There are many kinds of Tengu. Here we will only talk about the two kinds of tianniu that are the most harmful to citrus and other fruit trees, and are characterized by drilling holes for food. Fruit growers in low-altitude areas talk about woodworm discoloration. The harm of the wood drill insect to the fruit tree is shocking, and only one night, you see the saw foam drilled by the wood drill worm, and it has accumulated a large amount.
The newly hatched Tianniu larvae, starting from the surface of the two-centimeter-thick branch, as if a child did not understand things, had no directionality, and punched holes on all four sides, and some even punched holes ten centimeters upwards before turning around and moving downwards. All the way through the holes, sawfoam and feces are made from the xylem to the roots.
The trees that were killed began to age that year. How to fertilize is absorbed less, and it can no longer flourish. Even the wormholes flow black water, causing dead trees.
Entering the end of June and the beginning of July, it is the eve of the feathered adult insects of Tianniu, which is the largest in size and the most food, and a day and night will accumulate a pile of saw foam under the tree. It also provides us with a clear sign so that we can seize the opportunity to inject poison and stuff wormholes.
Around July 15, newly feathered adults moved slowly. The ground under the tree can be captured manually.
Around July 20, after flying at night and mating, random eggs were laid on the surface of two centimeters thick branches in the middle and upper part of the tree, which looked like a fingernail cap of soft cotton, but it was actually a Sichuan-shaped three-channel ditch and six eggs. Larvae can be spawned in about ten days.
From July 25 to August 1 every year. It should become an activity day for the institutional investigation of the Celestial Bull. Take the upper middle part of the tree to inspect the surface of two centimeters of thick branches. As soon as the eyes are swept away, they can see clearly. Dig up the eggs of the celestial cow with the tip of a knife. Inject 50 times the liquid of Dragon Lile Emulsion into the nail-like white soft sponge. In this way, the garden guarantees that there will be no tianniu this year.
A little later, around August 1st, with the Ladder Check tree, I saw that there were already four or five small wormholes around the soft body of the fingernail cover. This is a newly hatched Celestial Cow larvae. You just need to use the needle of the syringe to insert the soft sponge body to push the drug, and you will see several wormholes bubbling out at the same time. Then the young guy will die when he sees the medicine.
Needles for large trees "cure insect pests."
If you do not do this work, you will have to use the injection of medicine to plug the mud method, the poison cotton plug hole method, and the poison match infarction hole method to eliminate it. In the afternoon, it is good to stuff the medicine, because the celestial bull kills the tree at night at the bottom of the hole where the saw foam is coming out, and rests at the second hole during the day. Each injection with a large syringe will be 100 times the venom of chlorpyrifix, must be infused more than the second hole high, and the hole is easily blocked with mud.
You can build a high-level syringe yourself: take a long thin tube with a needle and wrap it around tape to fix it on a two-meter-long bamboo stem. Basic success. The large syringe is filled with venom and firmly docked with the outlet under the infusion tube. Pressurized push tube plug, the liquid is shot out from the top needle, one push and one out of the liquid, can be directly injected into the three-meter-high wormhole.
There were no more bugs in the old hole that had turned black.
Sai Dong opposes the use of enemies and fears, and it is most likely to burn the bark of a slip.
After winter pruning, the stumps of firewood should be crushed or burned out of the garden. Prevent pests from re-ascending the tree.
Beetle
The eggs of the tianniu are mostly in a single orchard without orchards on all four sides, and there are fewer eggs in contiguous orchards. Five or six trees from the side of the road lay more eggs, and there are fewer in the middle of the ground. Therefore, the focus on prevention and control relies on a few trees on the side of the road to solve half of the problem. Touching the law of the activity of the tianniu, the prevention and control work was more effective with half the effort. It must be called nowhere to hide.
Text/Li Genkuan
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