Tianniu because of its strength as a cow, good at flying in the sky, so get the name of Tianniu, in the garden, Tianniu is one of the serious harm of dried moth pests, known as the garden people's "heart of the disease", this issue of Xiaobian sorted out the occurrence of Tianniu and prevention methods, let's take a look at it!
【1】Identification of Tianniu:
Adult tianniu: the body is oblong-cylindrical, the back is slightly flattened; the antennae are born on the protrusions of the forehead (called antennal basal tumors), which have the function of making the antennae rotate freely and covering the back of the insect body backwards. The claws are usually single-toothed and a few are attached. In addition to sawing cattle, the mid-thorax dorsal plate often has a pronouncer.
Larvae: coarsely fattened, oblong, slightly flattened, a few slender. The head is broad or oblong-oval, often retracted deep into the dorsal plate of the anterior thorax.
【2】Hazard characteristics of Tianniu:
The celestial bull feeds mainly on larvae, lives the longest, and is the most harmful to the trunk. When the eggs hatch out of the larvae, the young larvae moth into the trunk, initially feed under the bark, and when the age increases, it burrows into the xylem as a pest, and some species only stay under the bark and do not moth into the xylem. The larvae move within the trunk, and the shape and length of the moth-eating tunnel varies with species.
【3】How to identify the hazard of Tianniu from the appearance:
Since their larvae feed on tree trunks or branches, they open their mouths to the bark at a certain distance as ventilation holes and push out excrement and wood chips outward. Therefore, when it is found that tree trunks have wood chips and excrement, it is a tianniu hazard.
【4】Prevention and control methods:
Before or at the beginning of the occurrence of Tianniu, a set of 40 kg of root moths with water was used to control and control, and the effective period was up to 6-12 months.
