A millet nematode control method based on millet seeding period

Abstract

The present application belongs to the technical field of millet nematode control, and particularly relates to a millet nematode control method based on millet seeding, comprising the following steps: S1, putting millet seeds into a nematocide; S2, then taking out the seeds and carrying out seed soaking; S3, putting the seed-soaked seeds into a gel-like coating agent and stirring uniformly, and then scattering the seeds together with the coating agent into a seeding ditch; wherein the nematocide comprises flupyradifurone with a concentration of 0.15-0.3%, 1% millet wood ash and 3% brassinolide. The present application carries out seed soaking on millet seeds by using the nematocide formed by compounding flupyradifurone, millet wood ash and brassinolide, and the nematode control rate is as high as 90% or more.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of millet nematode control, and particularly relates to a millet nematode control method based on millet seeding. BACKGROUND

[0002] Millet nematode disease, also known as purple spike disease or upside-down green, is caused by the infection of Aphelenchoides besseyi and mainly relies on diseased seeds for transmission. Soil and manure can also transmit the disease. In the early stage of the disease, nematodes mainly parasitize the underground part of the plant, and gradually migrate to the aboveground part with the growth of the plant, infect the flower organ and ovary, affect the development of the ear part, and cause a large reduction in millet yield.

[0003] At present, there are more than 400 registered nematicide products in China, but there is no nematicide product registered for millet. Some researchers have explored the use of acephate or phoxim to treat millet seeds to control millet nematode disease, but the overall control effect is general. SUMMARY

[0004] In order to solve the problems existing in the prior art, the application provides a millet nematode control method based on millet seeding, which uses a nematicide formed by compounding fluopyram, millet wood ash and brassinolide to soak millet seeds, and the nematode control rate is as high as 90% or more.

[0005] The specific technical scheme adopted by the application is as follows:

[0006] A millet nematode control method based on millet seeding, comprising the following steps:

[0007] S1, placing the nematicide in water and mixing thoroughly;

[0008] S2, then placing millet seeds in the nematicide and mixing to soak the seeds;

[0009] S3, placing the soaked seeds in a gelatinous coating agent and stirring uniformly, and then placing the seeds and the coating agent together into a seeding trench;

[0010] The nematicide comprises fluopyram with a concentration of 0.15-0.3%, 0.8-1.2% millet wood ash and 2-4% brassinolide.

[0011] Further, the nematicide comprises fluopyram with a concentration of 0.2%, 1% millet wood ash and 3% brassinolide.

[0012] Further, the soaking time in step S2 is 2-6h.

[0013] Further, the coating agent in step S3 comprises 10-20 parts of carboxymethyl cellulose, 5-10 parts of carboxymethyl chitosan and 20-30 parts of straw powder by mass fraction.

[0014] Further, the preparation method of the coating agent comprises the following steps:

[0015] A, soaking the straw powder in the diluted 10-15 times of nematocide;

[0016] B, taking out the soaked straw powder, then adding carboxymethyl cellulose, carboxymethyl chitosan, straw powder and water into the container respectively, and stirring uniformly to form a gelatinous coating agent.

[0017] The beneficial effects of the present application are:

[0018] 1, the nematode control rate of the millet nematode control method in the present application is as high as 90% or more, and the germination rate is as high as 95% or more, not only the nematode control rate is far higher than the existing nematocide control effect on millet, but also the damage to millet itself is small.

[0019] The fluazinam and brassinolide in the present application are both green and environmentally friendly low-toxicity pesticides, which can meet the needs of environmental safety, and the millet wood ash is not only non-toxic, but also contains rich mineral elements, which can improve soil fertility and promote millet growth.

[0020] The fluazinam, millet wood ash and brassinolide in the present application produce a synergistic effect, and the control effect of the three on nematodes is much higher than that of single fluazinam.

[0021] 2, the control method in the present application can kill nematodes carried by millet in the millet seed period, avoid the reproduction and spread of nematodes, and prevent nematode disease of millet from the source.

[0022] 3, the coating agent in the present application forms a gelatinous protective shell on the outside of the seed, which not only hinders the invasion of external nematodes, but also avoids the emergence of nematodes that have not been eliminated inside the seed, so that the nematode disease between adjacent millets is not easily transmitted, thereby achieving the effect of nematode control.

[0023] In addition, the coating also has a sustained release effect, which can continuously release the diluted nematocide adsorbed by the straw powder, thereby achieving the effect of nematode control on millet for a long time. BRIEF DESCRIPTION OF DRAWINGS

[0024] Figure 1 It is a field photo of millet nematode control effect 1;

[0025] Figure 2 It is a field photo of millet nematode control effect 2. DETAILED DESCRIPTION

[0026] The application will be further described below in connection with the accompanying drawings and specific embodiments: I. Embodiments

[0028] Embodiment 1

[0029] S1, put the nematicide into water and mix well;

[0030] S2, then put the millet seeds into the nematicide and mix well, and then soak the seeds for 4 hours;

[0031] S3, put the soaked seeds into the gelatinous coating agent and mix well, and then bury the seeds and the coating agent together in the seeding ditch;

[0032] The nematicide includes flupyradifurone with a concentration of 0.15%, millet wood ash with a concentration of 1%, and brassinolide with a concentration of 3%.

[0033] Embodiment 2

[0034] The difference between Embodiment 2 and Embodiment 1 is only in the proportion of the nematicide. The nematicide in Embodiment 2 includes flupyradifurone with a concentration of 0.2%, millet wood ash with a concentration of 1%, and brassinolide with a concentration of 3%. See Table 1 for details.

[0035] Embodiment 3

[0036] The difference between Embodiment 3 and Embodiment 1 is only in the proportion of the nematicide. The nematicide in Embodiment 3 includes flupyradifurone with a concentration of 0.25%, millet wood ash with a concentration of 1%, and brassinolide with a concentration of 3%. See Table 1 for details.

[0037] Embodiment 4

[0038] The difference between Embodiment 4 and Embodiment 1 is only in the proportion of the nematicide. The nematicide in Embodiment 4 includes flupyradifurone with a concentration of 0.3%, millet wood ash with a concentration of 1%, and brassinolide with a concentration of 3%. See Table 1 for details.

[0039] Embodiment 5

[0040] The difference between Embodiment 5 and Embodiment 2 is only that no soaking is performed in Embodiment 5, and the seeds treated with the nematicide are directly put into the coating agent.

[0041] Embodiment 6

[0042] The difference between Embodiment 5 and Embodiment 2 is only in the soaking time. The soaking time of the seeds in Embodiment 6 is 2 hours. See Table 1 for details.

[0043] Embodiment 7

[0044] Example 7 is different from Example 2 only in the seed soaking time, the seed soaking time in Example 7 is 6h, see Table 1.

[0045] Comparative Example 1

[0046] Comparative Example 1 is different from Example 2 only in the composition of the nematicide, the nematicide in Comparative Example 1 does not contain millet wood ash, see Table 1.

[0047] Comparative Example 2

[0048] Comparative Example 2 is different from Example 2 only in the composition of the nematicide, the nematicide in Comparative Example 2 does not contain brassinolide, see Table 1.

[0049] Comparative Example 3

[0050] Comparative Example 3 is different from Example 2 in that, in Comparative Example 3, the seed is not coated, but the seed after soaking is directly sown.

[0051] II. Prevention experiment

[0052] In the test field, multiple experimental fields are divided and isolated from each other, the same batch of millet seeds is taken, and the seeds are treated by the methods in the initial group, Examples 1-7 and Comparative Examples 1-3, respectively, and then the seeds in each group are sown in a separate experimental field, and the same field management parameters are used during planting, such as fertilizer amount, irrigation amount, etc.

[0053] During planting, the growth of millet in each group of experimental fields is observed, and the nematode control rate and germination rate are calculated, respectively, see Table 1 and Figures 1-2 , wherein Figure 1 and Figure 2 The treatment group in Example 2, and the control group is the initial group.

[0054] Table 1

[0055]

[0056] From Table 1 and Figures 1-2 It can be seen that the method in the present application can effectively improve the nematode control rate of millet, and the nematode control rate of millet is as high as 90% or more after coating treatment with a suitable formula of nematicide, and the germination rate is as high as 95% or more.

[0057] In the initial group, no nematicide is used for treatment, Figures 1-2 purple spikes appear obviously in

[0058] In Comparative Example 3, since the coating process was not performed, the millet was attacked by the nematodes again in the soil after a certain period of growth due to the volatilization of the nematicide, resulting in a low control rate of the nematodes in Comparative Example 3.

Claims

1. A method for controlling nematodes in millet based on the millet seed stage, characterized by, The method comprises the following steps: S1, putting a nematicide into water and mixing well; S2, then putting millet seeds into the nematicide and mixing well, and then soaking the seeds for 4 hours; S3, putting the soaked seeds into a gelatinous coating agent and stirring well, and then putting the seeds and the coating agent into a seeding ditch together; The nematicide is fluopyram with a mass concentration of 0.2%, millet grasswood ash with a mass fraction of 1%, and brassinolide with a mass fraction of 3%.

2. The method according to claim 1, wherein the method is characterized by, The coating agent in step S3 comprises, by mass fraction, 10-20 parts of carboxymethyl cellulose, 5-10 parts of carboxymethyl chitosan, and 20-30 parts of straw powder.

3. The method according to claim 2, wherein the method is characterized by, The preparation method of the coating agent comprises the following steps: A, soaking straw powder in a nematicide diluted by 10-15 times; B, taking out the soaked straw powder, and then adding carboxymethyl cellulose, carboxymethyl chitosan, straw powder, and water into a container respectively, and stirring well to form a gelatinous coating agent.

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