In the first quarter of 2022, customs intercepted a total of 173 species of quarantine pests, a total of 13,900 times, including mad cow disease, African horse fever, highly pathogenic avian influenza, pine wood nematodes, red fire ants, Mediterranean fruit flies, wheat dwarf smut fungus, tomato brown wrinkled fruit virus, etc., which seriously threatened the safety of Agriculture, Forestry, Animal Husbandry and Fishery, Ecological Security and People's Health in China.
Recently, when Putian Customs inspected imported container logs, it intercepted a live spider and four egg sacs. After identification, the spider is an inter-spotted spider, commonly known as the black widow.
It is one of the 10 most venomous spider species in the world, and is 15 times more venomous than the venom of the rattlesnake. Each oocyst can contain 400-900 eggs. It matures in three months from the beginning of the egg and has a lifespan of up to 3 years. Many netizens feel that the entry of black widows is really terrible!
Think about it! 1 black widow, 3 months can hatch thousands of mature black widows
Erythroxylum is a genus of bulbous spiders, Arachnidae. Because the spider is a spider, the female spider often eats the male spider after mating, so it is also called "black widow". This species belongs to spiders with strong neurotoxins and is one of the most toxic spider species known today.
According to the data information intercepted by Putian Customs, a total of 4 egg sacs of poisonous spiders and 4 egg sacs were intercepted, and according to expert speculation, after three months, the eggs in the 4 egg sacs will hatch into mature black widow spiders.
According to predictions, according to 400 to 900 eggs in one egg sac, after three months, 4 egg sacs will hatch 1600 to 3600 mature black widows.
On closer reflection, if the black widows mature after three months, they will continue to lay eggs, which will eventually lead to a blowout in the number of black widows. Eventually there will be an uncontrollable situation.
How much of a threat is black widow invasion?
On Earth, there are many kinds of spiders, with more than 42,000 species recorded by humans, of which more than 3,800 kinds of spiders are distributed on the mainland.
Among them, the black widow is the best among the spiders, the size of the entire spider world is medium, roughly ranging from 2 cm to 8 cm, the body is roughly black, including a red spot pattern on the abdomen, but it is not famous for its body size, but for its highly toxic.
It is reported that among the venomous snakes, the rattlesnake is extremely venomous, but compared with the same dose of venom, the venom of the black widow spider is about 15 times that of the rattlesnake, but because the amount of venom of the venomous snake is more than that of the black spider, the probability of the poisonous snake dying is higher (the black widow can also cause death, the probability is lower).
However, because the reproductive ability of black widow is very strong, once the invasion occurs, the species can appear in a short period of time the population explosion, due to the lack of natural enemies in the early stage, the species can seriously lead to the disappearance of some biological populations, destroying the local ecological balance.
Moreover, black widow payment is very aggressive, and once violated, it will launch an attack. If a person is bitten by a black widow, poisoning occurs quickly, such as severe pain, nausea and stiffness, and occasionally muscle spasms, abdominal pain, fever and difficulty swallowing or breathing, and even death.
Scientists did an experiment in which the scorpion and the black widow of the five poisons were put together, and the black widow attacked first and bit the scorpion. From this analysis: both species are two of the five poisons, and Black Widow is more aggressive and toxic than scorpions.
Black Widow is already distributed on the mainland, so why worry about an invasion?
The Black Widow spider is a very widely distributed large spider, in fact, in Sichuan, Hainan, Taiwan, Yunnan, in the mainland, have been found Huamei Kou spider; In Xinjiang, the machaeatus spider is found, and its living environment is under stones and crevices in nature.
Although there is already a distribution of black widows on the mainland, for black widows who enter the mainland, the mainland is strictly controlled, because this species belongs to wild animals, and its body carries a large number of overseas bacteria and viruses.
On the mainland, any species entering the continent without inspection and quarantine is likely to have a serious impact on the health, ecological stability and agricultural security of the people of the continent.
In short, the mainland customs strictly controls the entrance and exit of this pass, prevents a large number of invasive alien species from entering China's national gate, protects the safety and ecological stability of the Chinese people, and praises the customs.