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TNLA is thrilled to introduce our new "Working for You" Blog!
Stay updated on member events and news that impact the TNLA community. In addition, check out our Green Matters Weekly Newsletter for industry news |
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During the last legislative session, TNLA worked to solve a challenge our industry has dealt with for years: getting timely information when new pests, diseases, or quarantines impact Texas. Working alongside Representative Mihaela Plesa and Senator Lois Kolkhorst, TNLA passed legislation creating a statewide pest, disease, and quarantine e-mail alert system. That system is now officially live. 👉 You can sign up for the email alert system here: https://agalert.tamu.edu/ Why This MattersWhen a dangerous pest or disease is identified or when a quarantine is put in place, our industry needs to know quickly. Growers, retailers, and landscape professionals need accurate information to make decisions and respond. HB 1592 helps address that challenge. The new system: • Is operated through Texas A&M AgriLife Extension • Provides email notifications for:
How TNLA Got This Done TNLA heard concerns from members about the need for better communication during plant health events. During the last Sunset Review of the Texas Department of Agriculture, TNLA identified and supported the conclusion that timely, accurate information was critical for our industry regarding quarantines, quarantine updates, pest and disease detection, and measures to contain them. Understanding the need for better communication needed a legislative solution, we brought those concerns to lawmakers and worked with legislators, state agencies, and stakeholders. The result was this brand-new email-based pest alert. TNLA helped move this bill from an industry idea, through the legislative process, and ultimately into a resource that is now available statewide. What You Should Do NowThis tool only works if industry members sign up and use it.
Take a few minutes to: • Select your county (or multiple counties where you operate) • Receive alerts for your area • Stay informed about potential threats 👉 Sign up today: https://agalert.tamu.edu/ Your support allows TNLA to continue protecting and strengthening our industry.
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One of the most common complaints from homeowners during the growing season is the appearance of a black, soot-like coating on leaves, stems, patios, vehicles, and outdoor furniture beneath landscape plants. While many assume this black growth is a plant disease, the real culprit is often an insect infestation. Sooty mold is a fungal growth that develops on honeydew, a sticky, sugar-rich waste product excreted by sap-feeding insects. Common honeydew-producing pests in Texas landscapes include aphids, whiteflies, scales, mealybugs, and psyllids. As these insects feed on plant sap, they remove more sugar than they can utilize and excrete the excess as honeydew. Sooty mold fungi then colonize this sticky residue, forming a dark coating on plant surfaces. The mold itself does not infect plant tissues or directly damage leaves. However, heavy accumulations can block sunlight and reduce photosynthesis, leading to decreased plant vigor and aesthetic quality. In severe cases, leaves may yellow, growth may slow, and plants can become stressed, particularly when combined with other environmental challenges. Several landscape plants are commonly affected by sooty mold in Texas, including crape myrtle, gardenia, holly, hibiscus, magnolia, citrus, and many ornamental trees and shrubs. Crape myrtle bark scale, for example, is a frequent cause of heavy honeydew production and subsequent sooty mold development on crape myrtles. Likewise, whiteflies and aphids often contribute to outbreaks on ornamentals and flowering plants. Successful management requires addressing the underlying insect problem rather than focusing solely on the mold. Begin by inspecting plants carefully, especially the undersides of leaves and stems, where many sap-feeding insects congregate. Look for live insects, cast skins, sticky honeydew, or ant activity. Ants are often attracted to honeydew and may indicate the presence of hidden pest populations. An integrated pest management (IPM) approach is the most effective strategy. Encourage natural enemies such as lady beetles, lacewings, parasitic wasps, and predatory bugs that help suppress aphids, scales, and whiteflies. Avoid unnecessary broad-spectrum insecticide applications that may disrupt beneficial insect populations. When pest numbers exceed acceptable levels, select insecticides based on the target pest and follow all label directions. Once the insect population is reduced, honeydew production will decline, and existing sooty mold will gradually weather away through rainfall, irrigation, and normal leaf growth. In some situations, washing leaves with water can improve appearance, but this will not solve the problem if the insects remain active. When blackened leaves appear in the landscape, remember that sooty mold is usually a symptom rather than the primary issue. Identifying and managing the honeydew-producing insects will provide the most effective long-term solution and help maintain healthy, attractive landscape plants throughout the season.
Figure: Sooty mold on crape myrtle leaves (A) caused by crape myrtle aphid (B), and sooty mold on crape myrtle stem/bark caused by crape myrtle bark scale (C)
 Rafia Khan, Ph. D Assistant Professor and Extension Specialist The European pepper moth (Duponchelia fovealis) is an emerging pest of concern in greenhouse and nursery production systems, particularly in ornamental crops. Accurate identification and early recognition of injury symptoms are critical for timely management, as infestations often go unnoticed until significant damage has occurred. Identification Adult moths are relatively small, with a wingspan of approximately 19-23 mm. They are typically tan to brown in color. The front wings have two cream-colored bands; outer one has a finger-like projection. Their abdomen has white colored rings. The adults are weak fliers and hold their wings flat in a triangular shape at rest. Due to their size and coloration, adults can be easily overlooked among plant material. Eggs are very small, oval, and pale in color, and are usually laid in concealed locations such as the undersides of leaves, along leaf veins, or near the base of plants. These eggs are difficult to detect without close inspection. Larvae are the most damaging stage and are more commonly encountered than adults. Newly hatched larvae are small and translucent, but as they mature, they become creamy white to light brown with a distinct dark brown head capsule. Fully grown larvae can reach up to 15–20 mm in length. Larvae are typically found in protected areas such as the lower canopy, at the crown of the plant, or within the growing media. Their cryptic behavior makes them difficult to detect during routine scouting. Pupation occurs in silken cocoons that may be found in soil, plant debris, or along container edges. These cocoons are often covered with particles of soil or plant material, further aiding concealment. Injury Pattern The European pepper moth primarily causes damage during the larval stage. Feeding typically begins on lower leaves and stems, often near the base of the plant. Early symptoms include small chewing marks on foliage, which can be easily mistaken for minor or incidental damage. As larvae grow, feeding becomes more aggressive and extensive. Leaves may become skeletonized or exhibit irregular holes. Larvae may also bore into stems at or just above the soil line, causing girdling. This type of injury disrupts water and nutrient movement within the plant, often leading to wilting, stunted growth, or plant collapse. One of the distinguishing signs of infestation is the presence of webbing produced by larvae. This webbing is often mixed with frass (insect excrement) and plant debris, creating a messy appearance around the crown and lower foliage. In potted ornamentals, larvae may also feed within the growing medium, damaging roots and lower stems, which further contributes to plant decline. Plant injury is often concentrated in hidden areas, making early detection difficult. By the time symptoms such as wilting or significant defoliation are visible, larval populations may already be well established. In ornamental crops, even moderate feeding damage and contamination with frass can significantly reduce aesthetic quality, leading to reduced marketability or complete crop loss. Recognizing these identification features and injury patterns is essential for early detection and effective management of this increasingly important pest.
Photo credit, Rafia Khan
Rafia Khan, Ph. D. Texas A&M AgriLife Research and Extension Center Overton, TX. Texas A&M AgriLife Research and Extension Center Overton, TX Spring represents a critical period for greenhouse crop production because increasing temperatures and the availability of tender plant growth create favorable conditions for the development of several insect pests. Among these, aphids are one of the most common and economically important pests encountered during this time. Aphids are small, soft-bodied, winged or wingless, phloem-feeding insects. Aphids feed by piercing plant tissues and sucking plant sap. Their feeding can cause a variety of symptoms, including curled or distorted leaves, stunted plant growth, and reduced plant vigor. In addition to direct feeding damage, aphids excrete a sticky substance known as honeydew. Honeydew can accumulate on leaves and stems, leading to the growth of sooty mold fungi that reduce the aesthetic quality and market value of ornamental plants. Some aphid species can also transmit plant viruses, making early management even more important. Many aphid species reproduce through parthenogenesis and give birth to live nymphs, allowing populations to increase exponentially within a short period. As a result, even low initial infestations can quickly develop into significant pest outbreaks if not detected and managed early through regular monitoring and timely intervention. Early detection is the key to effective aphid management. Growers should inspect plants frequently, especially new growth and the undersides of leaves, where aphids often congregate. Yellow sticky cards can only help to monitor the winged aphids, but not the wingless adults. An integrated pest management (IPM) approach is the most effective strategy for managing aphids. Cultural practices, such as removing heavily infested plant material and managing weeds inside and around the greenhouse, can help reduce aphid populations. Maintaining good sanitation practices and carefully inspecting incoming plant material can also prevent new infestations. Biological control can be an effective tool in greenhouse systems. Natural enemies such as lady beetles, lacewings, and parasitic wasps can help suppress aphid populations when released at appropriate times. High pressure wash water spray can reduce the population of aphids. When aphid populations reach damaging levels, insecticides may be necessary. Growers should select products carefully and rotate insecticides with different modes of action to reduce the risk of resistance development. By combining monitoring, cultural practices, biological control, and responsible pesticide use, greenhouse growers can successfully manage aphids and protect the quality and productivity of their crops during the spring season.
Figure: Bean aphid (A), Crape myrtle aphid (B), and Green peach aphid (C). Photo courtesy: Rafia Khan
Rafia Khan, Ph. D. Texas A&M AgriLife Research and Extension Center Overton, TX. Spring is the most important production and sales season for Texas nurseries, and thoughtful preparation during late winter can significantly influence crop quality, pest pressure, and overall profitability. As temperatures begin to rise, the priority should be a thorough inspection of all overwintered plant material. Carefully examine plants for cold injury, root health issues, nutrient deficiencies, and early signs of insect or disease activity. Pests such as aphids, mites, whiteflies, and scale insects often establish tender new growth early in the season. Removing dead, damaged, or heavily infested plants reduces overwintering populations and minimizes the risk of rapid outbreaks once favorable conditions develop.
Equipment readiness is equally critical. Before spring applications begin, calibrate sprayers, fertilizer spreaders, and chemigation systems to ensure accurate delivery rates and uniform coverage. Check nozzles for wear, confirm pressure settings, and repair leaks. Proper calibration not only improves pest control efficacy but also prevents phytotoxicity, reduces product waste, and ensures compliance with label requirements. This is also a good time to review pesticide inventory and verify that products are properly stored and within expiration dates. Updating and reinforcing your Integrated Pest Management (IPM) program should be part of spring preparation. Establish a consistent scouting schedule and designate trained personnel responsible for monitoring crops. Use tools such as sticky cards, pheromone traps, and regular plant inspections to detect pest activity early. Accurate identification and threshold-based decision-making allow for targeted treatments and help prevent unnecessary applications. Early detection remains one of the most cost-effective pest management strategies in nursery production. Inspect irrigation systems before peak demand by checking drip lines, emitters, sprinklers, and pumps for leaks or uneven distribution, as poor irrigation can stress plants and increase susceptibility to disease and pests. Test growing media for pH and soluble salts, and ensure fertilization programs, especially controlled-release fertilizers, are properly applied to support healthy growth. Implement early weed control with uniform pre-emergent applications and winter weed removal to reduce competition and pest reservoirs. Provide staff with refresher training on scouting, safety, equipment use, and recordkeeping. A well-organized spring plan strengthens plant health, reduces pest pressure, and supports a successful nursery season. Rafia Khan, Ph. D. Assistant Professor and Extension Specialist Texas A&M AgriLife Research and Extension Center Overton, TX Winter greenhouse production in Texas may appear quiet, but insect pests often persist and slowly build inside protected structures. Mild winters and heated houses allow aphids, whiteflies, thrips, mites, and scale insects to survive and threaten spring crops. Choosing between spot treatments and whole-house applications during this period can strongly influence pest pressure later in the season.
Spot or localized treatments focus on infested plants or areas such as near doors, vents, or long-term crops. In winter, pest populations are often low and confined, making spot treatments an efficient choice. This approach reduces pesticide costs, limits disruption of beneficial insects, and lowers the risk of resistance by decreasing overall product use. This approach often work efficiently especially for early aphid, whitefly, thrips, and mite infestations when detected through regular scouting. However, spot treatments depend on careful monitoring. Dense canopies, mixed ornamental crops, and hidden feeding sites can allow pests to escape treatment and spread as temperatures rise. Missed infestations in winter often become difficult and expensive to manage in spring. Whole-house applications may be necessary when pests are widespread, prevalence of multiple pests, a pest outbreak, or the presence of highly susceptible ornamental crops. During winter, slower insect development and reduced plant growth can improve residual control from insecticides. Whole-house treatments are also useful between crop cycles to reduce carryover populations before new plants are introduced. The drawbacks of this strategy include higher costs, increased exposure to non-target organisms, and greater potential for resistance if products are not rotated properly. For most Texas greenhouse and nursery operations, the best winter strategy is a combined approach. Intensive scouting should guide early spot treatments, while whole-house applications should be reserved for high-risk infestations or pest outbreaks. Winter is also the ideal time to rotate modes of action, strengthen sanitation, and prepare a strong IPM program for spring production. Rafia Khan, Ph.D. Assistant Professor and Extension Specialist Texas A&M AgriLife Research and Extension Center, Overton, TX Texas A&M AgriLife Extension is working on publishing a series of educational articles to assist homeowners and green industry professionals in recognizing and managing two recently confirmed invasive insect pests in Texas: the two-spot cotton leafhopper (Amrasca biguttula) and the short-spined thrips (Thrips parvispinus). These pests pose emerging risks to ornamental plants by affecting plant health, appearance, and market value.
The planned articles will provide clear descriptions of pest identification and injury patterns to support early detection. Feeding by the two-spot cotton leafhopper causes a condition known as “hopperburn,” characterized by leaf curling, yellowing, bronzing, reduced vigor, and, in severe cases, plant death. This pest attacks a wide range of ornamental hosts, including hibiscus, and is often difficult to detect due to its small size and concealed feeding behavior. Short-spined thrips are tiny, highly polyphagous insects that feed on numerous ornamental crops, including annual bedding plants and tropical ornamentals. Their feeding leads to foliar scarring, distorted shoots, flower drops, and stunted growth, resulting in reduced plant quality and marketability. In addition to injury symptoms, the articles will summarize current regulatory actions, including quarantine measures and inspection efforts implemented by regulatory agencies to limit pest movement and spread. Management options discussed will be based on science-based recommendations developed from research conducted by other researchers and institutions, with an emphasis on integrated pest management (IPM) strategies such as monitoring, sanitation, cultural practices, and targeted chemical controls when necessary. Through these publications, Texas A&M AgriLife Extension aims to improve awareness, encourage early reporting, and promote informed decision-making. By providing timely, research-informed guidance, Extension seeks to help homeowners and professionals reduce the impact of these invasive pests and protect the long-term sustainability of Texas landscapes and ornamental production systems.  We’re excited to share great news--HB 1592 is now law in Texas, creating a statewide pest and plant disease alert system through Texas A&M AgriLife.
This important legislation was authored by Rep. Mihaela Plesa, sponsored by Sen. Lois Kolkhorst, and backed by strong bipartisan support. It moved smoothly through the Capitol and was allowed to become law by Governor Greg Abbott. What Does HB 1592 Do? The new law creates a real-time, email-based alert system to notify:
Why It Matters ✔️ Faster response times to outbreaks ✔️ Less damage to plants and landscapes ✔️ More protection for Texas ecosystems and the green industry ✔️ Better preparedness for changing weather and pest patterns From nurseries and retail centers to city parks and farms, this new tool gives Texans a better way to protect the plants we depend on. TNLA Member Voices Made the Difference We’re proud that Bill Carson of Native Texas Nursery testified in support of the bill. His voice—and the support of TNLA members across the state—helped lawmakers understand the real-world need for this kind of early warning system. Looking Ahead When HB 1592 reached the Governor’s desk on May 25, we celebrated. Now that it’s law, we celebrate again—knowing that Texas is better prepared to fight invasive species and plant health threats. This is more than just a policy win. It’s a step forward for:
FREE Webinar: Stay Compliant & Avoid I-9 AuditsThursday, June 12, 2025 🕐 12:30 PM I-9 audits are increasing across the country—and for many businesses, one misstep could mean costly consequences. TNLA is teaming up with legal expert Jacob Monty of Monty & Ramirez LLP to bring you a can’t-miss compliance webinar: “Steps Employers Can Take to Avoid I-9 Audits and Stay Compliant.” 🔍 Topics include:
Horticulture Exploration Day – Texas A&MJune 2, 2025 | 1:00 – 4:00 PM Location: In the Horticulture/Forest Science Building: 495 Horticulture Rd, College Station, TX 77843 Who Should Attend: Anyone interested in horticulture-related careers Whether you’re a student, educator, or simply curious about horticulture, this event at Texas A&M offers a closer look into degree programs and careers in plant science. Attendees will explore everything from floral design and plant genetics to controlled environment horticulture—and meet with current students and faculty along the way 🪴 Pro Tip: You’re welcome to attend both! One connects you statewide, the other strengthens your local network. Whether you're just starting out or a seasoned professional, there’s something for everyone.  Women in Horticulture Events – Two Unique Opportunities to ConnectWe’re excited to share not one, but two upcoming Women in Horticulture gatherings—each with its own focus and purpose. Here’s what you need to know so you don’t miss out: 🌼 TNLA Women in Hort Virtual Meeting Hosted by TNLA (Statewide) 📅 Wednesday, June 25, 2025 | 🕙 10:00 AM | 💻 Virtual Join women across Texas in this virtual statewide event featuring guest speaker Jennifer Hatalski, TCNP of Calloway’s Nursery. This is a great chance to gain professional insight, ask questions, and feel inspired by other women in the industry—no matter where you're located.  🌿 Region VIII – In-Person Women in Hort Gathering Hosted by TNLA Region VIII (Central Texas Only) 📅 Saturday, June 7, 2025 | 🕓 4:00–8:00 PM 📍 Bear Creek Retreat, 13813 Carpenter Ln, Manchaca, TX 78652 This in-person gathering is exclusively for women in TNLA’s Region VIII, including Austin, San Antonio, and surrounding areas. It’s all about building local connections, swapping knowledge, and supporting one another in a relaxed, welcoming setting. RSVP to:[email protected]  OLE! Texas – Virtual Designer Training SeminarJuly 24–25, 2025 Hosted Online Calling all landscape architects and designers! The Outdoor Learning Environment (OLE!) Texas program is offering a two-day virtual seminar to train professionals on how to support nature-based outdoor spaces for early childhood education programs. 💸 Scholarships available to cover the $1,000 course fee—apply today!
 👏 What TNLA is Doing
From leading I-9 compliance efforts to promoting professional development opportunities like Women in Hort, TNLA is committed to connecting you with the resources that matter most. We advocate, we educate, and we cultivate a stronger green industry—together. Stay tuned for more upcoming events, and make sure you’re following us on Facebook, Instagram, and LinkedIn for updates! |
AuthorKim Cabrera, TNLA Marketing Manager Archives
July 2026
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