CN101147478B - Method for killing plant pests by centimeter wave temperature control heat - Google Patents

Abstract

The present invention belongs to the field of agricultural environment-protecting type pests-killing technology. In the concrete, it relates to a method for killing plant pests by adopting high-power centimeter wave temperature-controlled heat. It is characterized y that said invention adopts a high-power centimeter wave emitting system to orientably emit centimeter wave to directly radiate plants, in which the frequency of radiation is at least twice, and the frequency range of said centimeter wave is 10-35 GHz.

Description

Method for killing plant pests by centimeter wave temperature control heat

technical field

The invention belongs to the technical field of agricultural and environment-friendly pest killing, and in particular relates to a method for killing plant pests with high-power centimeter-wave temperature-controlled heat. the

Background technique

According to the analysis of the reasons for the continuous development of my country's biological control technology by the Chinese Academy of Sciences, at present, my country needs to use 300,000 tons of pesticides worth 9 billion yuan each year to eliminate crop pests with an area of tens of millions of hectares. Such a large amount of pesticides actually exerts an insecticidal effect Only 5% of the pesticides are lost, and more than 95% of the pesticides are lost to the air, soil, and waters, causing large-scale environmental pollution and seriously affecting the quality of my country's agricultural, livestock, and aquatic products. The gradual accumulation of pesticides into the human body is the cause of many difficult diseases important cause. the

Since the mid-1980s, the focus of pest control has been on the use of natural enemies to control pests, but there are still many natural enemies that are too narrow to adapt to the environment, more sensitive to pesticides than pests, or too slow to control pests. Play an important role in sustainable pest control. Extensive use of pesticides to eliminate pests has also resulted in the death of the natural enemies of the pests, disrupted the ecological balance, made the secondary pests rise to the main pests, and exacerbated the frequency of pest disasters. However, the use of natural enemies to control insect pests has limited efficiency, and the research progress of insect-resistant transgenic plants is far from meeting the current requirements for killing insect pests. For this reason, the International Food and Agriculture Organization is actively calling for the development of new, effective, safe and non-polluting pest control technologies to deal with global pest disasters. The present invention is an environment-friendly pest killing method

The thermal effect of microwaves can cause metabolic disorders of organisms, rapid evaporation of water, denaturation of proteins, etc., so as to achieve the effect of rapid insecticide. Microwave heating has the characteristics of strong penetrating power, small thermal inertia, strong selectivity, fast speed, and no pollution. Therefore, the microwave thermal effect is applied to inspection and quarantine, pest control, sterilization of archival materials, grain storage, food processing and sterilization. Bacteria, bamboo drying and insecticide and many other aspects. the

Regarding the patent application for microwave insecticide, the Chinese patent "A Microwave Electromagnetic Field Radiation Energy Insecticide (Patent No. 01273962.6)" announced in 2003 uses a microwave frequency of 915-2450MHz. The penetration depth is relatively large (greater than 1cm), and the size of pest larvae is on the order of mm, so the insecticidal effect of using this frequency range is not good. In addition, the mechanism of killing pests is the electromagnetic wave biothermal effect, that is, the individual pests absorb microwave energy and cause their body temperature to rise rapidly and die. Vegetables and crops also contain a lot of water, and the irradiation process also absorbs a lot of energy and the temperature rises , thereby causing damage or even death to crops, etc., so the device and method are not suitable for killing pests in plants. The Chinese patent "Microwave Weeding and Sterilization Method and Microwave Weeding and Pesticide Sterilization Machine (Patent No. 02129628.6)" announced in 2003, integrates weeding, insecticide and sterilization. Although it kills pests, it also damages green areas such as lawns. Plants are therefore also not suitable for killing pests in plants, only suitable for killing pest larvae and eggs and seeds of weeds in the soil before the crops are cultivated. the

Contents of the invention

The object of the present invention is to provide a method for killing plant pests with high-power centimeter-wave temperature control and heat for the above-mentioned deficiencies in the prior art. Plant damage is minimized while eliminating pests, so that it can recover in a short time. While protecting the environment and ensuring the safety of personnel, there is no residue. the

The realization of the object of the present invention is accomplished by the following technical solutions:

A method for killing plant pests with high-power centimeter-wave temperature control and heat, characterized in that the method adopts a high-power centimeter-wave emitting system to directional emit centimeter-waves to directly irradiate plants, wherein the number of times of irradiation is at least two, and the emitted The frequency range of centimeter waves is 10-35GHz. the

For each irradiation, when the surface temperature of the plant reaches 50-60°C, the irradiation is stopped. the

The time interval between the at least two irradiations is 5-15 seconds. the

The advantage of the present invention is that the high-power centimeter wave can quickly kill pests in a very short period of time without obvious impact on the surrounding environment, and has the least damage to plants. Compared with chemical pesticides for disinsection, it has the following advantages: Advantages: environmental protection, reusable, fast, efficient, and low cost because it only consumes electric energy, easy to use and operate, and has broad-spectrum insecticidal ability. the

Description of drawings

Accompanying drawing 1 implementation schematic diagram of the embodiment of the present invention;

Detailed ways

The features of the present invention and other relevant features are described in further detail below in conjunction with the accompanying drawings through the embodiments, so as to facilitate the understanding of those skilled in the art:

As shown in Figure 1, the symbols 1-10 in the figure respectively represent: centimeter wave transmitting system 1, high voltage indicator and adjustment knob 2, current indicator 3, power adjustment knob 4, centimeter wave transmitting switch 5, waveguide 6, horn antenna 7. Electromagnetic waves 8. Lawns 9. Pests in lawns 10. the

Embodiment is used for lawn desinsection concrete operating steps are as follows:

The first step is to establish a centimeter-wave radiation system (including the setting of non-contact temperature measurement equipment), and appropriately select the system frequency of 10-35GHz according to the size of the pest;

The second step is to turn on the power supply of the centimeter wave radiation system, adjust the adjustment knob 2 and the power adjustment knob 4, turn on the centimeter wave emission switch 5, and directional emit centimeter waves to directly irradiate the lawn, while monitoring the temperature change of the lawn;

Step 3 When the temperature of the lawn reaches 50-60°C, turn off the centimeter wave emission switch 5 and stop the irradiation;

The fourth step is to turn on the centimeter wave emission switch 5 again after 5-20s, and directional emit centimeter waves to directly irradiate the lawn, and the temperature of the lawn reaches 50-60°C again;

The fifth step is to irradiate 1-2 times at such intervals, and the irradiation ends. the

This process can at least make the death rate of pests in the lawn reach more than 80%, while the damage rate of the lawn reaches less than 30% and can be restored. the

The specific effect is as follows:

Example 1:

Start the centimeter wave emission system, adjust its output power, and emit centimeter waves. At the same time, use an infrared thermometer to remotely measure the surface temperature of the lawn at the irradiation place. When the surface temperature of the lawn reaches about 55°C, stop the irradiation, and emit centimeter waves again after 10s. The infrared thermometer measures the surface temperature of the lawn at the irradiation place, and the irradiation ends when the surface temperature of the lawn reaches about 55°C again. When this operation process is completed, the mortality rate of the pests on the lawn reaches 95%. The damage was 22%, and the lawn was completely recovered 7 days after irradiation. the

Example 2:

Start the centimeter wave emission system, adjust its output power, emit centimeter waves, and use an infrared thermometer to remotely measure the surface temperature of the irradiated lawn. When the surface temperature of the lawn reaches about 50°C, stop the irradiation, and emit centimeter waves again after 10s. The infrared thermometer measures the surface temperature of the lawn at the irradiation place, and the irradiation ends when the surface temperature of the lawn reaches about 50°C again. When this operation process is completed, the mortality rate of the pests on the lawn reaches 80%. The damage was 12%, and the turf fully recovered 5 days after irradiation. the

Example 3:

Start the centimeter-wave emission system, adjust its output power, and emit centimeter waves. At the same time, use an infrared thermometer to measure the surface temperature of the lawn at the irradiation place remotely. When the surface temperature of the lawn reaches about 60°C, stop the irradiation. When this operation process is completed , the mortality rate of pests on the lawn reached 86%, while the observation found that the lawn damage was 9.5%, and the lawn completely recovered 15 days after irradiation. the

The foregoing examples illustrate the operation and effects of turf surfaces reaching different temperatures during irradiation. In specific applications, the temperature and irradiation intervals can be appropriately adjusted according to changes in different environments (such as wind speed, temperature, etc.), so as to achieve effective insecticide without seriously damaging the lawn. the

Practice has proved that the use of f=10-35GHz microwaves has a good insecticidal effect. The emission frequency of the centimeter wave can be selected according to the size of the insect body: for a larger insect body, a lower frequency can be selected; for a smaller insect body, a higher frequency can be selected. the

Claims (2)

1. the method for a centimeter wave temperature controlling heat killing plant insect, it is characterized in that this method adopts centimeter wave emission system directional transmissions to go out the direct irradiation plant of centimeter wave, wherein the number of times of irradiation is at least secondary, the frequency range of the centimeter wave of being launched is 10-35GHz, each irradiation, when the plant surface temperature reaches 50-60 ℃, stop irradiation.

2. the method for a kind of centimeter wave temperature controlling heat killing plant insect according to claim 1 is characterized in that, the time interval between described at least twice irradiation is 5-15 second.

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