Method for preventing and controlling false sorghum by using alternative plants

Abstract

The invention belongs to the field of weed biological prevention and control, and particularly relates to a method for preventing and controlling false sorghum by using alternative plants. On the basis of using the glyphosate, the sesbania and the king grass are used for replacing the sorghum halepense, the regeneration of the sorghum halepense can be effectively delayed, due to the growth of the sesbania and the king grass, the growth of the sorghum halepense can be effectively inhibited, the use frequency and dosage of the glyphosate can be effectively reduced, and the pesticide pollution is reduced. Meanwhile, the king grass and the sesbania are high-quality forage grass, the yield of the forage grass can be increased through cultivation of the king grass and the sesbania, and economic benefits are increased while the false sorghum is prevented and controlled.

Description

Technical Field

[0001] The invention belongs to the field of biological weed control, and in particular relates to a method for controlling sorghum bicolor by using alternative plants. Background Art

[0002] Sorghum sorghum is the main weed in more than 30 kinds of crop fields, including cereal crops, cotton, alfalfa, sugarcane, and hemp. Due to its strong reproductive capacity, adaptability, and competitiveness, it can significantly reduce crop yields after invading farmland. Sorghum sorghum is also the alternate host of many pests and plant diseases, which greatly increases the difficulty of crop disease and pest control. In addition, the pollen of sorghum sorghum is easy to hybridize with sorghum crops for seed preservation, which reduces crop yields and deteriorates varieties, causing great harm to agricultural production. At the same time, the secretions of sorghum roots and rotten leaves, underground stems, roots, etc. can inhibit crop seed germination and seedling growth. Sorghum sorghum has a very strong reproductive capacity and is extremely difficult to remove once it is planted. Therefore, the development of effective methods for the prevention and control of sorghum sorghum is of great significance to agricultural production. Summary of the invention

[0003] The present invention provides a method for controlling sorghum bicolor by using alternative plants. On the basis of spraying glyphosate, combined with the planting of royal grass and sesbania, sorghum bicolor can be effectively controlled, the use of glyphosate can be reduced, and a new idea is provided for the biological control effect of sorghum bicolor.

[0004] The technical solution of the present invention is achieved in this way:

[0005] A method for controlling sorghum sorghum using alternative plants comprises the following steps:

[0006] (1) In plots where sorghum is grown, spray glyphosate to remove the sorghum growing on the ground;

[0007] (2) After the branches and leaves of the sorghum are dried, the branches and leaves are cleared away, and the pre-cultivated royal grass and sesbania are transplanted;

[0008] (3) During the growth period of king grass and field sesbania, if the height of the revived false sorghum is equal to or greater than 1m, glyphosate should be used to control the false sorghum.

[0009] Furthermore, in the step (1), the concentration of glyphosate is 41% glyphosate isopropylamine salt by mass, 80 ml is sprayed per mu, and during the spraying process, 45 liters of water is added per mu.

[0010] Furthermore, in the step (3), the concentration of glyphosate is 41% glyphosate isopropylamine salt by mass, 80 ml is sprayed per mu, and 45 liters of water is added per mu during the spraying process.

[0011] Furthermore, in the step (2), the stalks of the royal grass are cut into segments of about 10 cm, and each segment must have a stem node; and the sesbania seedlings are grown to 10-15 cm about one month in advance.

[0012] Furthermore, in the step (2), during the planting of royal grass and sesbania, single-row spacing or staggered planting of royal grass and sesbania in each row is adopted, with a row spacing of 20-25 cm; and a plant spacing of 20-25 cm in each row.

[0013] Furthermore, in the step (2), the branches and leaves are cleaned 25-40 days after the glyphosate is sprayed.

[0014] Furthermore, in the step (3), glyphosate is sprayed to avoid being sprayed on royal grass.

[0015] The above-mentioned prevention and control methods are applied in preventing and controlling the invasion of false sorghum.

[0016] Beneficial effects:

[0017] The method for controlling false sorghum by using alternative plants of the present invention adopts glyphosate to remove the growing false sorghum first, and then transplants the pre-cultivated sesbania and royal grass stems. Once the height of the revived false sorghum is greater than or equal to 1m, glyphosate is used again for prevention and control. The present invention uses spraying glyphosate to kill false sorghum, combined with the comprehensive prevention and control method of cultivating sesbania and royal grass. Since the cultivated sesbania and royal grass are transplanted, the resurrection of false sorghum can be effectively delayed, thereby reducing the use of glyphosate. Once the revived false sorghum of false sorghum grows too vigorously, glyphosate can continue to be used for removal without affecting the growth of royal grass and sesbania. On the basis of using glyphosate, the present invention uses sesbania and royal grass to replace false sorghum, which can effectively delay the resurrection of false sorghum. Due to the growth of sesbania and royal grass, the growth of false sorghum can be effectively inhibited, and the number and dosage of glyphosate use can be effectively reduced, reducing the pollution of pesticides. At the same time, royal grass and field sesbania are high-quality forage grasses. The cultivation of the two can increase the forage harvest, and while preventing and controlling false sorghum, it also increases economic benefits. DETAILED DESCRIPTION

[0018] The present invention will be further described below in conjunction with specific implementation modes to provide a better understanding of the present invention.

[0019] Example 1

[0020] (1) In the plots where sorghum is grown, glyphosate is sprayed to remove the sorghum growing on the ground; the concentration of glyphosate is 41% glyphosate isopropylamine salt by mass, and 80 ml is sprayed per mu. During the spraying process, 45 liters of water are added per mu.

[0021] (2) After about one month (25-40 days), when the branches and leaves of the pseudosorghum have dried up, clean up the branches and leaves, and transplant the pre-cultivated royal grass and sesbania. Before transplanting, cut the royal grass stems into sections of about 10 cm, and ensure that each section has stem nodes. Raise the sesbania seedlings to 10-15 cm about one month in advance. During the planting process, plant them in single rows, that is, one row of sesbania and one row of royal grass. The row spacing is 20 cm. The plant spacing between each row of royal grass or sesbania is 25 cm.

[0022] (3) During the growth period of royal grass and field sesbania, once the height of the regenerated false sorghum is equal to or greater than 1m, glyphosate is used to control the false sorghum, and glyphosate is sprayed to avoid being sprayed on royal grass; the glyphosate used is glyphosate isopropylamine salt with a mass concentration of 41%. Since there are frequent pauses during the spraying process, it is diluted 562.5 times according to the preparation, that is, the same concentration as step (1).

[0023] Example 2

[0024] (1) In the plots where sorghum is grown, glyphosate is sprayed to remove the sorghum growing on the ground; the concentration of glyphosate is 41% glyphosate isopropylamine by mass, and 80 ml is sprayed per mu. During the spraying process, 45 liters of water are added per mu.

[0025] (2) After about one month (25-40 days), when the branches and leaves of the pseudosorghum have dried up, remove the branches and leaves, and transplant the pre-cultivated royal grass and sesbania. Before transplanting, cut the royal grass stems into sections of about 10 cm, and ensure that each section has stem nodes. Raise the sesbania seedlings to 10-15 cm about one month in advance. During the planting process, plant them in single rows, that is, one row of sesbania and one row of royal grass. The row spacing is 20 cm. The plant spacing between each row of royal grass or sesbania is 20 cm.

[0026] (3) During the growth period of royal grass and sesbania, once the height of the regenerated false sorghum is equal to or greater than 1m, glyphosate is used to control the false sorghum, and glyphosate is sprayed to avoid being sprayed on royal grass; the concentration of glyphosate used is glyphosate isopropylamine salt with a mass concentration of 41%. Since there are frequent pauses during the spraying process, the glyphosate is diluted 562.5 times according to the preparation, that is, the same concentration as step (1).

[0027] Example 3

[0028] (1) In the plots where sorghum is grown, glyphosate is sprayed to remove the sorghum growing on the ground; the concentration of glyphosate is 41% glyphosate isopropylamine by mass, and 80 ml is sprayed per mu. During the spraying process, 45 liters of water are added per mu.

[0029] (2) After about one month (25-40 days), when the branches and leaves of the pseudosorghum have dried up, remove the branches and leaves, and transplant the pre-cultivated royal grass and sesbania. Before transplanting, cut the royal grass stems into sections of about 10 cm, and ensure that each section has stem nodes. Raise the sesbania seedlings to 10-15 cm about one month in advance. During the planting process, plant them in single rows, that is, one row of sesbania and one row of royal grass. The row spacing is 25 cm. The plant spacing between each row of royal grass or sesbania is 25 cm.

[0030] During the growth period of royal grass and field sesbania, once the height of the regenerated false sorghum is equal to or greater than 1m, glyphosate is used to control the false sorghum, and glyphosate is sprayed to avoid being sprayed on royal grass; the concentration of glyphosate used is glyphosate isopropylamine salt with a mass concentration of 41%. Since there are frequent pauses during the spraying process, the glyphosate is diluted 562.5 times according to the preparation, that is, the same concentration as step (1).

[0031] Example 4

[0032] The royal grass stems and the cultivated sesbania were planted according to the method of Example 1. During the planting process, royal grass and sesbania plants were planted alternately in each row.

[0033] Comparison of the control effects of different control methods on sorghum sorghum

[0034] Three plots where sorghum bicolor had been grown continuously for many years were selected, and each plot was divided into 10 plots. In April of the first year, all plots were uniformly sprayed with glyphosate (glyphosate isopropylamine with a mass concentration of 41%) at a rate of 80 ml / mu, and 45 liters of water were added to remove the growing sorghum bicolor. After 40 days, when the sorghum bicolor plants were dry, the dry branches and leaves were cleaned up. Each treatment was carried out according to the following scheme, and the control effects of different prevention and control methods on sorghum bicolor were compared.

[0035] Solution 1: Use the method of Example 1 for prevention and control.

[0036] Solution 2: Use the method of Example 2 for prevention and control.

[0037] Solution 3: Use the method of Example 3 for prevention and control.

[0038] Plan 4: Follow the method in Plan 1, only transplant Sesbania serrata and use glyphosate for prevention and control.

[0039] Plan 5: Refer to the method in Plan 1, only transplant king grass and use glyphosate for prevention and control.

[0040] Option 6: Follow the method in Option 1, only transplant Sesbania and King Grass, but do not use glyphosate.

[0041] Plan 7: Refer to the method in Plan 1, only use glyphosate for prevention and control, and do not transplant field sesbania and king grass.

[0042] Plan 8: Follow the method in Plan 1, only use glyphosate for prevention and control, and do not transplant Sesbania and King Grass. The difference is that the amount of glyphosate used is 300 ml / mu, that is, 300 ml per mu is evenly sprayed with 45 liters of water.

[0043] Plan 9: Referring to the method in Plan 1, seedlings of Sesbania sessilifolia and King Grass will not be raised, but directly sown in the field, and glyphosate will be used for control.

[0044] Solution 10: Carry out prevention and control according to the method of Example 4.

[0045] In Schemes 1-6, 9 and 10, sesbania and king grass were transplanted (or sown) on the same day, and in Schemes 7 and 8, glyphosate was sprayed for control when the pseudosorghum grew to 1.0m. Starting from the date of transplanting or sowing sesbania and king grass, the time of pseudosorghum revival and the number and amount of glyphosate used in each plot before sesbania and king grass were harvested were counted. After the harvest of sesbania and king grass in the same year, no treatment was done on each plot, and the revival of pseudosorghum was counted in April of the following year. The specific results are shown in Table 1-2.

[0046] Table 1 Comparison of the control effects of different treatment methods on false sorghum

[0047]

[0048] Note: In Option 6, since glyphosate is not sprayed, the revived sorghum will continue to grow.

[0049] As can be seen from Table 1, Schemes 1-3 and 10 respectively adopt the methods described in Examples 1-4 of the present invention for control, the growth rate of the regenerated Sorghum sorghum is significantly inhibited, and the amount of glyphosate used is also reduced to varying degrees.

[0050] In Scheme 9, no seedlings of Sesbania sesbania and Sorghum sinensis were raised. Although the amount of glyphosate used was not much different from that used in Examples 1-4, the growth rate of the revived Sorghum sinensis was significantly improved. The time it took for the revived Sorghum sinensis to grow to 1.0 m for the first and second times was significantly shortened, and the amount of Sorghum sinensis revived in the second year also increased to varying degrees.

[0051] In schemes 4 and 5, sesbania or king grass were transplanted alone. Compared with embodiments 1-4, the time for the revived sorghum to grow to 1.0 m for the first and second time was shortened to varying degrees. The amount of glyphosate used was increased, and the amount of revived sorghum in the second year also increased.

[0052] In Scheme 6, only Sesbania and King Grass were transplanted, and in Scheme 7, only glyphosate was used for control. Compared with Examples 1-4, the growth rate of the sorghum revived in the first year was greatly increased, and the sorghum revived in the second year also increased significantly. In Scheme 8, the amount of glyphosate was increased, but compared with Examples 1-4, the growth rate of the sorghum revived in the first year and the sorghum revived in the second year still increased significantly.

[0053] Based on the above data, it can be seen that the method for controlling sorghum with transplanted sesbania-king grass combined with glyphosate used in Examples 1-4 of the present invention can not only effectively inhibit the growth rate of the regenerated sorghum in the current year, but also effectively reduce the regeneration of sorghum in the second year. The control effect on sorghum is significantly higher than that of other treatment groups.

[0054] The specific embodiments of the present invention are described in detail above, but they are only examples, and the present invention is not limited to the specific embodiments described above. For those skilled in the art, any equivalent modifications and substitutions made to the present invention are also within the scope of the present invention. Therefore, the equalization changes and modifications made without departing from the spirit and scope of the present invention should be included in the scope of the present invention.

Claims

1. A method for controlling sorghum sorghum using alternative plants, characterized in that: The following steps are involved: (1) In plots where sorghum is grown, spray glyphosate to remove the sorghum growing on the ground; (2) After the branches and leaves of the sorghum are dried, the branches and leaves are cleared away, and the pre-cultivated royal grass and sesbania are transplanted; (3) During the growth period of king grass and field sesbania, if the height of the revived false sorghum is equal to or greater than 1m, glyphosate should be used to control the false sorghum.

2. A method for controlling Sorghum sinensis using alternative plants as claimed in claim 1, characterized in that: In the step (1), the concentration of glyphosate is 41% glyphosate isopropylamine salt by mass, 80 ml is sprayed per mu, and 45 liters of water is added per mu during the spraying process.

3. A method for controlling Sorghum sinensis using alternative plants as claimed in claim 1, characterized in that: In the step (3), the concentration of glyphosate is 41% glyphosate isopropylamine salt by mass, 80 ml is sprayed per mu, and 45 liters of water is added per mu during the spraying process.

4. A method for controlling Sorghum sinensis using alternative plants as claimed in claim 1, characterized in that: In the step (2), the stalks of the royal grass are cut into segments of about 10 cm, and each segment must have a stem node; and the sesbania seedlings are grown to 10-15 cm about one month in advance.

5. The method for controlling Sorghum sinensis using alternative plants as claimed in claim 1, characterized in that: In the step (2), during the planting of royal grass and sesbania, single-row spacing or staggered planting of royal grass and sesbania in each row is adopted, with a row spacing of 20-25 cm; the plant spacing in each row is 20-25 cm.

6. A method for controlling Sorghum sinensis using alternative plants as claimed in claim 1, characterized in that: In the step (2), the branches and leaves are cleaned 25-40 days after the glyphosate is sprayed.

7. A method for controlling Sorghum sinensis using alternative plants as claimed in claim 1, characterized in that: In the step (3), glyphosate is sprayed to avoid being sprayed on royal grass.

8. Use of the control method according to any one of claims 1 to 7 in controlling the invasion of Sorghum sinensis.

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