CN102125018A

CN102125018A - Method for killing vegetable insects with microwave

Info

Publication number: CN102125018A
Application number: CN 201110026996
Authority: CN
Inventors: 倪国旗; 郭义发
Original assignee: PLA GUILIN AIR FORCE COLLEGE
Current assignee: PLA GUILIN AIR FORCE COLLEGE
Priority date: 2011-01-25
Filing date: 2011-01-25
Publication date: 2011-07-20
Anticipated expiration: 2031-01-25
Also published as: CN102125018B

Abstract

The invention relates to a method for killing vegetable insects with microwave, belonging to the field of microwave technology and application. For thousands of years, the problem of crop diseases and insect pests has been a trouble for agricultural workers home and abroad. Moreover, as the volumes and structures of the vegetable insects are different from those of bacteria and generated microwave signals cannot be used universally, an oscillation source for generating microwave signals, a modulation signal and the like all need to be improved. According to different shapes of the vegetable insects, by changing the transmission power and the working frequency range of the oscillation source and the repetition frequency and the pulse width of the modulation signal, a high-frequency pulse signal is obtained to replace pesticide to kill the vegetable insects containing more than 60% of water in vivo without causing pollution so that the crop can grow healthily and soil and ground water are prevented from being polluted by pesticide. Therefore, with the wide application, the method certainly has great significance to the production of green food, environmental protection, improvement of the living standard of people and the like.

Description

Microwave is murdered the method for cabbageworm

Technical field

The present invention relates to a kind of method of murdering cabbageworm, belong to microwave technology and application with microwave.

Background technology

Over the past thousands of years, the damage by disease and insect problem of crops is perplexing China even agriculture personnel in the world always.For desinsection, people's agricultural chemicals of having to use in a large number, and, must use the stronger agricultural chemicals of toxicity again along with the enhancing of pest resistance to insecticide.Scientific research is verified, a large amount of long-time contaminated environment of highly toxic pesticide meeting, harm humans health.Owing to use agricultural chemicals, its residue also can penetrate in soil and the underground water in large quantities, this will be unfavorable to the protection of soil, and if things go on like this, soil and water also can be subjected to serious pesticide pollution, influence agricultural sustainable development and the increasing processing cost to water.

Abroad, the minority military power with headed by the U.S. has worked out the high power microwave weapon model machine, can be used for killing and wounding or killing the combatant, yet there are no report but microwave technology is used for desinsection.Microwave technology is used for sterilization etc. and has been in the practical stage at home, but because volume of insect and structure are followed the inequality of bacterium, killing mechanism has essential distinction, so sterilization technology can not be used for desinsection, so also do not see the report of microwave desinsection technical elements temporarily.

In addition, because inequality with bacterium of the volume of cabbageworm and structure, the microwave signal of generation can not be general, so the oscillation source, modulation signal etc. that are used to produce microwave signal all need to improve.

Summary of the invention

The invention provides a kind of microwave and murder the method for cabbageworm, under the situation that does not have to pollute, can kill cylinder water content, help protecting soil and underground water not to be subjected to the pollution of agricultural chemicals greater than 60% cabbageworm.

Adopt the killing microwave cylinder water content to be greater than the course of work of 60% cabbageworm:

Step 1, according to the difference of cabbageworm kind, determine oscillation source transmitting power, utilize the high-frequency signal frequency that oscillation source produces, the pulsewidth and the repetition rate of modulation signal;

Step 2, utilize oscillation source to produce the high-frequency signal of operating frequency for the x superhigh frequency band;

Step 3, generation pulsewidth are that W, repetition rate are the pulse signal of f, as modulation signal;

Step 4, with the high-frequency signal that the modulation signal in step 3 modulation utilizes oscillation source to produce, produce high-frequency pulse signal; By changing the transmitting power of oscillation source, the peak power that makes the described high-frequency pulse signal of generation is P;

Step 5, the high-frequency pulse signal irradiation vegetables of adopting the step 4 gained, irradiation time is 1-3s;

Wherein, the span of x is 3-6, and the span of W is the 1.5-2.0 microsecond, and the span of f is 3-4KHz, and the span of P is 9-11KW.

Beneficial effect:

1. can reduce or eliminate pollution to environment

This method can replace the agricultural chemicals kill pests, environment is not produced any pollution, makes crops energy healthy growth.Therefore, along with the extensive use of this device, it will all have very significant meaning to the production of pollution-free food, the protection of environment, the raising of living standards of the people etc.

2. can remove pollution to soil

Traditional agricultural insecticide method is owing to use agricultural chemicals in large quantities; its residue also can penetrate in soil and the underground water, and this will be unfavorable to the protection of soil, if things go on like this; soil and water also can be subjected to serious pesticide pollution, influence agricultural sustainable development and the increasing processing cost to water.This microwave desinsection method helps protecting soil and underground water not to be subjected to pollutions such as agricultural chemicals then without any pollution.

3. can improve the agricultural products in China quality, widen the exit passageway of agricultural products in China

The agricultural product quality of China still is all unlike any one country is poor in the world on the characteristic, but the agricultural product of China can not be gone abroad, most important reason is exactly that persticide residue in the crops of China is very big, do not meet the international hygiene standard, if we can be without agricultural insecticide, to this phenomenon can not occur, the export of farm produce passage of China will be wideer so.

4. an emerging industry can be born

If this disinsection method can be promoted in China, can replace industries such as agricultural chemicals and pollution-free food production, form an emerging industry, provide certain help to social employment etc.

In a word, along with the continuous popularization of this device, will produce epoch-making influence to the agricultural of China.

Embodiment

Before applied microwave is killed cabbageworm, studied the influence of the principle of killing microwave cabbageworm and microwave earlier for plant, people.

One, killing microwave cabbageworm principle

According to High-Power Microwave (PHM) biological effect theory, the fuel factor of certain wave band arrowband microwave and field-effect have very strong wounding effect to biological cell and nervous system.By microwave theory and experimental results show that, the natural mode shape of hydrone and certain wave band wavelength are that the microwave frequency of centimeter wave is close, can absorb 98% of microwave energy, it is more that the tissue that dielectric constant is bigger absorbs microwave, the dielectric constant of water is big, produce a large amount of heat energy formation fuel factors at most so be imbued with the tissue absorption microwave energy of moisture, cause that tissue temperature sharply raises, thereby make insect dead by " burning ".

Two, microwave is to the influence of plant

Because the cabbageworm quality is little, only need the microwave power of every square centimeter of milliwatt level can put its death, biological in addition obviously different with contained material constituent with the structure of plant, so its microwave biological effect is visibly different under the equal-wattage situation.To plant, as long as be no more than the threshold values that the plant health growth can bear, plant is can not be subjected to any injury to microwave, more can not produce genetic mutation as a kind of physical energy irradiation that is similar to solar energy, and this point is confirmed by many scholars' experiment.

The present invention promptly is based on above 2 methods that begin to further investigate a kind of killing microwave cabbageworm, utilizes for 5 years carried out the research of the following aspects:

1. studied the oscillation source working frequency range to killing the influence of cabbageworm effect, utilize the microwave of different wave lengths such as metric wave, decimetric wave, centimeter wave to experimentize respectively, find when oscillation source be that working frequency range is when being the high-frequency signal of 3cm wave band, greater than 60% cabbageworm, kill the cabbageworm best results for water content.

2. the modulation waveform of having studied oscillation source is to killing the influence of cabbageworm effect, respectively waveforms such as continuous wave, square wave, impulse wave, triangular wave are tested, find when modulation waveform is impulse waveform, and working as pulsewidth is 1.5～2.0 microseconds, and repetition frequency range obtains best insecticidal effect when being 3～4KHz.

3. the pulse peak power size of research microwave signal is to killing the influence of cabbageworm effect, by invertebrates such as blue or green worm are tested for hundreds of times, the death time of animal and the relation between microwave output power, particularly and the corresponding relation between the peak power have been grasped, also found the greatest differences of identical mean power and different peak power microwave biological effects, and both are non linear relation, and its relation curve is very steep.And find when the pulse peak power scope of microwave signal is 9～11KW, kill the cabbageworm best results, and microwave irradiating time to be that 1～3s can kill cabbageworm.

5. the body of research cabbageworm is to the influence of killing effect

At the difference of cabbageworm body, change the transmitting power of repetition rate, pulse width and the oscillation source of modulation signal, realize optimum efficiency.The body of animal is long directly to have influence on the absorption ratio of animal to microwave with microwave wavelength, directly has influence on death time of animal.

In a word, the power output of microwave, wavelength, modulation waveform, repetition rate etc. are the principal elements of decision invertebrate death, and by every result of study, we can obtain adopting the killing microwave water content greater than the course of work of 60% cabbageworm to be:

Wherein, the span of x is 3-6, and the span of W is the 1.5-2.0 microsecond, and the span of f is 3-4KHz, and the span of P is 9-11KW.In different seasons, have different cabbageworms in the vegetable field and spread unchecked, with respect to different cabbageworms, above-mentioned parameter is different, by setting particular value, can reach best killing effect.

Claims

1. the method for a killing microwave cabbageworm is characterized in that, the method at cylinder water content greater than 60% cabbageworm,

The course of work of this method is:

Step 4, with the high-frequency signal that the modulation signal in step 3 modulation utilizes oscillation source to produce, produce high-frequency pulse signal; By the transmitting power of control oscillation source, the peak power that makes the described high-frequency pulse signal of generation is P;