Common herbicides in corn fields
Thiosulfuron-methyl: long-lasting effect, easy to produce phytotoxicity to the crops. Acetochlor: There is a phytotoxicity if the dosage is too high or low temperature and heavy rain. Atrazine: long-lasting effect, easy to produce phytotoxicity to the crops. Metolachlor: If the dosage is too large, the spray is not uniform, or the rain will cause phytotoxicity after application.
2 A 4 chlorine: corn is easy to produce phytotoxicity when it is jointed, and dicotyledon is sensitive to it, which is prone to drifting phytotoxicity.
Nicosulfuron: Different varieties have different resistance to the drug, and the drug is sensitive to the drug before and after the 2 leaf stage.
Mesotrione: It may cause phytotoxicity when used in excess or after application.
24-D butyl ester: In case of heavy rain after application, it is easy to produce leaching phytotoxicity. The use of excessive doses and improper use of the period caused the corn phytotoxicity to account for about 20% of the applied area, and it could not be recovered under severe conditions.
Common herbicides in soybean fields
Acetochlor: The dosage is generally too high, and the phytotoxicity is serious. In severe cases, the yield can be reduced by 20% to 30%.
Excessive dosage before seedling, too deep sowing, low soil organic matter content, low wetland and heavy rain will cause phytotoxicity. Improper use, no application of soil after application in the arching period or pre-emergence application, especially in low-lying areas.
Quinoxaline: Pay attention to the drifting physiology of other sensitive crops.
Fomesafen: The area affected by crops is about 80% of the area used due to the high dosage.
High temperature, premature or late application, poor drainage in low-lying areas, low temperature and high humidity, long-term accumulation of water in the field is prone to phytotoxicity (can return to normal).
Secchin: Different varieties have different resistance to medicinal agents, and continue to have high temperature, continuous rainfall and sandy soils with phytotoxicity or death.
24-D butyl ester: After the application of the soil, heavy rain will produce phytotoxicity. After the application of the stem and leaf, it is difficult to recover. The use of 24-D butyl ester and its mixture often cause soybean seedling phytotoxicity to account for 10% to 20% of the 24-D butyl ester application area.
Common herbicides in rice fields
Butachlor: When the water is applied too deep, the water will flood the heart and cause phytotoxicity. The dosage used is too high, the use period is improper, and the area of ​​occurrence accounts for 50% of the used area.
Quinclorac: Unsafe to inhibit rice growth.
2 A 4 chlorine: poor safety to rice, inhibiting tillering, resulting in different levels of yield reduction.
Destroyed pine: drain the surface water, otherwise it will easily cause phytotoxicity.
Oxazone: The water layer of rice seedlings is flooded with leaf core, or excessive application and uneven application will produce different degrees of phytotoxicity.
Bensulfuron-methyl: pay attention to water depth and water retention time, otherwise it is easy to produce phytotoxicity.
Penoxsulam: When applied in deep water, it is easy to cause phytotoxicity.
Shakespeare Phosphorus: Excessive application or flooding of heart leaves can cause phytotoxicity. The safety of the drug itself and the quality of the seedlings in the north are weak, and the area occupied accounts for 20% of the used area.
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