CN108142389A - The method for trapping rice leaf roller using the three compound wave bands of LED monochromatic light - Google Patents

Abstract

The invention discloses a method for trapping rice leaf rollers by using three LED monochromatic light composite bands, belonging to the field of agricultural technology. The LED illuminator adopted in the method emits light waves of three LED monochromatic light composite bands of 380+400+500nm and 380+420+430nm. The above-mentioned method of trapping rice leaf rollers with three LED monochromatic light compound bands found that the effective monochromatic light band range for trapping rice leaf rollers was concentrated at 360‑520nm; the trapping effect was significantly better than that of the control Two three-LED monochromatic light combinations of 380nm light source are 380+400+500nm and 380+420+430nm; The scheme has low cost, is easy to implement, and is convenient for application and promotion in production in the future.

Description

A method of trapping rice leaf rollers using three LED monochromatic light composite bands

technical field

The invention belongs to the technical field of agriculture, and specifically relates to a method for trapping rice leaf rollers by using three LED monochromatic light composite bands.

Background technique

Rice is one of the most important food crops in the world. More than half of the world's population uses rice as a staple food. At the same time, it is also the main food in my country and plays a decisive role in ensuring food security. Rice leaf roller is an important pest of rice in my country, which has caused serious losses to rice production in my country.

In the comprehensive control of rice leaf roller, the proportion of chemical control is very large, and even once became the main means of control. With the increasing use of pesticides, the problems of environmental pollution, pesticide residues in rice and the growth of pest resistance have become increasingly prominent. However, with people's attention to these issues, the concept of ecological prevention and control by using chemical pesticides appropriately and adding biological control, physical control and other means is gradually improving. Accurate prediction and forecast of pest occurrence dynamics is an important content of integrated pest control. The dynamics of pests under the lights obtained through forecasting lights is one of the important means of pest forecasting and forecasting. From the peak days and numbers of adults on lights, compared with the corresponding data in previous years, it is possible to predict the peak of egg hatching of the next generation, the peak of larva damage and the corresponding The degree of occurrence provides a basis for precise chemical control, increases the control effect, and reduces the use of pesticides; at the same time, light trapping is also an effective means of physical control of rice leaf rollers.

At present, the wavelength band of lamp lures for Lepidoptera pests is basically between 360nm and 420nm, and it has gradually become known in the field. But the problem is that the incandescent lamps (visible light range) and black light lamps (ultraviolet to ultraviolet light range) mainly used in production are not effective in trapping rice leaf rollers. The use of forecasting lamps can only be used as an auxiliary means. Moth catching in the field has become the main method of forecasting and forecasting, which has to increase personnel input and workload, which is time-consuming and labor-intensive. In view of the light source mainly used in production, the light source in other bands is not effective in trapping longitudinal rolls, and it does not involve the current situation of the use of composite bands. The monochromatic light and its composite light produced by LED emitters with very mature technology are used at present. Research on the trapping effect of rice leaf rollers will provide a basis for improving the trapping efficiency of target pests and more accurate forecasting.

Contents of the invention

In view of the above-mentioned problems existing in the prior art, the purpose of the present invention is to design a technical scheme of a method for trapping rice leaf rollers using three LED monochromatic light compound bands, which expands the monochromatic method for effectively trapping rice leaf rollers. The light range and compound wave band increase the trapping effect, provide the basis for the subsequent specific trapping of pests, reduce the broad-spectrum trapping of non-target pests, and provide a better effect of compound wave band trapping experiments.

The method for trapping rice leaf rollers by using three LED monochromatic light compound bands is characterized in that the LED illuminator used in the method emits light waves with three LED monochromatic light compound bands of 380+400+500nm.

The method for trapping rice leaf rollers by using three LED monochromatic light compound bands is characterized in that the LED illuminator used in the method emits light waves with three LED monochromatic light compound bands of 380+420+430nm.

Any of the methods for trapping rice leaf rollers by using the composite band of three LED monochromatic lights is characterized in that the light sources of forecasting lights with different specifications are made according to the different wavelengths of the composite band light sources of the three LED monochromatic lights.

The present invention aims at the problem that light sources such as incandescent lamps and black light lamps currently used in production are generally not effective in trapping rice leaf rollers. The monochromatic light source generated by the LED light source is used to expand the screening range, and a multi-channel indoor screening device is adopted. From 360nm to 740nm, multiple monochromatic lights with a wavelength range of 20nm were selected to conduct indoor trapping tests for rice leaf rollers, and to find new monochromatic lights with better trapping effects on rice leaf rollers. On this basis, 5 monochromatic lights were screened out, and then combined with 380/400/420nm monochromatic lights for three LED monochromatic lights, 5 groups were selected. There are more than 200 test insects in each batch of tests, repeated more than 8 times, to ensure the number of test insects used in the test and the number of test repetitions.

The above-mentioned method of trapping rice leaf rollers with three LED monochromatic light compound bands found that the effective monochromatic light bands for trapping rice leaf rollers were concentrated in the range of 360-520nm; the screening effect was significantly better than that of the control Two three-LED monochromatic light combinations of 380nm light source are 380+400+500nm and 380+420+430nm; The scheme has low cost, is easy to implement, and is convenient for application and promotion in production in the future.

Detailed ways

The present invention will be further described below in conjunction with specific examples.

1.1 Source of tested insects

The source of adult rice rollers is the field population of the Fuyang Experimental Base of the China Rice Research Institute, which is collected daily from the field by artificial nets. The trial was conducted between July and September 2016-2017.

1.2 LED light source

The light source is 15 kinds of monochromatic LED lamps with different wavelength bands purchased in the market. 545nm, 570nm (green light), 590nm (yellow light), 610nm (orange light), 630nm, 740nm (red light), and 5 combinations of double monochromatic light according to requirements. The specification of each light source is 5V12W.

1.3 Behavioral response box for rice leaf roller

A 16-channel test device is used, and its behavioral reaction box is a cylindrical reaction box. 16 holes are opened at a distance of 30cm from the bottom to connect PVC pipes. One end is installed with an outward suction fan, and a mesh bag is placed above the fan to collect rice leaf rollers. The T-shaped tube is uniformly perforated and covered with gauze to reduce negative pressure interference in the test instrument. At the same time, in order to avoid mutual interference between different light sources, the cylindrical box is completely covered with black cloth (to reduce the diffuse reflection of light inside the box) and a 40cm high ring is set (to avoid direct influence between light sources).

1.4 Test method

In the test, 15 monochromatic lights, plus 1 dark control. The 16 channels are randomly arranged in different bands.

On the basis of the single-band test results, the three-band combination is carried out, and the 380nm band and white light source are added as references in the 16-channel selection test.

Take out the adult rice leaf rollers before sunset on the day of the test, put them into the reaction box at 10:00 p.m., and treat them in the dark for half an hour to ensure that the compound eyes of the test insects are consistent. Time 10h) Check the sex and quantity of adults in the mesh bag corresponding to the light sources of each band. Make sure that the number of test insects in each batch is more than 200.

DPS software was used to conduct multiple comparison analysis for the total light-attraction rate of each band.

2 Results: The test results are shown in Table 1 and Table 2.

Table 1 The trapping efficiency of 15 monochromatic light bands to rice leaf roller

serial number Monochromatic light wavelength nm Average % of total photoresponse rate standard deviation 5% level multiple comparison results 1 360 2.09 1.21 bc 2 380 5.54 1.87 a 3 400 4.11 2.72 ab 4 420 4.52 2.83 ab 5 430 3.19 2.93 abc 6 450 2.34 3.71 bc 7 460 2.87 1.31 abc 8 500 4.81 6.93 abc 9 520 3.80 4.05 abc 10 545 1.81 2.82 cd 11 570 0.45 0.84 de 12 590 0.37 0.81 de 13 610 0.09 0.15 e 14 630 0.13 0.35 e 15 740 0.03 0.06 e 16 dark contrast 0.06 0.13 e

Note: The test was repeated 8 times, and the number of insects tested each time was more than 200; in order to facilitate multiple comparisons, all values of 0 were replaced with 0.01 during calculation. The same below.

Table 2 The trapping efficiency of five three-LED monochromatic light combinations on rice leaf roller

serial number monochromatic light combination nm Average % of total photoresponse rate standard deviation 5% level multiple comparison results 1 380+420+500 3.72 2.02 bc 2 380+400+500 6.61 2.92 a 3 380+400+430 5.30 4.68 bc 4 380+400+420 2.83 2.84 c 5 380+420+430 5.36 2.49 ab 6 380 3.34 3.05 c 7 dark contrast 0.01 0.00 e 8 white light 0.94 1.94 d

Note: The experiment was repeated 22 times.

Table 1 shows the multiple comparison results of 15 monochromatic lights on the trapping efficiency of the rice leaf roller. From the results, 380nm performed well, and the single-band trapping rate was 5.54%, and there was no significant difference between the 5 bands of 400/420/450/460/500nm. The trapping efficiency of the 545nm band was 0.45%, and the trapping efficiency of the 5 bands after 545nm was between 0.03% and 0.37%, which was comparable to the trapping rate of the dark control. That is: the monochromatic light with good trapping effect on rice leaf roller is concentrated in the range of 360-520nm, but the trapping effect of a single monochromatic light source is average.

It can be seen from Table 1 and Table 2 that after adding dual-band composite light, the trapping efficiency of 380nm monochromatic light with good single-band effect in the 16-channel screening device dropped from 5.54% to 3.34%, indicating that the trapping efficiency of the composite-band overall The effect is higher than that of monochromatic light. As can be seen from Table 2, comparing the effect of the composite band light source with the incandescent lamp and black light lamp mainly used in production (represented by white light and 380nm light source in the test), among the five three-LED monochromatic light combinations, 380+400 The combined effect of +500nm and 380+420+430nm is significantly better than that of the control light source. The effect of the other three three-band combinations has no significant difference from the 380nm control, but is significantly better than the white light control. It shows that the three monochromatic light combinations are not random, and the combination effects of 380+400+500nm and 380+420+430nm are significantly better than the effects of incandescent lamps and black light lamps mainly used in production.

Claims (3)

1. The method for trapping rice leaf rollers with three LED monochromatic light compound bands is characterized in that the LED illuminator used in the method emits light waves with three LED monochromatic light compound bands of 380+400+500nm. 2. A method for trapping rice leaf rollers using three LED monochromatic light compound bands, characterized in that the LED illuminator used in the method emits light waves with three LED monochromatic light compound bands of 380+420+430nm. 3. as any method in claim 1-2 adopting three LED monochromatic light composite wavebands to lure rice leaf roller, it is characterized in that according to the different wavelengths of the three LED monochromatic light composite waveband light sources, different specifications of forecasting are made light source.