Longview Arborist Services, TX
Pests and disease in Longview trees: pine beetles, hypoxylon canker, oak wilt, and telling a pest problem from a water problem.
What This Site Covers
East Texas Arbor Guide collects field notes on the insects and diseases that turn up in Longview yards, written for the people who own the trees rather than the people who spray them. The Piney Woods sit on sandy, acidic ground and take roughly four feet of rain a year, and that combination decides which problems are common here.
The Pines Around Gregg County
Loblolly and shortleaf pine dominate the tree line on most local lots, and both host southern pine beetle and the smaller Ips engravers. Neither insect has much interest in a pine that is growing well. Attacks concentrate where roots were cut, where soil was compacted under parked vehicles, or where a dry stretch drained the tree of resin pressure.
Hardwood Troubles
Post oak, water oak and southern red oak carry a different set of problems. Hypoxylon canker follows drought stress and announces itself when bark sloughs away in plates. Oak wilt travels through connected roots and through beetles visiting fresh wounds. Sooty mold and mistletoe look alarming from the driveway and are usually far less serious.
Below the Ground
A great deal of what gets blamed on insects actually starts at the roots. This county has pockets of tight clay and low ground that hold water after heavy spring rain, and saturated soil suffocates fine roots before any fungus shows up. The symptoms overhead can look exactly like thirst.
Treatable, Manageable, or Neither
Sorting the fixable from the finished saves real money. Scale insects, mistletoe and many drainage problems respond well to a change in care or one targeted pruning cut. A pine under mass beetle attack does not, and an oak already carrying hypoxylon crust is reporting a decline that began seasons earlier.
Guides
Three longer pieces follow this page. The first works through beetle activity in weakened pine, what the pitch tubes and gallery shapes are telling you, and why the calendar matters. The second covers hypoxylon canker and oak wilt together, since both punish stressed oaks. The third separates a pest problem from a water problem.
Latest Guides
Pine Beetles in Longview: Reading the Signs on Stressed Loblolly
2026-09-06
Why Beetles Choose the Tree Next Door
Bark beetles are not random about their hosts. A vigorous loblolly floods any fresh boring wound with resin fast enough to push a small insect back out of its tunnel, so the beetles that succeed are working on pines whose resin pressure has already fallen. Trenching through the root plate, compacted ground, lightning injury and a long rainless summer all lower that defense. On most Longview properties, the first pine lost is the one that got disturbed.
Southern Pine Beetle and the Winding Gallery
Southern pine beetle is the species that spreads on its own. Adults tunnel through the outer bark and cut S shaped galleries that wander across the grain in the inner bark, girdling the stem as they extend. The beetles also introduce staining fungi that interfere with water movement through the sapwood, so a heavily attacked pine is being killed two ways at once. Infestations widen as a spot, pulling in neighbors that were never stressed.
Ips Engravers and Tops That Fade First
Ips engraver beetles behave differently from that. Their galleries run with the grain in rough I, H or Y shapes, and the smaller species often begin high in the crown, which is why a fading top above otherwise green foliage deserves a close look. Ips generally requires a tree that is already failing, or a stack of fresh cut pine to breed in. Green logs left through the summer supply the next generation with a nursery.
Pitch Tubes, Sawdust and Color at the Base
Examine the trunk before concluding anything. Popcorn sized blobs of hardened resin on the outer bark, known as pitch tubes, mark attack points, and how high they sit on the stem hints at which insect is present. Reddish boring dust gathering in bark crevices or around the root flare is a second clue. Large soft resin masses low on the trunk usually indicate black turpentine beetle, which works slowly and rarely kills outright.
What Actually Helps Once Beetles Are In
After a pine is fully colonized, nothing applied to the outside of the bark reaches the insects underneath, and that tree will not recover. Attention belongs on the green pines still standing nearby: leave the root zone alone, water deeply during drought, and move infested material off the property promptly instead of stockpiling it. Preventive trunk treatment exists for individual high value pines and is work for a licensed applicator.