Tianniu insect pest is a relatively common insect pest in agricultural fruit tree planting and garden landscape seedling planting, because its larvae hide inside the trunk to eat xylem, which will cause poor plant growth or even dead branches, and also cause the affected branches to break under the action of external forces such as wind. Also because its larvae are hidden inside the branches, general insecticidal potions cannot effectively kill them. This pest is really a headache.
There is a loquat tree in the courtyard of the house, the age of the tree has been more than twenty years, in a few years ago began to have a cow insect infestation, in previous years I usually found that there are branches by the sky cow moth, I sawed off the branch, and then thrown away, so I know that it is a cow, but I have not seen what he looks like. Today, I inadvertently found worm dung by the well, and new hatred and old hatred surged into my heart, and today I have to see your true face of Lushan.
Cow worm dung
The picture above is the insect feces of the Tianniu larvae, which is actually the wood chips he eats combined with its secretions, because its secretions contain sugar and have a certain sweetness, so it is easier to attract ants. So it is easier to find the hiding place of the celestial cow, generally there are these insect droppings in the place of vertical to find the branches, you will find that some branches have black scars, there are honey-like secretions on them, with a few pokes with the tool, there will be a hole, this is the moth hole of the celestial cow, sometimes from the surface to this hole there will be ants climbing up and down, but also help you find the tree hole. If there are two tree holes in a branch, one is in the hole and the other is out of the hole, it means that the branch between the two holes has been hollowed out, and the larvae of the celestial cow have come out and transferred the next branch.
Today, out of curiosity to find the Celestial Bull larvae, I sawed off the mothed branch in its entirety, sawing it in a section of 5-10 centimeters, and then splitting each segment in half, as shown below
Mothed branches
Finally, in the last paragraph, a white squirming insect shadow was seen, and then it was hooked out with a thin wire. This is the nasty Tianniu larvae, looking really disgusting, the butt is still constantly pulling wood chips, as shown in the following picture:
Celestial bull larvae
There are also many ways to prevent and control Tianniu. First of all, tianniu winter is underground, in the early spring climbing trees to moth the trees, so you can coat the main pole of the tree in winter with stone sulfur compound (lime and sulfur mixture), which has a certain control effect on the trees on the tianniu tree. If the celestial bull has already begun to moth and the damage range is small, it can saw off the injured branches and carry out sterilization treatment such as incineration. If the scope is expanded, due to the particularity of the tianniu insect pest (insecticide can not be sprayed), you can find the tree hole and stab it with a thin wire, or you can dip the original juice of the pesticide into the hole with cotton and smoke it.
There are no other effective killing methods, welcome to discuss!