Glyphosate is the first choice for herbicides, but due to its prone to phytotoxicity, it has carcinogenic properties in humans. So today, France started the glyphosate “sweeping†campaign, and the first glyphosate herbicide has been banned. However, glyphosate in China is still a relatively popular herbicide in the market. For the use of glyphosate, the following Huinong Network Xiaobian introduces the specific use methods and remedies for phytotoxicity.
1. Method for weeding glyphosate farmland
1. You can spray 10% water of glyphosate 1-3 days before sowing. For farmers who are eager to sow, they can also be directly sown after spraying. Because the drugs and seeds will not be applied before sowing. Direct contact, so there is no effect on its germination and seedling growth.
2. Weeding with glyphosate during crop growth period, spray or directional spray can be used. Directional spray is more suitable for the difference between weeds and crops, such as inter-row weeding of corn and sugar cane and after racking. Weeding between rows of beans and melons.
3, the use of glyphosate in the farmland should pay attention to the period of use, in general, the annual weeds about 15cm height, perennial weeds about 30cm is the best spraying period, such as when using glyphosate to control corn weeds, When the corn grows to 1.5 m or more, the lower part has 2-3 pieces of old leaves, and the grass height is about 10 cm. However, because glyphosate is a herbicide, it cannot be used in rice fields.
Second, glyphosate orchard weeding method
1. Annual orchard weedy weed, foxtail, hog, cocklebur, goosegrass, and maiden, orchard, can use 10% water glyphosate 400-500ml per mu;
2, orchard, small canopy, white wormwood and other orchards, can use 10% water glyphosate 600-700ml per acre;
3, orchard, reed, snakeberry, sedge and other orchards, can use 10% water glyphosate 1000ml per acre.
Note: There is a big difference between the height of the weeds in the orchard and the tree body. Therefore, when spraying, the directional spray method based on weed stems and leaves should be used as much as possible to avoid damage to the tree leaves and reduce the tree potential.
Third, glyphosate forest land weeding method
Glyphosate is mainly used in the forestry before the afforestation, such as leisure land, barren hills and wasteland. In addition to the difference in the amount of weeds removed from the orchard, there is almost no significant difference. For example, when controlling shrubs, the amount needs to be added to 1.5-3.0 kg of 10% water per acre.
Fourth, the consequences of improper use of glyphosate and remedies
Some of the orchards use glyphosate to cause phytotoxicity. The main causes of phytotoxicity are: unreasonable spraying operation, causing the drug to drift with the wind, and then causing damage to the roots through the leaves of the fruit trees;
And after spraying, it rains, and the agent penetrates into the soil around the roots of the plant through rainwater, and is absorbed by the roots; or the operation of fertilization in the orchard is unscientific, the roots of the fruit trees become shallow, sprayed onto the root surface when spraying, and glyphosate is also added. Degradation in the soil, the production of phosphate, combined with iron, zinc and other cations in the soil, resulting in plant deficiency.
Remedy:
1, foliar topdressing. Fruit trees damaged by glyphosate are often affected by the absorption capacity of roots, which can not guarantee the normal growth and nutrient requirements of plants. At this time, nutrition can be supplemented by foliar topdressing.
2. Cultivate the root system. Simple foliar topdressing can only solve the need of the moment. The long-term plan is still healthy and strong root system. Specifically, it can be applied with water-soluble fertilizer such as humic acid and alginic acid, and then applied for about 2-3 times.
3, by spraying grass ash or water, neutralizing the acidic substances in the herbicide, and then spraying the brassinolide, and adding an appropriate amount of sodium nitrophenolate is easy, reducing the toxic effect.
The above is about the use of glyphosate. Weeds will grab nutrients with crops, cause poor crop growth, low yield, poor quality, etc. Therefore, weeding is imperative, but remind farmers to use glyphosate. When weeding, be sure to follow the operation methods, usage, use time, etc., in order to improve quality and efficiency.
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