pest Explosion
Our recent weather patterns such prolonged heat, inconsistent rainfall, drying winds, and periods of drought stress are creating ideal breeding conditions for many destructive tree, shrub and lawn pests. When temperatures rise and moisture is limited, certain insect populations accelerate their life cycles. That means more generations per season… and higher numbers overall. For instance, Japanese beetle larvae overwinter in the soil and depend on adequate moisture to survive. According to Colorado State University Extension, dry soil conditions can increase grub mortality because they are more susceptible to desiccation in parched soils. However, that doesn’t guarantee relief. Grubs can burrow deeper in search of moisture, and in irrigated landscapes and survival rates often remain high despite winter drought.
In a “normal” year, pest populations are often manageable. With proper monitoring and timely treatments, we can typically keep pressure at a level most healthy trees can tolerate. This year is shaping up differently.
When trees don’t receive adequate water, they become stressed. And stressed trees lose their natural defensive capabilities. They produce fewer defensive compounds. They don’t compartmentalize damage as effectively. They cannot outgrow feeding injury. To a pest population, that’s an open invitation.
High Populations Can Overwhelm Trees
Insects don’t kill a tree overnight to cause irreversible damage. Repeated feeding, boring, sap-sucking, or defoliation weakens a tree incrementally. When populations spike, that feeding pressure multiplies.
We may see:
- Increased borer activity in ash and ornamental trees
- Heavy aphid, scale, or mite infestations
- Defoliation from caterpillars and beetles
- Disease caused by feeding wounds
Healthy trees can often tolerate moderate insect pressure. But high pest populations can defeat stressed trees. And once decline begins, recovery becomes difficult and expensive. By the time homeowners notice thinning canopies, premature leaf drop, dieback, or excessive sap flow, the tree has already been under attack for weeks or months.
Be Proactive with a Customized PHC Program
The good news? We are not powerless. Autumn Tree Lawn and Landscape’s Plant Health Care (PHC) programs are designed specifically to address these concerns.
The key is proactive management. Once pest populations explode, control becomes more difficult and trees experience more damage before recovery can begin. With Autumn Tree, our goal is simple: protect your canopy before stress and insects take over. If your trees have experienced heat stress, inconsistent watering, or previous insect pressure, this is the year to be proactive not reactive.
A thriving canopy doesn’t happen by accident. It happens with a plan. Let’s protect your trees before pest pressure peaks.