Herbicide composition

[0039] Biological Example 1: Field efficacy test for controlling weeds in corn fields

[0040] 1. Test treatment

[0041] (1) 30% atrazine·nicosulfuron·diclopyridine oil suspension (25∶4∶1) 40ml/mu

[0042] (2) 30% atrazine·nicosulfuron·diclopyralid oil suspension (25∶4∶1) 60ml/mu

[0043] (3) 30% atrazine·nicosulfuron·diclopyralid oil suspension (25∶4∶1) 80ml/mu

[0044] (4) 30% atrazine·nicosulfuron·diclopyridine oil suspension (25∶4∶1) 100ml/mu

[0045] (5) 38% atrazine suspension 200ml/mu

[0046] (6) 4% nicosulfuron oil suspension 67ml/mu

[0047] (7) 75% diclopyralic acid water dispersible granules 15g/mu

[0048] (8) Clean water control

[0049] The experiment set 8 treatments, 4 repetitions, a total of 32 treatment plots, each treatment plot area of ​​20 square meters, random block arrangement. 30% atrazine·nicosulfuron·diclopyridine oil suspension (produced by Shandong Binnong Technology Co., Ltd.) as the test agent, 38% atrazine suspension, 4% nicosulfuron oil suspension And 75% clopyralid water dispersible granules are the control agents, and the non-application sprayed water is the blank control (CK). Add 30 kg of water per mu, and use 552 C sprayer (0.7mm aperture) to spray evenly. The main weeds in the field are: crabgrass, barnyardgrass, goosegrass, purslane, amaranthus retroflex, and amaranth and so on.

[0050] 2. Test items and methods

[0051] (1) Safety: After application, investigate the growth and development of corn, and evaluate the safety of the test agent on corn.

[0052] (2) Weeding effect: randomly select 4 points from each plot, and investigate 1/4 square meter at each point. Investigate once 15 days and 30 days after application. Record the types and numbers of weeds and calculate the control effect of weeds. After the last investigation, 4 points of weeds in the community were collected, the fresh grass weight was weighed, and the fresh grass weight control effect was calculated.

[0053] (3) Experimental results

[0054] ①Safety: The survey after application showed that the plant height and leaf color of corn in the treatment area were basically the same as those in the blank control area, indicating that the 30% atrazine·nicosulfuron·diclopyralid oil suspension of the test agent was safe for corn .

[0055] ② Weeding effect. The test results are shown in Table I

[0056]

[0057] It can be seen from Table 1 that the 30% atrazine·nicosulfuron·diclopyridine oil suspension has a better control effect on weeds in corn fields. 15 days after application, 80 or 100ml of 30% atrazine·nicosulfuron·diclopyridin oil suspension used per mu has the best weed control effect, and the control effect of weeds is 93.7-96.4%, which is higher than the control agent 38 % Atrazine Suspension Concentrate has a control effect of 200ml/mu per mu (86.6%), 4% Nicosulfuron Suspension Concentrate has a control effect of 67ml/mu per mu (88.8%) and 75% Diclopyridine water dispersible granules The control effect of 15g/mu per mu (78.2%). 30 days after application, 30% atrazine·nicosulfuron·diclopyralid oil suspension used 60, 80 and 100ml per mu has better weed control effect, and the control effect of weeds is 93.4-99.8%. The effect is 94.1-98.1%, which is better than the control agent 38% atrazine suspending agent, 4% nicosulfuron suspending agent and 75% clopyralid water dispersible granules (the number of weeds is 89.1%, 92.3% And 88.3%, fresh weight control effect is 87.6%, 93.6% and 86%). The above shows that the 30% atrazine·nicosulfuron·diclopyridine oil suspension has an obvious synergistic effect compared with a single agent.

[0058] Biological Example 2: Field efficacy test for controlling weeds in corn fields

[0059] 1. Test treatment

[0060] (1) 70% Atrazine·Nicosulfuron·Diclopyralid WP (40:20:10) 50ml/mu

[0061] (2) 61% Atrazine·Nicosulfuron·Diclopyralid WP (40:20:1) 50ml/mu

[0062] (3) 51% Atrazine·Nicosulfuron·Diclopyralid WP (40∶1∶10) 50ml/mu

[0063] (4) 42% atrazine·nicosulfuron·diclopyridine oil suspension (40∶1∶1) 100ml/mu

[0064] (5) 31% atrazine·nicosulfuron·diclopyridine oil suspension (1∶20∶10) 100ml/mu

[0065] (6) 22% atrazine·nicosulfuron·diclopyralid oil suspension (1∶20∶1) 100ml/mu

[0066] (7) 36% atrazine·nicosulfuron·diclopyralid oil suspension (1∶1∶10) 100ml/mu

[0067] (8) 30% atrazine·nicosulfuron·diclopyralid oil suspension (1∶1∶1) 100ml/mu

[0068] (9) 38% atrazine suspension 200ml/mu

[0069] (10) 4% nicosulfuron suspension 67ml/mu

[0070] (11)75% diclopyralic acid water dispersible granules 15g/mu

[0071] (12) Clear water control

[0072] The experiment set up 12 treatments, 4 repetitions, a total of 48 treatment plots, each treatment plot area of ​​20 square meters, random block arrangement. (1)-(8) Atrazine·Nicosulfuron·Diclopyralid (produced by Shandong Binnong Technology Co., Ltd.) as test agents, 38% atrazine suspension, 4% nicosulfuron Suspension agent and 75% clopyralid water dispersible granules are control agents, and no spraying water is used as blank control. Add 30 kg of water per mu, and use 552 C sprayer (0.7mm aperture) to spray evenly. The main weeds in the field are: crabgrass, barnyardgrass, goosegrass, purslane, amaranthus retroflex, and amaranth and so on.

[0073] 2. Test items and methods

[0074] (1) Safety: After application, investigate the growth and development of corn, and evaluate the safety of the test agent on corn.

[0075] (2) Weeding effect: randomly select 4 points from each plot, survey 1/4 square meter at each point, and survey once every 30 days after application. Record the types and number of weeds respectively, calculate the control effect of weeds, and call them fresh Grass weight, calculate the control effect of fresh grass.

[0076] (3) Test results

[0077] ①Safety: Investigation after application, the plant height and leaf color of corn in the chemical treatment area are basically the same as those in the blank control area, indicating that the test agents (1)-(8) atrazine, nicosulfuron, and clopyralic acid are all Safe for corn.

[0078] ②Weeding effect

[0079] The test results are shown in Table II

[0080] It can be seen from Table II that different ratios of atrazine, nicosulfuron, and clopyralid have a good control effect on common annual weeds. The control effect on weeds is between 80.9% and 83.0%. The heavy control effect is between 84.1% and 86.9%, which can effectively control weeds in the corn field and ensure that the corn is not harmed by weeds during the entire growth period.

[0081]

[0082] The above test examples show that the optimal ratio of atrazine·nicosulfuron·diclopyralid=25:4:1 has a significant control effect on common annual gramineous and broad-leaved weeds in corn fields. The control effect of Hexianzhong is about 90%, and the effective period is more than one month, which basically controls the weed damage of the corn throughout the growth period. And in the range of atrazine·nicosulfuron·diclopyralid=40~1∶20~1∶1∶1, it has a good control effect on common annual gramineous and broad-leaved weeds in corn fields. .