What is foreign spicy ?

It is a stinging moth with a body length of about 14 15 mm. The color is yellow-green, and the eggs are oval.

Spicy is also an omnivorous pest, which mainly feeds on the branches and leaves and epidermis of garden plants such as tea trees, walnut trees, poplars, willows, bauhinia, sycamores, etc., thus affecting the growth of plants.

The scientific name of the so-called "stinging hand worm" on walnut trees is the yellow thorn moth, which has developed from a minor pest to the main pest of walnut trees in recent years.

From early July to late August, the larvae of P. flavus are at their peak, and the larvae before the third instar gather in one place, feeding on the lower epidermis and mesophyll of the leaves, but not the upper epidermis, forming transparent round spots, and the leaves are reticulated. At the 4th instar, the leaves are fed into holes, and the larvae above the 5th instar can eat up the leaves, leaving only the leaf veins, and the leaves are mesh-shaped.

Spicy is the larvae of the yellow thorn moth, in the process of management and harvesting with the tree carelessly, it is easy to be stung, although there is no danger to life, the pain of "fire burning" is unbearable, and in severe cases, it is difficult to sleep at night.

Post-stinging treatment.

1. Stick the injured part with tape immediately after stinging, and you can clean up the fine hairs that pierce into the **. If there is sweat on the injured area, it should be blotted with a paper towel before sticking. This is the most straightforward method.

2. The poison of spicy seeds is acidic. You can apply alkaline noodles and thick soapy water to the affected area to neutralize the acid. Generally, the pain will subside in about 10 minutes.

3. After being stung, you can use a stick to pick through the body of the spicy man, and you will find a green (or green) and black meridian. Take out the green (or green) one of them and mash it, and apply it to the stinged to immediately have a miraculous effect. Don't touch the black one, that's where his venom is.

4. After being stung, you can apply some toothpaste on the affected area, the affected area will feel cool after wiping the toothpaste, and the pain will be reduced after about 5 minutes.

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Scientific name: Thorn moth.

Scientific name: Thosea sinensis (walker).

Synonyms: spiny moth, octagonal insect, octagonal jar, spicy seed, sheep wax jar, white thorny hairs belong to the lepidopteran spiny moth family.

Distribution & Hazards:

It is distributed in Heilongjiang, Jilin, Liaoning, Hebei, Shandong, Anhui, Jiangsu, Zhejiang, Hubei, Hunan, Jiangxi, Fujian, Sichuan, Yunnan, Shaanxi and other places. There are more than 80 kinds of camellia, poplar, gardenia, begonia, yueji, maple poplar, boxwood, camphor tree, plane tree, elm, willow, bauhinia, plum, peony, peony, osmanthus, magnolia, crape myrtle, wisteria, white orchid, banyan tree, wood polo, mahogany, human face fruit, locust tree, thorn tree, tung oil, citrus and so on.

The larvae chew on the leaves into holes, and in severe cases, the petiole or main vein remains, which affects the tree and ornamentation.

Morphological characteristics: Adult: female moth body length 13 18 mm, wingspan 28 35 mm, body brown; a brown line obliquely at the apical angle of forewings to the hind margin; Forewings dark grayish-brown, oblique to the posterior margin at the middle chamber. The male is about 10 mm, with a wingspan of 26 to 31 mm; There is a black spot in the upper outer corner of the middle of the male moth; hindwings greyish-brown; The joints of the anterior thoracic foot have a white patch, which is an important feature that is easy to identify.

Eggs: oblate, oval, long, grayish-brown before hatching, pale yellowish-green before hatching.

Larvae: about 21 24 mm in length, flattened, slightly raised on the back, resembling a tortoise shell. The whole is green or yellow-green, the dorsal line is white, and there are 10 verrucous protrusions on each side of the body edge.

There are prickly hairs on it, with 2 small clumps of prickly hairs on the back of each segment, and a red spot on each side of the dorsal surface of the 4th segment.

Pupa: nearly oval, resembling a bird's egg, body 10 15 mm, pale black-brown.

Cocoon: Light brown in color, cocooning in adjacent shallow soil.

Living habits: 1 generation occurs in 1 year in Hebei, Shaanxi and other places, 2 generations occur in 1 year in the Yangtze River area, and a few 3 generations. In Nanchang of Jiangxi Province, 2 3 generations of 2 and 3 generations occurred in 1 year, and the 2nd generation was the mainstay, and the old mature larvae cocooned in the soil for winter. Pupae from mid-April to mid-May of the following year.

Most of the second-generation cocoons survive the winter, and only a few of them emerge during the year and continue to breed. Local third-generation larvae that do not have time to form cocoons in early November are frozen to death. The occurrence of the first generation is relatively large throughout the year.

The first generation of Nanchang egg stage is 6 8 days each, and the third generation is 7 8 days. There were 8 instars in the larval stage, and the larvae of each generation lasted 25 32 days for the first generation, 23 27 days for the 2nd generation and 31 38 days for the third generation, respectively. The first generation of cocoon stage is 14 26 days, and the internal pupal stage is 9 16 days; 229 238 days of emeritation and 19 28 days of inner pupal stage in the second generation; The 3rd generation is 199 288 days, and the internal pupal stage is 18 28 days.

The adult emergences mostly at 18:00 20:00, lying dorsal in the leaf or weeds during the day, and is active at night, with strong phototaxis, 21:

From 00 to 1:00 the next day, the lights are the most vigorous; Spawn is laid the night after mating. The eggs are mostly laid on the leaf surface, occasionally on the back of the leaf, and scattered.

The hatched larvae feed on the egg shell first, then move to the dorsal leaf after the 2nd instar, and the 6th instar larvae feed on the whole leaf leaving only the petiole. When it is severe, it can eat up the whole plant, affect the growth of the tree, and reduce the ornamental value.

Spicy seeds.

Spicy seed, brown-edged green thorn moth, belongs to the lepidopteran stinging moth family. Also known as green thorn moth, green thorn moth, yellow edge green thorn moth, four-point thorn moth, curved green thorn moth, etc., commonly known as itchy spicy. It is widely distributed and almost all over the country.

Adult body length 15 to 16 mm, wings 36 to 40 mm, body green; compound eyes dark brown; The eggs are oblong, yellow-green, the older larvae are slightly oblong, yellow at first, slightly yellow-green to green; Pupae ovate, initially milky white to pale yellow, then gradually turning yellowish-brown; The cocoons are oval and hard, mostly the color of the host tree, usually grayish-brown to dark brown.

It is distributed in Fujian, Heilongjiang, Jilin, Liaoning, Inner Mongolia, Shaanxi, Shanxi, Beijing, Tianjin, Hebei, Henan, Shandong, Anhui, Jiangsu, Shanghai, Zhejiang, Jiangxi, Guangdong, Guangxi, Hunan, Hubei, Guizhou, Chongqing, Sichuan, Yunnan and other places.