Oh dear. From what I understand, if it is the Three Lined Borer, there is no treatment except to cut out the borer. I would contact your local extension office to see what can be done, and what borer you're dealing with. This is usually found in the South, and you are in zone 6 (your post ID doesn't say where you're located), so I'm guessing? you're not located in the South. It could be a Stem Borer, and the results are the same - death of the tree unless it is minimally affected and you can cut out the borer. Patty S.

If you are referring to the Palo Verde Borer Beetle the answer is no. These beetle larvae live inside the roots until they mature and then they emerge as adult beetles. (They are big and ugly). These larvae are called grubs and are a cream color generally with a brown headcap. They curl into a 'c' shape when disturbed. Caterpillars are the larvae of butterflies and would not be eating your tree. Because your tree has been in the ground nearly a year you should only need to water deeply once every two to three weeks during the coming summer and less often next fall and winter. Applying about 70 - 90 gallons each time is ideal for a tree the size of yours. If your watering is correct and you haven't applied any herbicides (weed killers like Weed B Gone which contains 2-4-D) in the area, then there is a chance your tree may be planted too deeply. The zone where trunk tissue turns into root tissue (root flare or crown) is designed to remain exposed to air. When plants are installed too deeply soil if often added to make the container area level with the surrounding soil. This reduces the oxygen exchange to the trunk tissues causing suffocation. It is easy to check - just gently remove gravel or soil away from the trunk until you see roots. I have seen trees planted as much as 8" - 12" below grade. If this is the case the roots should remain just below the soil level, but leave about a 6 inch zone around the trunk so air can circulate. Recovery may take a while. Good luck. Here is a link that might be useful: Palo Verde Borer

Oak can be considered a weed species, if unwanted trees grow in your garden. And yes prolific seeding Ash can be definition of weed species. But know Ash does this, because its a "Pioneering" species. And also an ecosystems most influential Keystone species keeping, other invasive species in check. While securing ground so pre-settlement species like Oak can come back someday! Ash Pre 1950 before popular cultivars like Marshal seedless were sold by nurseries, Green Ash was even more iconic than Sycamore for its production of one strong apical dominant leader. These "Plant and grow above your roof" Green Ash can still be found today with ages of 60 and older. In fact, its a good way of estimating a trees age, and can determine if ones ash is younger or older than 60. So presently all the Green ash with one Roman column sized trunks, are those pre 1950 grown examples. A few owners who lost their old wild ash trees to EAB, but are keeping a seedling or two growing. Are shocked how their young trees require no structural pruning because they continue to be so apical dominant. One big difference between Green and White Ash, is how growth on end of limbs on Green Ash, curve upward. And growth habit of White Ash results in all limbs and branches pointing straight upward. White Ash, Sugar Maple, and American Elm, are powerhouse species that can handle growth of multiple limbs extending outward from one lower spot on trunk. Compared to say Callery pear trees, which fall apart with this growth habit. Those three hardwoods with this common trait, can continue to have conglomerate of multiple leaders stay well attached without self destructing. Horticulturally this is because they can handle included bark attachments, actually strengthening overtime by developing into one whole common mass of wood. As a Dendrologist observing thousands of felled trees, one cannot tell from outside that many times one single trunk had been made up from two or more trunks on Green Ash. And when compared to other species that produce twin trunks beginning low to ground, such as Silver Maple. Green Ash can easily become multitrunked tree, producing strongest attachments without fatal problem of included bark. For example, look at a Silver maple diverging into two large trunks, from a sideways view. And you will see pinching bulge extending outward. Yet on Ash with same structure, there is no pinch bulge. Because where two trunks converge, is all same wood without included bark in middle. Know that even Oaks can develop multiple leaders, when grown out in open. And when one finds an older multileader tree growing in middle of forest with all younger single leader trees surrounding it. These examples are called "Wolf" trees, which began growing after settlers cleared local forest during 1800's. Then new forest was later allowed to reclaim old riparian farmland, usually around 1900's. Its great that you all notice different unique growth habits between Green and White Ash. Even cooler is fact that there can be huge differences between wild species evolving from unique local conditions. So traits I point out, may not be true for Ash growing in your local area. One great example, is the wild variety of Biltmore White Ash from Ashville North Carolina which FL Olmsted had discovered. Which has pubescent fuzz on back of leaves, like Red Ash. At same time Scientists consider Red ash, just a variety of Green Ash. Another example is Junginger Autumn Purple White Ash variety a scientist found in Wisconsin local woods. And all those urban ones you see today, are clones that cannot seed. And before clearing of American forest which extended unbroken from East coast to Mississippi river. Tree hunters regularly discovered unique one of a kind examples they would officially characterize and list traits of. Then propagate new trees from cuttings for planting elsewhere.

In case you were invested: 100% borers. We performed open vine sirgery and removed FOURTEEN LARVA. We cut off a few vines that were too far gone. the larva were still quite small—none bigger than 1/4inch My trellised plant will be hard to save since I cant bury the vines, so we made a dirt collar and then saran wrapper the higher areas. Fingers crossed maybe that works @User @daninthedirt (USDA 9a, HZ9, CentTX, Sunset z30, Cfa)