Yesterday, a van rammed into the cottonwood (I think that's what it is) and the protective bark was sloughed off. What should be applied to the area to prevent bacteria or insects from hurting the tree?
Unless the tree has been fully girdled (bark removed all the way around the tree), it is best to let the wound stay open. Applying anything on the wound can actually trap bacteria in the wound and cause more damage than good. This article will explain more and have some tips for cleaning the wound:
About a month ago, our large 30-year-old Cottonless Cottonwood tree was struck by lightning. There were probably 5 lines down the trunk, bark blown out near the roots and on the opposite side of the tree from the strikes. Its bark is now beginning to peel back. Is there anything we can do to save it?
Here is an article that you may find helpful: https://www.gardeningknowhow.com/ornamental/trees/tgen/what-to-do-for-storm-damage-trees-repair.htm
We had a cottonwood tree removed last fall and the stump was ground up under the dirt line. NOW our yard is full of suckers. Tried Sucker stopper, did not work. The dirt and lawn is now actually SPONGY and cracking around where the tree stump was and the suckers are EVERYWHERE! I have been digging them up with a dandelion digger, but they are getting worse. Is there a chemical that we can pour into these cracks to kill the roots? Any advice would be greatly appreciated. I have been told to try Super Kill's All on the suckers and in the cracks! What do you think?
Undiluted Round Up will help kill the roots. You will need to wound the roots (normally, people cut the suckers down and use those wounds) and then paint the undiluted Round Up on the wounds. The bigger or more wounds you paint, the better.The roots will suck the Round Up in and it will kill them. You may have to repeat the process a few times to fully kill the roots if the root system is still strong.
Our deck gets covered with a black sticky substance every summer and anything that is left out on the deck. It takes a lot of effort to wash it off every few weeks. Flies, wasps, and bees seem to be attracted to the leaves of the trees. The trees that shade the deck are: sassafras, sumac, white oak, and cotton wood. Is one of these trees causing the problem, and what should be done to prevent it next year?
Here is an article or two that you may find helpful: https://www.gardeningknowhow.com/ornamental/trees/tgen/how-to-remove-tree-sap.htm
We just bought and planted a 24 ft. cottonless cottonwood tree that has the bark cracked and somewhat broken 3 - 4 ft up the base of the tree. What should I do to repair this problem?
It is likely winter damage. As long as the tree is not girdled (the bark broken around the circumference of the trunk, then you should let it heal on its own. As a precaution, you may want to treat the wound with a fungicide to ward off disease, but do not seal the wound, as this can trap disease in the wound.
Young trees have thin bark and winter sun can cause it to crack. You may want to consider wrapping the tree's trunk in tree paper for the next few winters, to prevent further cracking.
We found this on our cottonwood tree. We livein Lyon County Nv. What do I do?
This small caterpillar is a leafroller.
Here is an article that will give you guidelines on how to deal with leafrollers:
Neighbor has 2 cottonwood trees in his tree lawn. Wind carries litter onto my lawn. Because I edge, it is in crevices. Bagging grass when cutting only gets rid of some. Is in bedding, screens, garage. Will water dissolve?
I would use your garden hose with a good spray nozzle to force the fluff out of the lawn.