Setaria italica L. Beauv. Nematode control method based on seed period

Abstract

The invention belongs to the technical field of millet nematode prevention and control, and particularly relates to a millet nematode prevention and control method based on a grain seed period, which comprises the following steps: S1, putting millet seeds into a nematicide; s2, then the seeds are taken out and covered; s3, putting the stuffed seeds into a gelatinous coating agent, uniformly stirring, and then scattering the seeds together with the coating agent into the seeding furrows; wherein the nematicide is prepared from fluopyram with the concentration of 0.15 to 0.3 percent, millet plant ash with the concentration of 1 percent and brassinolide with the concentration of 3 percent. The nematicide formed by compounding the fluopyram, the millet plant ash and the brassinolide is used for closing the millet seeds, and the nematode control rate reaches 90% or above.

Description

Technical Field

[0001] The invention belongs to the technical field of millet nematode control, and particularly relates to a millet nematode control method based on the millet seed stage. Background Art

[0003] Millet nematode disease, also known as purple spike disease or greening, is caused by infection by Aphelenchoides besseyi. It is mainly transmitted through diseased seeds, soil and manure. In the early stage of infection, the nematodes mainly parasitize the underground part of the plant, and gradually migrate to the above-ground part as the plant grows, infecting the floral organs and ovary, affecting the development of the spike, and causing a large reduction in millet yield.

[0004] At present, there are more than 400 nematicide products effectively registered in my country, but there is no nematicide product specifically registered for millet. Some researchers have explored the use of agents such as acephate or phoxim to treat millet seeds to control millet nematode disease, but the overall control effect is average. Summary of the invention

[0005] In order to solve the problems existing in the above-mentioned prior art, the present invention provides a method for controlling millet nematodes based on the seeding period, by using a nematicide formed by a compound of fluopyram, millet wood ash and brassinolide to suffocate millet seeds, and the nematode control rate is as high as over 90%.

[0006] The specific technical solution adopted by the present invention is:

[0007] A method for controlling millet nematodes based on the millet seed stage comprises the following steps:

[0008] S1. Put the nematicide into water and mix it thoroughly;

[0009] S2, then put the millet seeds into the nematicide, mix well and then sow them;

[0010] S3, putting the soaked seeds into the gelatinous coating agent and stirring evenly, and then scattering the seeds together with the coating agent into the sowing furrow;

[0011] The nematicides include fluopyram with a concentration of 0.15-0.3%, millet ash with a concentration of 0.8-1.2% and brassinolide with a concentration of 2-4%.

[0012] Furthermore, the nematicide comprises 0.2% fluopyram, 1% millet ash and 3% brassinolide.

[0013] Furthermore, the sowing time in step S2 is 2-6 hours.

[0014] Furthermore, the coating agent in step S3 comprises, by weight, 10-20 parts of carboxymethyl cellulose, 5-10 parts of carboxymethyl chitosan, and 20-30 parts of straw powder.

[0015] Furthermore, the preparation method of the coating agent comprises the following steps:

[0016] A. Soak the straw powder in nematicide diluted 10-15 times;

[0017] B. Take out the soaked straw powder, then add carboxymethyl cellulose, carboxymethyl chitosan, straw powder and water into containers respectively, and stir evenly to form a gel-like coating agent.

[0018] The beneficial effects of the present invention are:

[0019] 1. The nematode control rate of the millet nematode control method of the present invention is as high as over 90%, and the germination rate is as high as over 95%. Not only does the nematode control rate far exceed the control effect of existing nematicides on millet, but the damage to the millet itself is small.

[0020] Fluopyram and brassinolide in the present invention are both green, environmentally friendly and low-toxic agents that can meet the need for environmental safety. Millet wood ash is not only non-toxic but also rich in mineral elements, which can improve soil fertility and promote millet growth.

[0021] In the present invention, fluopyram, millet ash and brassinolide produce a synergistic effect, and the control effect of the three combined against nematodes far exceeds the control effect of fluopyram alone.

[0022] 2. The control method of the present invention kills the nematodes carried by millet during the millet planting period to avoid the reproduction and spread of the nematodes, thereby controlling the nematode disease of millet from the source.

[0023] 3. The coating agent of the present invention forms a gel-like protective shell on the outside of the seeds, which not only hinders the invasion of external nematodes, but also prevents the nematodes that have not been eliminated inside the seeds from drilling out, making the nematode disease between adjacent millets less likely to be transmitted, thereby achieving the effect of nematode control.

[0024] In addition, the coating also has a sustained-release effect, which can continuously release the diluted nematicide adsorbed by the straw powder, thereby achieving a long-term effect of nematode control on millet. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 Field photo 1 showing the effect of millet nematode control;

[0026] Figure 2 Field photo 2 showing the effect of controlling millet nematode disease. DETAILED DESCRIPTION

[0027] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments: 1. Specific embodiments

[0029] Example 1

[0030] S1. Put the nematicide into water and mix it thoroughly;

[0031] S2, then put the millet seeds into the nematicide, mix well and keep them in a humidified state for 4 hours;

[0032] S3, putting the soaked seeds into the gelatinous coating agent and stirring evenly, and then burying the seeds together with the coating agent into the sowing ditch;

[0033] The nematicides include 0.15% fluopyram, 1% millet ash and 3% brassinolide.

[0034] Example 2

[0035] The difference between Example 2 and Example 1 is only the different ratio of the nematicide. The nematicide in Example 2 includes 0.2% fluopyram, 1% millet ash and 3% brassinolide, as shown in Table 1.

[0036] Example 3

[0037] The difference between Example 3 and Example 1 is only the different ratio of the nematicide. The nematicide in Example 3 includes 0.25% fluopyram, 1% millet ash and 3% brassinolide, as shown in Table 1.

[0038] Example 4

[0039] The difference between Example 4 and Example 1 is only the different ratio of the nematicide. The nematicide in Example 4 includes 0.3% fluopyram, 1% millet ash and 3% brassinolide, as shown in Table 1.

[0040] Example 5

[0041] The only difference between Example 5 and Example 2 is that in Example 5, the seeds treated with the nematicide are directly placed in the coating agent without being steamed.

[0042] Example 6

[0043] The difference between Example 5 and Example 2 is only the sowing time. The sowing time of seeds in Example 6 is 2 hours, as shown in Table 1.

[0044] Example 7

[0045] The difference between Example 7 and Example 2 is only the sowing time. The sowing time of seeds in Example 7 is 6 hours, as shown in Table 1.

[0046] Comparative Example 1

[0047] The difference between Comparative Example 1 and Example 2 is that the ingredients of the nematicide are different. The nematicide in Comparative Example 1 does not contain millet ash. See Table 1 for details.

[0048] Comparative Example 2

[0049] The difference between Comparative Example 2 and Example 2 is only that the ingredients of the nematicide are different. The nematicide in Comparative Example 2 does not contain brassinolide, as shown in Table 1.

[0050] Comparative Example 3

[0051] The difference between Comparative Example 3 and Example 2 is that in Comparative Example 3, the seeds are not coated, and the seeds after being soaked are directly sown.

[0052] 2. Prevention and Control Experiment

[0053] A plurality of experimental fields were divided in the experimental field and isolated from each other. The same batch of millet seeds were taken and the seeds were treated by the methods of the initial group, Examples 1-7 and Comparative Examples 1-3, respectively. Then, each group of seeds was sown in a separate experimental field, and the same field management parameters were used during the planting period, such as fertilizer application amount, irrigation amount, etc.

[0054] During the planting period, the growth of millet in each experimental field was observed, and the nematode control rate and germination rate were calculated. The results are shown in Table 1 and Figure 1-2 ,in Figure 1 and Figure 2 The treatment group is Example 2, and the control group is the initial group.

[0055] Table 1

[0056]

[0057] From Table 1 and Figure 1-2 It can be seen that the method of the present invention can effectively improve the nematode control rate of millet by treating millet. After using a suitable formula of nematicide and coating treatment, the nematode control rate of millet is as high as more than 90%, and the germination rate is as high as more than 95%.

[0058] In the initial group, no nematicide was used for treatment. Figure 1-2 Purple spikes are clearly seen in the middle.

[0059] In Comparative Example 3, since no coating treatment was performed, the nematicide could not be effective after the millet grew for a period of time due to volatilization, causing the nematodes in the soil to invade the millet again, resulting in a low nematode control rate in Comparative Example 3.

Claims

1. A method for controlling millet nematodes during the millet seed period, characterized in that: The following steps are involved: S1. Put the nematicide into water and mix it thoroughly; S2, then put the millet seeds into the nematicide, mix well and then sow them; S3, putting the soaked seeds into the gelatinous coating agent and stirring evenly, and then scattering the seeds together with the coating agent into the sowing furrow; The nematicides include fluopyram with a concentration of 0.15-0.3%, millet ash with a concentration of 0.8-1.2% and brassinolide with a concentration of 2-4%.

2. The method for controlling millet nematodes based on the seed stage of millet according to claim 1, characterized in that: The nematicide comprises fluopyram at a concentration of 0.2%, millet ash at 1% and brassinolide at 3%.

3. The method for controlling millet nematodes based on the seed stage of millet according to claim 1, characterized in that: The sowing time in step S2 is 2-6 hours.

4. The method for controlling millet nematodes based on the seed stage of millet according to claim 1, characterized in that: The coating agent in step S3 comprises, by weight, 10-20 parts of carboxymethyl cellulose, 5-10 parts of carboxymethyl chitosan, and 20-30 parts of straw powder.

5. The method for controlling millet nematodes based on the seed stage of millet according to claim 4, characterized in that: The preparation method of the coating agent comprises the following steps: A. Soak the straw powder in nematicide diluted 10-15 times; B. Take out the soaked straw powder, then add carboxymethyl cellulose, carboxymethyl chitosan, straw powder and water into containers respectively, and stir evenly to form a gel-like coating agent.

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