Field note: On June 29, 2018, canon 200mm F5.6 was taken in The Peach Grove of Luopu Park, Luoyang City, Henan Province. On the way, several peach-necked celestial cows were found, and the first time I saw this breed, I saw that the shape was similar to that of the celestial cow, and I did not know the name at that time. On the way back, I searched with intelligent software to know that this bug was called peach-necked tianniu, and it was a pest.
Peach-necked celestial bull
The peach-necked celestial calf is a genus of Coleoptera, Acetae. The body is black and shiny; the dorsal plate of the anterior thorax is red, with 4 smooth warts on the back, with lateral spines; the elytra are smooth, the base is wider than the anterior thorax, and the end is tapered; the antennae of males exceed the body length by 4 to 5 segments, and the females exceed 1 to 2 segments. It is mainly distributed in Beijing, Northeast China, Hebei, Henan, Jiangsu, Zhejiang and other places.
Adults: body black, shiny; red dorsal plate of the anterior thorax, with 4 smooth warts on the back, with lateral spines; elytra wings are smooth, the base is wider than the anterior thorax, and the end is narrower; the male antennal adult has two color types: one is a red neck with a black shiny body and a brownish red forebreast, and the other is a black neck type that is all black and shiny.
According to preliminary understanding, Fujian and Hubei have "red neck" and "black neck" individuals, while north of the Yangtze River such as Shanxi, Hebei and other places only see "red neck" individuals. The adult pink-necked Lycopoda is about 28–37 mm long, black, shiny, brownish-red on the dorsal plate of the forebreast, and 4 smooth neoplasts on the dorsal surface; the elytra have a smooth wing surface, the base is wider than the anterior thorax, and the posterior part is narrower.
Mature larvae are about 42-50 mm long, and the larvae are milky white at a young age and yellowish white when old. A generation occurs in 2-3 years, with larvae overwintering in the moth tunnel, and after budding in the spring, they begin to be active. In the field, adult insects appear in June and July, mostly perching on tree trunks.
The head is black with many transverse wrinkles on the ventral surface, and there are deep concave holes between the eyes at the top of the head. The antennae are bluish-purple , with a leaf-like protrusion on each side of the base.
There is one spur on each side of the chest and four on the back. The surface of the elytra is smooth, the base is wider than the anterior thorax, and the posterior end is narrower.
The male is smaller than the female, the anterior thorax ventral surface is densely marked, and the antennae exceed the insect body by 5 segments; the female has many transverse wrinkles on the ventral surface of the anterior thorax and abdomen, and the antennae exceed the two segments of the insect body.
The peach-necked celestial bull generally takes two years, and a few three years, occurs in 1 generation, overwintering in the 1st year of the juvenile larvae and the 2nd year of the old mature larvae. Adults appear between May and August; adult occurrences are postponed from south to north. Adults occur in Fujian and southern provinces in late May; in Hubei, the most adults occur in early to mid-June; and adults finally occur in early July. Adults in Hebei emerge in early to mid-July, adults in Shandong emerge from early July to mid-August, and adults emerge from mid-July to mid-August in Beijing.
Hazard object
It mainly harms stone fruits, such as peaches, apricots, cherries, plums, plums, etc., and also harms willows, poplars, oaks, persimmons, walnuts, peppers and so on. The larvae bite the tunnel in the trunk, causing the cortex to fall off and the trunk to hollow, affecting the delivery of water and nutrients, resulting in weak tree strength, reduced yield, and even death.
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