A pine goes from green to yellow to red, and the questions start. Is it the southern pine beetle everyone talks about? Will it spread to the rest of them? Can I spray it? Almost everything written about pine beetles online is about a beetle that has not been reported in Texas since the 1990s. Here is what is actually happening in Deep East Texas pines, how to read the bark yourself, and what is worth doing about it.
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The southern pine beetle, Dendroctonus frontalis, has a fearsome reputation across the South, and it earned it. But according to Texas A&M Forest Service, it has not been reported in Texas since 1998. A trap-tree study run in East Texas from 2002 through 2009 baited more than 25 pines a year and did not lose a single one to it. Foresters call this a latent phase. The beetle is not gone from the region forever, and it is worth understanding, but it is not what is killing the pine in your yard this summer.
What kills pines here is usually the Ips engraver beetle, a group of three related species that goes after pines already weakened by something else. That distinction matters more than it sounds, because it changes the diagnosis, the urgency, and what you should do next.
You can do most of this diagnosis yourself with your eyes and a hatchet. Two things tell the story: where the pitch tubes are, and what shape the tunnels make under the bark.
If you find S-shaped galleries and white popcorn pitch tubes on multiple pines, that is worth reporting to Texas A&M Forest Service. It would be unusual for this area, and it is the kind of thing they want to know about.
Healthy pines with good sap pressure mostly drown attacking beetles in resin. A pine gets picked off when something has already knocked its defenses down. In Nacogdoches County the usual culprits are:
No spray saves an infested pine. This is the hardest part to hear, and it is where money gets wasted. Once beetles are under the bark and the needles are turning, the tree is gone. Nothing you spray on the outside reaches them, and the tree cannot recover even if you killed every beetle in it. Anyone who offers to spray your dying pine back to health is selling you something that does not exist.
Preventive sprays are real but narrow. High-value uninfested pines, the specimen tree next to the house, can be protected preventively. That is a licensed applicator's job, it has to be done before attack, and it makes sense for a handful of trees, not a stand.
Removal is about the neighbors and the target. Two honest reasons to take a beetle-killed pine down. First, the beetles in it move to the next stressed pine, so a spot can walk across a property. Second, a dead pine is a countdown. It dries, gets brittle, drops limbs, and becomes harder and more expensive for a crew to take down safely every month. A dead pine leaning at nothing in the middle of a pasture is a different decision from a dead pine over your roof.
Do not stack the wood with your good pines. Beetles keep emerging from cut infested wood. If you are keeping it for firewood, move it well away from living pines, or debark it, or cover it. Do not haul infested pine wood to another property, which is how spots get started in new places.
Water during drought is the cheapest prevention there is. Deep, infrequent watering of high-value pines through a dry summer does more for beetle resistance than any product you can buy.
People often wait to see whether the tree recovers. It does not, and the waiting costs money. Roughly what happens after the needles start to change:
No. Once beetles are under the bark and the needles are changing color, no spray reaches them and nothing brings the tree back. Preventive sprays exist for high-value uninfested pines, but they are a job for a licensed applicator and they protect, they do not cure.
Probably not. Texas A&M Forest Service reports no southern pine beetle in Texas since 1998, and an East Texas trap study through 2009 found no SPB attacks. In this area a dying pine is far more often Ips engraver beetles, which attack pines already stressed by drought, construction damage, or lightning.
Look at where the pitch tubes are and what shape the galleries make under the bark. Ips attack the flat bark plates and leave reddish-brown pitch tubes, with galleries in I, H, or Y shapes. Southern pine beetle attacks the crevices between plates, leaves creamy white pitch tubes, and leaves winding S-shaped galleries.
Removal is about the trees around it and about what the dead pine will hit. Beetles move on to neighboring stressed pines, and a beetle-killed pine gets more brittle and more dangerous to remove every month it stands. A dead pine near a house or a drive is a removal, not a someday project.
Not stacked next to your other pines. Beetles continue to emerge from cut infested wood. If the wood is kept, it should be moved well away from healthy pines, or debarked, or covered. Do not move infested pine wood to a new property.
Not necessarily. Ips take the weakest tree available, so the question is whether your other pines are stressed too. If they are healthy and the drought breaks, a spot often stops on its own. If several are fading at once, that is worth a look from someone who knows what they are seeing.
Nacogdoches Tree Pros publishes this guide as a free community resource. We are an independent referral service that connects Nacogdoches County homeowners and landowners with an insured, independently owned local tree company. This guide is general information, not a diagnosis of your specific tree.