What are These Small, Green Worms Hanging Off My Trees?


In the spring and fall, we often get calls about small, green worms or caterpillars hanging on web-like threads from trees and structures. While they may be off-putting, and can be rampant some years, they should not be a cause of serious concern.

So, What are They?

While there are many similar-looking small caterpillars and worms, the variety most commonly seen in North Texas is the cankerworm. These inchworm-like caterpillars are the larvae of moths, usually the hackberry leafroller moth (Sciota celtidella). While the leafroller caterpillars usually emerge in the spring, depending on the weather they can also be active in the fall. The caterpillars spin thin strands of web-like filament that they use to move from tree to tree and to aid in feeding.

Should I be Worried?

While the hackberry leafroller can cause defoliation, there is little cause for concern. Healthy trees in good soil can withstand extensive defoliation. While trees that are under stress may suffer more from unseasonal leaf loss, hackberries are hardy, native trees in North Texas and will likely recover during the next growing season. In areas of high activity, the ground may be temporarily discolored, but this should clear up after the next heavy rain.

All About Hackberries

Hackberry trees are a common sight in DFW, and have even lent their name to several areas and neighborhoods! What we call hackberries may be of a few distinct tree species, but are all in the genus Celtis. Hackberries are fast-growing softwood trees that can often be found as volunteers along fences and hedgerows, grown from seeds dropped by birds and other animals that feed on the trees’ berries. Because of their fast growth and structure, and because they are often overlooked, hackberries can be prone to limb and trunk instabilities. One particular danger is root rot caused by the Kretschmaria deusta fungus.

Should I Do Anything?

Unfortunately, once the caterpillars emerge and begin feeding there are no effective insecticidal treatments. Using a water hose or other method to remove caterpillars from trees and structures can help some, but it is important to make sure that the removed caterpillars are disposed of so that they don’t simply re-infest the tree. Proper maintenance, especially of stressed trees, is usually all that is needed to ensure a hackberry recover from leaf rollers. Water correctly and avoid high-nitrogen fertilizers, opting instead for organic soil amendments to improve the tree’s microenvironment. As the population of leafroller caterpillars varies from year to year depending on environmental and other factors, preventative treatment is usually not recommended, due to low success rate and risk of over-usage of insecticidal chemicals.

At Texas Tree Surgeons, we love trees and we love our community! While it’s always a little startling to see unseasonal leaf drop, losing leaves doesn’t necessarily mean a tree is doomed! We are always happy to have one of our ISA Certified Arborists out to look at your hackberries (or any other trees) and let you know if what you are seeing needs to be addressed. Get in touch today!

What’s Wrong With All These Trees?

Just as with extreme winter weather, intense summer heat and lack of rainfall can create stressful and dangerous situations for trees. The drought conditions we endured for the summer of 2022 dried out area lakes and rivers and dramatically reduced the available moisture in the soil.

According to the Texas A&M Forest Service, over 3 million trees died as a result of the widespread drought of 2011. While some of the data shows that the 2022 drought was less severe than 2011, many areas of the state have actually had less rainfall and more 100-degree days than in the comparable period 11 years ago. Additionally, many trees affected in the 2022 drought were still suffering the effects of the freezing weather in 2021.

How Does Drought Affect Trees?

The effects of drought cannot be overstated.

  • In addition to potentially facing long periods and high temperatures, trees in drought areas:

    • Can lose their ability to take up nutrients from the soil

      • When ground temperatures rise as high as they did this summer, the soil dries out and the fine, nutrient-absorbing roots of a tree found close to the surface die.

    • Have to rely on limited energy stores instead of outside nutrition

      • This leaves energy stores depleted, leading to further decline after their dormant season.

    • Are unable to immediately take up much-needed moisture once it returns

      • Moisture-absorbing riot structures take time to regrow in dehydrated soil.

    • Find their microenvironment greatly altered

      • Beneficial microorganisms, just like fine tree roots, cannot live in dried out, hard ground.

What Can You Do to Help Your Trees Right Now?

  • WATER, WATER, WATER

    • Even though we have had some rain recently, it is not enough to help trees come back from extended drought. Proper watering now will make a big difference!

  • Apply appropriate soil amendments and compost/natural fertilizers

    • Nutrient-rich material, such as compost or soil amendments, bring much-needed micronutrients to bolster soil revitalization.

    • As a response to the drought stress, Texas Tree Surgeons will be using a nutrient-rich fertilizer mix that contains beneficial rhizosphere bacteria, seaweed and yucca extracts, urea and humic acids, as well as fish meal, kelp meal, worm tea, and sea water extracts for fall 2022 applications. This blend of natural micronutrient sources will benefit not only the trees, but the soil ecosystem, and allow beneficial microorganisms to thrive.

  • Use mulch in the trees’ root zones to help regulate soil temperature and moisture content

    • Proper mulching leads to better soil, as the mulch decomposes into nutritious organic matter.

  • For stressed trees, only remove dead or broken areas and do light maintenance trimming

    • Wait until the trees have had another growing season before considering major work.

    • Drought can lead to more dry and dead limbs; be sure to remove those before they come down in fall and winter storms.

  • If you need to replace trees or other landscaping that didn’t make it, fall and winter are the best times to plant

What Should Be Avoided After a Drought?

  • ABSOLUTELY DO NOT USE HIGH-NITROGEN FERTILIZER OR “WEED AND FEED” PRODUCTS!

    • Using a high-nitrogen fertilizer can stimulate fast and unsustainable growth that is a waste of the already-taxed energy stores of stressed trees.

    • “Weed and feed” products are formulated to kill woody-stemmed plants (like trees!). Using these chemicals adds a further stressor to the tree’s environment.

  • Do not install new sod or artificial turf

    • Putting sod or synthetic turf around a stressed tree will prevent the regrowth of the tree’s fine root systems.

  • Do not rely on sprinkler systems or lawn irrigation to water your trees

  • Do not over- or improperly trim your trees

    • Lion tailing, topping, and removing large sections of canopy are always a bad idea, but improper trimming can lead to a stressed tree dying completely.

 

At Texas Tree Surgeons, we love trees and we love our community! We hope your trees made it through the summer of 2022, but even trees that seem unaffected need particular attention and care in the coming months and years. Proper watering is key, but drought-stressed trees and soil need additional help this fall and in the seasons to come. Our ISA Certified Arborists can assess your trees’ needs and recommend a well-tailored plan of soil amendments and healthy trimming to make your trees thrive all year long. Get in touch today!

Chupik Tree Service is Now Part of the Texas Tree Surgeons Family!

At Texas Tree Surgeons, we pride ourselves on providing the best in tree care and customer service. While we have grown considerably since Amy Langbein Heath took over in 2011, we strive to maintain the small business feel that our long-time customers have come to expect from our arborists, crews, and office staff.

In July 2022, we were happy to bring on Kay Chupik and her company Chupik Tree Service to continue to bring superior tree care to East Dallas and beyond.

Chupik Tree Service was started in 1987 by Stanley Chupik. Stan and Kay ran Chupik Tree Service as a family business and became well known in the Lakewood area of Dallas for providing top-quality tree trimming with a hands-on and personal approach. Following Stan’s passing in 2017, Kay continued to run Chupik Tree Service herself, not just providing estimates but also helping out on the tree crews!

In early 2022, through mutual friends at the Eagle Postal Center in Lakewood, Kay reached out to Amy to discuss some issues she was having in keeping up with the demands of running her small tree company. Ultimately, Amy and Kay decided that customers would be best served by Chupik Tree Services becoming part of Texas Tree Surgeons. This way, the relationships Kay had fostered in the community could continue to receive her personal attention, while Texas Tree Surgeons could provide Kay’s customers with the quality of tree service they had come to expect.

In recognition of the history and expertise that Kay brings to our Texas Tree Surgeon family, she will continue to give estimates and tend to the tree work needs of her long-time clients under the name “TTS Chupik Tree Service.” We are happy to debut a new version of our logo for the services Kay offers, one which combines our strong TTS branding with the familiar Chupik name.

As Texas Tree Surgeons and Chupik Tree Service move into this new era, we are excited to see how we can continue to grow in our commitment to loving trees and loving our community.

Want to reach out to Kay Chupik or any of our arborists? Send us a message!

Why Can’t I Grow Grass Under My Tree?

One of the perennial questions our arborists hear from customers is how to get more grass to grow under their trees. Whether it is from canopy shade or root growth, there seems to be a constant struggle between grass and trees. Unfortunately, most turf grass is not bred to live in harmony with large trees, and trees often find themselves in competition for resources with surrounding grass. In many cases, homeowners have to choose between uniform turf coverage and tree health.

Why Does Grass Not Grow Under Trees?

Simply put, turf grass and trees do not come from the same natural environment.

Turf grass is bred and grown to thrive in bright sun with regular watering. The root systems of sod grasses form heavy thatch that captures moisture and nutrients and reduces competition from weeds and other plants in the same area. Turf needs relatively shallow soil, as its roots are close to the surface.

Trees, on the other hand, are most at home in a forest environment. Rather than being surrounded by grass, trees in a forest cover the ground around themselves with dropped leaves or needles (yes, evergreens have a “leaf exchange” too!). This “leaf litter” acts as natural mulch and breaks down into compost, creating layers of rich soil providing both nutrients and stability to trees. This natural mulch and compost also prevents the growth of potentially-competing plants. Additionally, while the trees’ canopies need bright sun, the root zone is kept shaded, both to aid in the breakdown of the leaf litter and help prevent other plants from growing.

Turf Grass And Trees Do Not Get Along

In an urban environment, turf grass and trees are artificially united in a single ecosystem. The trees’ natural growth process and self-mulching is often altered, as leaf litter is removed by homeowners. As turf grass tries to expand into a tree’s root zone, it encounters shade and surface roots, both of which are not conducive to growth. Where trees and turf grass coexist, they often compete for resources, especially water. Lawn sprinklers and irrigation systems provide enough water for grass, but are not able to properly water trees. Synthetic fertilizers for turf grass (especially “weed and feed” products) can actually be harmful to trees.

Luckily, there are alternatives to this unhealthy cycle of competition!

What Can I Do About Grass Not Growing Under My Trees?

In an ideal world, all trees would be able to live in their preferred environment: surrounded by a large area of mulch and compost, properly irrigated, and not in competition with other plants for resources. Proper mulching around your trees will not only help the trees grow, but the mulch will regulate soil moisture and temperature, making trees more resistant to temperature shifts or periods of drought. While it may be hard to imagine a yard without grass, proper mulching around your trees and reducing the amount of turf grass brings a natural beauty and can save on water usage dramatically.

If you still want some color under your trees, rather than the natural soil, there are some ground cover options that can brighten up your yard without causing undue competition with your trees. Native grasses and groundcover that have evolved or been bred to complement the needs of trees are a great choice to reduce water usage, add beneficial nutrients to the soil, and attract native pollinators. For more information, and some specific recommendations, check out this post from our friends at Native Gardeners.

Can’t I Just Trim My Tree So That Grass Will Grow?

While it is possible to trim a tree’s canopy to increase the amount of light that reaches the ground below, and trees need a certain amount of thinning for air circulation, this is not a long-term solution, and too much thinning can lead to tree decline and death. Trees produce food and energy in their leaves, and removing leaves leads to one of two things: if a tree is healthy, it will simply grow more leaves to replace the ones lost; or, if a tree is already stressed, it will not have the energy to put out new leaves and will begging to suffer from lack of proper nutrition. For healthy trees, industry standards dictate removing no more than 25% of living canopy per year. For stressed or older trees, the acceptable percentage is even smaller. “Lion tailing” a tree (removing a majority of interior growth, leaving only small areas of canopy at the end of branches) is never an acceptable practice. If you are considering thinning your trees for light transmission, be sure to consult an ISA Certified Arborist to evaluate your trees’ health and provide guidelines for healthy trimming.

Why Does My Neighbor Have Grass Under Their Tree When I Don’t?

As with many tree questions, determining why one tree or yard seems to grow differently from another can be difficult. There are several factors that can determine how trees and turf grass will interact, including:

  • Tree species and age

  • Turf grass variety

  • Direction and amount of daily sun

  • Presence of other landscaping (shrubs, flower beds, etc.)

  • Micro-environmental factors (soil condition, use of fertilizer/chemicals)

Ultimately, it is up to the homeowner to choose to focus on turf grass health or tree health. Unfortunately, it is difficult to get both types of landscaping to cooperate and thrive. Before investing in costly sod installation or other landscaping, be sure to understand how grass, trees, and other plants will interact with and affect each other.

At Texas Tree Surgeons, we love trees and we love our community! While we are inveterate tree huggers and may be a little biased, it is still true that properly-cared-for trees do more to capture atmospheric carbon, reduce urban heat islands, curtail excessive water usage, and provide mental and physical health benefits. We understand it can be heard to break away from social pressure to have an immaculate, green lawn, but homeowners who have moved toward native and natural landscaping are often amazed to see how easy, beautiful, and inexpensive their trees and gardens can be. We are always happy to talk about how to organize your yard around native trees for a look that is beautiful, unique, and low-maintenance. Let us know how we can help!

Are Trees Still Showing Signs of Freeze Damage? [May 2022 UPDATE]

Unfortunately for trees in North Texas, the effects of the February 2021 winter storm, often called “Winter Storm Uri” in the media, are still with us. The historically-low temperatures and winter precipitation in 2021 and the winter weather in February 2022 had a devastating impact on the health of trees and other vegetation and  recovery from those extreme conditions will take time. Common landscape trees in the DFW area, such as ash, live oaks, red oaks, wax myrtles, chinaberries, and Chinese tallow trees were some of the worst damaged by the freezing conditions and so the damage can still be seen in many parts of our community.

Different species and types of trees responded differently to the low temperatures.
Visit our previous posts for specific info:

My Tree Leafed Out in Spring 2022 but is Now Turning Brown. Is That Freeze Damage?

Due to the unprecedented nature of the winter weather in 2021 and 2022, it has been difficult to predict exactly how trees will respond and the nature and timing of any freeze-related decline.

  • Some species have seemed to bounce back from freeze damage only to show browning and die back after two or more growing seasons.

    • Red oaks and Japanese maples have been observed to leaf out in the spring as normal, only to start browning a few weeks later.

    • Unfortunately, once a tree’s canopy has completely browned or died, the tree may not be salvageable.

  • If a tree has partial browning or only some dead canopy:

    • Prune out the dead or dying sections

    • Follow good watering practices

    • Use soil amendments focused on increasing available nutrients

      • High nitrogen fertilizer is NOT recommended, as this can stimulate the tree to use up energy reserves to push new growth rather than increase overall health

A tree exhibiting severe freeze-thaw cracks. Even less drastic cracking can reduce a tree’s defenses against pests.

Should I Be Worried About Cracks in the Bark of My Trees?

Freeze-thaw cracks occur when rapid temperature swings cause the wood of a tree to swell and contract faster than normal. These cracks vary in size and severity. When the water inside a tree freezes, it can damage the tree’s vascular system, which moves nutrients throughout the entire tree. Widespread damage to the vascular system can lead to tree death.

Trees with freeze-thaw cracks need special care to encourage vascular system growth and nutrient availability.

  • Proper watering is essential.

  • Soil amendments and low nitrogen fertilizers can make additional nutrients readily accessible to the tree’s roots.

    • Fertilizing stressed and damaged trees must be done with care.

    • High nitrogen growth stimulators should be avoided.

  • Preventive insect treatment is recommended.

    • Cracks or other wounds in the bark are entry points for borer beetles and other pests.

    • Over time, the tree will be able to seal off (“compartmentalize”) the damaged sections, but this can be a slow process.

Why Does My Tree Have Large Dead Branches?

In cases where only parts of a tree were subject to severe frost damage, the main trunk may be free of freeze-thaw cracks or other issues while some large or small sections of the tree show browning and dieback. With rapid temperature swings and violent winter weather, a tree’s specific location and surroundings (such as nearby structures or other trees) can have a great impact on how the tree is affected. Because of this, trees of the same species on the same block may have shown wildly different responses to freezing weather. No matter the extent, it is best to remove dead and dying sections of the canopy and bolster the tree’s health with water and nutrients to give it the best chance to compartmentalize the dead and decayed sections and return to health.

At Texas Tree Surgeons, we love trees and we love our community! Recent extreme weather events present new challenges to our urban forest and it will likely be a few years before we have seen the full effects. Trees, by their nature, respond slowly to environmental changes and, if not properly cared for, can slide into a cycle of decline following storm damage or other severe weather. As we move into the heat of the summer our current drought conditions can worsen and accelerate tree decline and dieback. Now is the time to have one of our arborists evaluate your trees for their current needs and prescribe a health care plan to increase soil nutrient levels and manage insect activity. Contact us today!

How To Care For Trees During a Drought

With over 90% of Texas in drought conditions, water conservation measures are in effect over much of the state. Caring for our urban forest during a drought requires special attention to our watering practices to ensure that trees get the water they need and none is wasted.

Do I Really Need To Water My Trees? I Have a Sprinkler System!

Yes! Even if you have a sprinkler system or regularly water your lawn, you need to water your trees as well.

  • In-ground irrigation systems and hose-attached sprinklers are designed to provide water for turf grass and other ground cover.

    • Some sprinklers may be able to provide more water for small shrubs and bushes, but none of them are adequate to meet a mature tree’s water needs.

  • If a tree is not properly mulched, it may be in competition for water resources with other plants.

    • If there is artificial grass present, water and nutrients in the soil may be scarce.

  • Without adequate water, trees’ immune systems weaken, leading to increased susceptibility to disease and insects.

    • Repeated, long-term stress from lack of water can lead to a cycle of decline and tree death.

What is the Best Way to Water My Trees?

There are two main ways to get sufficient water to your trees: using a soaker hose or hand watering.

  • Soaker Hose

    • Recommended for ease of use and coverage

    • Make sure the hose can cover the entire root zone

      • Depending on the type, hoses can be arranged in circles or a spiral around the tree or in radial lines leading out from the trunk

    • Run the soaker hose long enough to wet the ground in the root area to a depth of 10-12 inches

    • Check the soil to see how long it retains moisture and only water after the soil has dried

      • Too much water can be as bad as too little

      • Generally, watering should be every 7-10 days

  • Hand Watering

    • Place a garden hose so that the outlet is 1-2 feet from the root flare of the tree

    • Turn on water enough to spread, but not so much that it puddles or streams away

    • Move hose around tree to ensure even watering of entire canopy area

    • As with soaker hoses, stop watering when soil is damp to a depth of 10-12 inches

    • Wait a few days and check soil moisture

      • Re-water when soil is dry to avoid excess dampness

  • Special Considerations

    • Some trees may require watering more often

      • Stressed/sick trees (such as by freeze damage or pest activity)

      • Non-native species

      • Recently-planted trees

    • During periods of wet weather, do not water too often

      • Excess soil moisture can cause rapid growth of harmful microorganisms

How Can I Help My Trees Retain Moisture in a Drought?

After watering, mulching is the most effective way to regulate tree moisture. Proper mulching helps regulate soil temperature, slows evaporation, and contributes to soil nutrients as it breaks down.

Avoid high nitrogen fertilizers and growth stimulators, as these can cause a tree to use up energy stores and require more water to maintain. Organic soil amendments and compost can be added to soil and mulch if needed.

At Texas Tree Surgeons, we love trees and we love our community! While the summer months can be fun, the drought conditions they often bring can be stressful to people and plants. Proper watering of our urban forest leads to healthy trees that can help regulate heat, provide shade, and keep the air fresh. Have questions about how best to care for your trees during drought? Contact us today!