Recently, Lishui County reader Huang Mingyuan telephone consultation: Which herbicide is used to remove grass after corn seedlings? The reporter asked the Shandong Academy of Agricultural Sciences about plant protection experts on this issue.
According to experts, in recent years, the production practice in our province has proved that the effect of weeding with Yunongle herbicide after corn seedlings is very good.
Yu Nong Le is also called nicosulfuron. Its processing dosage form is 4% suspension, and the dosage of 4% Yu Nong Le Suspending Agent is 1.5 liters per hectare. The specific application methods are as follows:
I. Application period: 3 to 5 leaf stage after corn seedlings, 2 to 4 leaf stage of annual weeds, before the 6-leaf stage of perennial weeds, most weeds are applied at the same time, the herbicidal effect is the best, and it is safe for corn. . Yu Nong Le not only has good stem and leaf treatment activity, but also has soil blocking grass killing effect. Therefore, the application should not be too late, the weeds are too late, and the resistance is enhanced.
Second, the control objects: valerian, wild oats, foxtail, golden foxtail, crabgrass, goosegrass, wild scorpion, willow locust, sorrel, stalk, stalk, stalk, sylvestris, toad, water prickly Needles, leeks, cockleburs, ramie, comfrey, wolf grass, broccoli, blue cabbage, worm, artemisia, thorns, scorpion, leeks and other annual weeds and perennial broadleaf grass. It has good curative effect on cockroaches, small cockroaches, terracotta, medlar, and reed.
Third, the application technology: when the soil moisture, air temperature is appropriate, is conducive to the absorption and transmission of weeds. Long-term drought, low temperature and relative humidity of the air below 65% are not suitable for application. Generally, it should be chosen in the morning and evening when the temperature is low and the wind is applied in the wind; in the case of drought, it is best to add a surfactant. Long-term drought, such as rain in the near future, after the rain has passed, the field humidity is improved, and then the application is applied, or the irrigation condition is applied after the irrigation. Although the application time is delayed, the herbicidal effect will be better than that before the rain.
It is best to use the fan-shaped nozzle for artificial application, apply the medicine along the ridge, spray one ridge at a time, set the height, pressure and walking speed of the nozzle, and do not spray the spray to the left and right to ensure uniform spraying. The application rate of the seedlings should be calculated according to the ridge distance and the spray width, that is, the actual spray area. Combined with mechanical cultivating after application, strengthening field management is conducive to the control of late weeds.
4. Mixed use: 4% Yu Nongle 0, 75 liters per hectare plus 72% 2,4-butyl butyl 375 ml plus 40% atrazine 2 liters, adding 1% vegetable oil synergist such as spray Get 7, Xindebao, Collet, Hessen, etc., speed up the weeds on the absorption and conduction speed of herbicides such as Yu Nong Le, have a significant synergistic effect (the corn variety can be used for sensitivity identification 2, 4 - drops Butyl ester). Stable pharmacological effects can also be obtained under drought conditions. The weeds are small, and the water is good when the jade farm uses a low amount; the weeds are large, and the high amount is used under drought conditions. It can be mixed with 70% Sike 100g and 4% Yu Nongle 0, 75～1, 0L per hectare, which can have good efficacy and safety. The spray volume of the artificial knapsack sprayer is 300 to 400 liters per hectare, and the tractor sprayer is 150 liters. Ultra-low volume spray cannot be used. Hand-held ultra-low volume sprayers and backpack-type motorized sprayers such as Taishan-18 and Dongfanghong-18 can not be used.
V. Attention: After the rotation, the cockroaches have medicinal damage to beets, cabbage and spinach.
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