墨西哥跳豆为什么会自己跳

❶ 墨西哥跳豆是怎么回事的呢

豆本身根本不会弹跳，都是里头飞蛾的蛹在作怪。由于跳豆飞蛾并不属于本区域的昆虫，农粮局担心引进我国的跳豆里的蛹会化成飞蛾，影响我国和周围国家的生态平衡。香港和日本也基于同样原因，禁止跳豆入口。

这些小豆子其实是盛产在中美洲一带的Sebastiana Pavoniana矮灌木的种子。每逢春季，跳豆飞蛾便会在这类矮灌木的花朵上产卵。幼虫孵化后，钻进种子荚膜里，吃光果实、在里头蛹化。

每个荚膜里有三瓣心皮，但未必每一瓣心皮都会有蛹寄居。下过第一场春雨后，荚膜里的心皮就会被抛离树身。里头的蛹便能自由弹跳，也就成了俗称的墨西哥跳豆。

大概四五个月，幼虫便能长大成为跳豆飞蛾，然后重复进行繁殖后代的过程。

❷ 墨西哥跳豆英文介绍谢谢了，大神帮忙啊

Mexican jumping bean From Wikipedia, the free encyclopedia (Redirected from Mexican jumping beans) Jump to: navigation, search A Mexican jumping bean is a phenomenon native to Mexico, where it is known as a brincador ("hopper"). Physically, Mexican jumping beans resemble small tan to brown beans. They are a type of seed in which the egg of a small moth has been laid. It is the moth's larva which makes them "jump". The beans themselves are from a shrub of the genus Sebastiania (S. palmeri or S. pavoniana), itself often referred to as the jumping bean, while the moth is a member of the genus Cydia, called a jumping bean moth. Contents [hide] 1 Life cycle 2 Playing with/testing the beans 3 Maintenance — "watering" and storage of the beans 4 Source of the beans 5 Jumping beans in popular culture 6 References 7 See also 8 External links [edit] Life cycle Five Mexican jumping beans Recording of a Mexican jumping bean in motion. Bean showing the "trap door" and discarded pupal casing After the egg hatches, the larva eats away the inside of the bean, making a hollow for itself. It attaches itself to the bean with many silk threads. The larva may live for months inside the bean with varying periods of dormancy. If the larva has adequate conditions of moisture and temperature, it will live long enough to go into a pupal stage. Normally, in the spring, the moth will force its way out of the bean through a round "trap door", leaving behind the pupal casing. The small, silver and gray-colored moth will live for only a few days. The larvae jump as a survival measure in order to protect themselves from the heat, which can cause them to dry out. The ultraviolet rays from the sun stimulate them to jump, even in cool temperatures, but leaving the beans in the sun for extended periods will dehydrate and kill them. [edit] Playing with/testing the beans Jumping beans are still widely available for sale in the United States (see links below). In the UK they were a common novelty item in the 1970s. They are a popular scientific and classroom project even now.[citation needed] When the bean is abruptly warmed, for instance by being held in the palm of the hand, the larva twitches and spasms, pulling on the threads and causing the characteristic hop. "Jump" is often an exaggeration, but the beans do noticeably move around. The beans should become active if one holds them in the hand (out of the box) for a few minutes. The beans should also appear to be a very slight shade of green on the side (as shown in the bean in the top picture, on the right). If the bean starts to turn brown (top picture, bean on the left), that indicates it is dying. If one shakes a bean near one's ear and hears a rattle inside, the larva inside has died. A plastic toy under this name was manufactured and sold in packages containing several devices in the 1960s. It resembled a "time release" capsule and had a metal ball inside. When the surface on which the capsule was laid was tilted, the ball would roll to the other end and make the capsule twitch. [edit] Maintenance — "watering" and storage of the beans To rehydrate the beans, they need to be soaked not submerged for a three-hour period in chlorine-free water once or twice a month. The chlorine found in tap water in some locales will kill them. Alternatively, one may let chlorinated tap water stand in an uncovered glass for about six hours before using, to let the chlorine dissipate. Just spraying the beans with a little water is ineffective in maintaining the larvae's lifespan.[1] Beans should be stored in a cool dry place, but freezing will kill them. [edit] Source of the beans The Mexican jumping bean (Laspeyresia Saltitans) comes from the mountains in the states of Sonora, Sinaloa, and Chihuahua; indeed, lamos, Sonora styles itself the "Jumping Bean Capital of the World". They can be found in an area approximately 30 by 100 miles where the Sebastiana pavoniana host tree grows. During the spring, moths emerge from last year's beans and deposit their eggs on the flower of the host tree. [edit] Jumping beans in popular culture Jumping beans were used as a recurring gag in many cartoons from the 1930s to the 1950s, wherein eating the beans would cause a character's whole body to bounce out of control and land on something painful.[2]

❸ 有趣的豆子成群结队跳个不停，墨西哥跳豆为什么会跳动

有趣的豆子成群结队跳个不停，墨西哥跳豆之所以会跳动，并不是由于豆子本身，而是由于这种豆子里含有虫子，跳豆之所以会跳跟这个虫子有很大的关系。

有趣的豆子成群结队跳个不停，你知道墨西哥跳豆为什么会跳动？欢迎留言讨论。

❹ 在美国找到了一种会动的种子，懂得厉害的时候简直会跳起来。请问高手是什么种子呢原理是什么

核桃

❺ 墨西哥跳豆的原因

豆本身根本不会弹跳，都是里头飞蛾的幼虫在作怪。幼虫很大，虫的后腿抓住豆子内壁，然后迅速的向上躬身，豆子就跳起来了。房间越暖和，它跳得越欢。有人问怎么虫子会进豆子里呢？原来每逢春季，跳豆飞蛾便会在这类矮灌木的花朵上产卵。幼虫孵化后，钻进种子荚膜里，吃光果实，在里头蛹化。

❻ 墨西哥跳豆是怎么回事

豆本身根本不会弹跳，都是里头飞蛾的幼虫在作怪。幼虫很大，虫的后腿抓住豆子内壁，然后迅速的向上躬身，豆子就跳起来了；房间越暖和，它跳得越欢。有人问怎么虫子会进豆子里呢？原来每逢春季，跳豆飞蛾便会在这类矮灌木的花朵上产卵。幼虫孵化后，钻进种子荚膜里，吃光果实、在里头蛹化。
由于跳豆飞蛾并不属于我国的昆虫，农粮局担心引进我国的跳豆里的蛹会化成飞蛾，影响我国和周围国家的生态平衡。很多国家也基于同样原因，禁止跳豆入口。
这些小豆子其实是盛产在中美洲一带的Sebastiana Pavoniana矮灌木的种子,这个植物属于大戟科，藏在这些种子里的是一些拉丁文名称叫做Carpocapsa saltitans的蛾类幼虫，属于卷叶蛾科。
不过，跳豆只能跳两个月。因为虫子随后开始吐丝结茧。再过两个月，虫子就会化作飞蛾，咬破茧子和跳豆飞出来。
每个荚膜里有三瓣心皮，但未必每一瓣心皮都会有蛹寄居。下过第一场春雨后，荚膜里的心皮就会被抛离树身。里头的蛹便能自由弹跳，也就成了俗称的墨西哥跳豆。
大概四五个月，幼虫便能长大成为跳豆飞蛾，然后重复进行繁殖后代的过程~~

❼ 墨西哥跳豆为什么会一直跳

墨西哥跳豆是一种墨西哥灌木的种子，尤指欧洲大戟科（大戟科）灌木的种子，内部含有一种小油蛾的幼虫。取食于种子内部果肉的幼虫的运动由于温度的增加而增强，从而使种子进行跳跃的运动。

所以实际上，使这些豆子跳跃的是一种生活在豆子里的小油蛾幼虫。油蛾在植物的花里产卵，这些卵被并入种子中。然后幼虫吃掉豆子的内部并生活在那里。当幼虫移动时，豆子也会移动。最终，幼虫变成油蛾，从豆子里出来，重复这个循环。因此，我们看到的墨西哥跳豆的内部其实自产生之时已经被掏空了，取而代之的是油蛾幼虫。与其说是墨西哥跳豆在跳，不如说是披着墨西哥跳豆外皮的油蛾幼虫在跳。