<h1 class= "pgc-h-arrow-right" >, Tianniu</h1>
In the past, there used to be a brain teaser question, asking, "What cow can be killed with one punch?" "The answer is a snail, but today we're talking about another creature that can be killed with one punch. Li Shizhen described it in the "Compendium of Materia Medica" as follows: "A scorpion is a beetle, in decaying wood, eating wood hearts, wearing a cone knife, with a black mouth, a long body and short feet, and a slow and hairless knot." After the spring rains, it transforms into a celestial bull, with two horns like a buffalo (also has a horn). The color is black, with white dots on the back, and the upper and lower edges are woody, and it is not far from soaring. "This creature, it's the Celestial Bull.
The Celestial Bull is a general term for insects of the Coleoptera family, which is characterized by its antennae. The antennae of the Celestial Bull are very long, and many of the Antennae are longer than the length of the body. In the world, there are more than 20,000 kinds of Tianniu that have been found, and there are about 2200 species in China. It can be said that there are many varieties of Tianniu and widely distributed.
<h1 class="pgc-h-arrow-right" > second, hazard characteristics</h1>
Tianniu larvae have the longest survival time (up to more than 8 months) in the tree body and are the most harmful to fruit trees. The female bites through the bark with her palate to form grooves before laying eggs, and then lays one egg (and many more) in each slot. When the eggs hatch out of the larvae, the young larvae feed under the bark, and when they are older, they burrow into the xylem as a pest, and the larvae move in the trunk, opening the bark at intervals as ventilation holes, pushing out excrement and wood chips outward.
<h1 class= "pgc-h-arrow-right" > third, Tianniu breed</h1>
The light shield green sky bull can reach a length of 24 to 27 mm, and the whole body is dark green. Its forebreast is about equal in length and width , the shield is shiny , the antennae and feet are dark blue to black-purple , the head has fine incisions , and the antennae are slightly longer than the body length.
Orange-brown celestial bull, female adult body length 46 mm, male body length 36 mm. The body and wings of the orange-brown celestial bull are black, densely covered with short yellow hairs, and there is a longitudinal groove in the center of the head; the stalk and stem segments of the antennae are black, the base of each segment of the whip is grayish-white, the end is black-brown, and the antennae are longer than the body; there are transverse wrinkles on the back of the forebreast, there are 1 thorn-like protrusions in the center of the sides, and the base of the elytra is densely granular black grains.
Star Sky Bull, body length of about 24 ~ 39mm, width of 9 ~ 15mm, body black, shiny. The antennae are whipped in 11 segments, and the base of each segment from the 3rd to the end of the antennae has small markings composed of fine blue-white fur, the antennae of male insects exceed the outside of the body by 4 to 5 segments, and the antennae of female insects exceed the outside of the body by 1 to 2 segments. There is a longitudinal concave line in the center of the head, and there are 3 nodular protrusions in the middle of the dorsal plate of the anterior thorax, with 1 thick and short spike on each side. The elytra are black , and each elytra is scattered with about 20 white spots of varying sizes consisting of fine hairs.
<h1 class = "pgc-h-arrow-right" > fourth, integrated control</h1>
A. Physical prevention and control
1. Killing adult insects:
For celestial cattle with suspended death or dry-based habitat characteristics, artificial shock fall can be used to hunt or kill directly.
2. Eliminate larvae:
Manual hammering of insect eggs and peeling of bark hooks kill larvae.
3. Whitening of the trunk:
The trunk 1.5-2 meters above the ground is whitened to prevent the tianniu from spawning. If there is a shear and saw on the fruit tree, it is also necessary to apply protective agents (varnish, etc.) in time to prevent the tianniu from laying eggs.
4. Booby trap:
For some adult insects of Tianniu (such as: peach-necked Tianniu) with sweet and sour properties, it can be artificially prepared with sweet and sour liquor liquid (sugar: vinegar: wine is 1:0.5:1.5), and add insecticides (such as: enemy insects, etc.) for booby traps.
B. Biological control
The Celestial Bull has many predatory and parasitic predators, and the swollen-legged wasp is one of them. Swollen-legged wasps can find larvae and pupae along the worm path and lay eggs in the larvae or pupae. After hatching, the eggs of the swollen-legged bee absorb the nutrients of the tianniu larvae and pupae and cause their death, so as to achieve the effect of prevention and control. In addition to the swollen-legged bees, there are also flower-sized parasitic nails, white zombies and parasitic nematodes, which are currently commercialized and can be applied.
C. Chemical control
At the peak of larval feathering (adult out-of-hole peak period of 6-7 months), use [New Willy] (cypermethrin) agent for control, spray the garden once in 5-7 days, the spray site is mainly based on the branch cadres, each spray, so that the liquid flows along the trunk to the roots; or use the above agents to dry.
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