How far do pheromone scents travel and how long do they last? Detailed answer

BIG ENCYCLOPEDIA FOR CHILDREN AND ADULTS
Free library / Directory / Big encyclopedia for children and adults

How far do pheromone scents travel and how long do they last? Detailed answer

Big encyclopedia for children and adults

Directory / Big encyclopedia. Questions for quiz and self-education

Did you know?

How far do pheromone scents travel and how long do they last?

Special substances intended for the communication of some animals with others were called "pheromones", or "telergons" (from the Greek words "far" and "action"). With the help of these substances, insects find and recognize each other, attract or repel, give an alarm signal.

The scent of the female attracts males from a distance. Male nun butterflies look for a female at a distance of up to 300 meters, ailanthus saturnia - up to 2,4 kilometers, metal nude (in this butterfly, the image on the wings looks like the Greek letter "nu") - at a distance of 3 kilometers, pear saturnia - up to 8 kilometers.

The record for resistance belongs to the pheromone of the female gypsy moth: in still air, it retains its attracting effect for 970 days.

Author: Kondrashov A.P.

Random interesting fact from the Great Encyclopedia:

What is a sense of balance?

If you've read about human spaceflight, you've probably noticed that one of the problems scientists have to deal with is the loss of balance more and more as the ship moves away from the Earth's gravity. A sense of balance is the body's ability to adapt to different conditions, depending on its position relative to the Earth, which attracts everything that is nearby from it. Without a sense of balance, birds could not fly, people could not walk, and no living creature could navigate in space.

A person has two organs of balance, and they are located in his head next to each ear. Each of these parts is like a sac and is filled with a fluid called lymph. Inside, these sacs are lined with sensory cells with hairs. When the head is in a vertical position, the pressure on the hairs is the same from all sides, and when tilted to one side or another, it changes. At the same time, sensitive cells are irritated and send impulses along the nerve fibers to the brain. And the brain forces certain muscles to work, which bring the body from an inclined position to a correct, vertical one.

Our balance organs also help us to become aware of the direction of our movement. Imagine that we went for a ride in a car. When the car moves forward, our body involuntarily leans back against the back of the seat. Fluid, or lymph, in the "semicircular canals" of the organs of balance deflects sensitive hairs back. As a result, certain nerves with which they are connected send the appropriate signal to the brain - and we begin to feel that we are moving forward.

So, our body deviates back, and at the same time the lymph moves with it. After some time, sensitive hairs take a vertical position, and we cease to feel the movement of our body forward. Now imagine that the driver has applied the brakes. Our body by inertia still continues to move forward, and the lymph also moves in the organs of balance, tilting the hairs forward now. The corresponding impulse is sent to the brain - and we begin to feel that we are stopping.

In each organ of balance there are three semicircular canals, each of which corresponds to three directions of movement in space. The sensory hairs in these channels help us know if we are moving up or down, forward or backward, right or left.

Test your knowledge! Did you know...

▪ What living beings are the oldest on Earth?

▪ In which country do cities differ in the predominant colors of buildings and houses?

▪ What is unique about the English system in the XNUMXth-XNUMXth centuries?

See other articles Section Big encyclopedia. Questions for quiz and self-education.

Read and write useful comments on this article.

<< Back

Latest news of science and technology, new electronics:

Machine for thinning flowers in gardens 02.05.2024

In modern agriculture, technological progress is developing aimed at increasing the efficiency of plant care processes. The innovative Florix flower thinning machine was presented in Italy, designed to optimize the harvesting stage. This tool is equipped with mobile arms, allowing it to be easily adapted to the needs of the garden. The operator can adjust the speed of the thin wires by controlling them from the tractor cab using a joystick. This approach significantly increases the efficiency of the flower thinning process, providing the possibility of individual adjustment to the specific conditions of the garden, as well as the variety and type of fruit grown in it. After testing the Florix machine for two years on various types of fruit, the results were very encouraging. Farmers such as Filiberto Montanari, who has used a Florix machine for several years, have reported a significant reduction in the time and labor required to thin flowers. ... >>

Advanced Infrared Microscope 02.05.2024

Microscopes play an important role in scientific research, allowing scientists to delve into structures and processes invisible to the eye. However, various microscopy methods have their limitations, and among them was the limitation of resolution when using the infrared range. But the latest achievements of Japanese researchers from the University of Tokyo open up new prospects for studying the microworld. Scientists from the University of Tokyo have unveiled a new microscope that will revolutionize the capabilities of infrared microscopy. This advanced instrument allows you to see the internal structures of living bacteria with amazing clarity on the nanometer scale. Typically, mid-infrared microscopes are limited by low resolution, but the latest development from Japanese researchers overcomes these limitations. According to scientists, the developed microscope allows creating images with a resolution of up to 120 nanometers, which is 30 times higher than the resolution of traditional microscopes. ... >>

Air trap for insects 01.05.2024

Agriculture is one of the key sectors of the economy, and pest control is an integral part of this process. A team of scientists from the Indian Council of Agricultural Research-Central Potato Research Institute (ICAR-CPRI), Shimla, has come up with an innovative solution to this problem - a wind-powered insect air trap. This device addresses the shortcomings of traditional pest control methods by providing real-time insect population data. The trap is powered entirely by wind energy, making it an environmentally friendly solution that requires no power. Its unique design allows monitoring of both harmful and beneficial insects, providing a complete overview of the population in any agricultural area. “By assessing target pests at the right time, we can take necessary measures to control both pests and diseases,” says Kapil ... >>

Random news from the Archive

Flash drive 16 GB 13.03.2006

At CeBIT 2006, the Korean company Iocell introduced a 16 GB USB flash drive. To date, this is the most capacious flash drive available on the market.

So far, not much is known about the new device: only that it will be connected to a computer via USB 2.0, which provides good data transfer speed, and that additional drivers are not required for the USB drive to work.

Other interesting news:

▪ Why do people cry

▪ Mobileye EyeQ4 single-chip system for semi-autonomous vehicles

▪ Antibiotics from cannabis

▪ The oldest coral

▪ Light pollution makes it difficult to see the stars

News feed of science and technology, new electronics

Interesting materials of the Free Technical Library:

▪ site section Parameters of radio components. Article selection

▪ article by Alexander Bell. Famous aphorisms

▪ article Why are kangaroos only found in Australia? Detailed answer

▪ article Deputy store manager. Job description

▪ article A three-channel color and music device with the possibility of increasing the number of lamps in each garland. Encyclopedia of radio electronics and electrical engineering

▪ article Guess How Much. Focus Secret

Leave your comment on this article:

All languages of this page

Home page | Library | Articles | Website map | Site Reviews