After wheat is harvested, it immediately enters the sowing period of summer corn, followed by the application of corn chemical weeding. In recent years, with the increase of herbicide varieties and the widespread promotion of chemical control technologies in agricultural production, chemical weeding has been widely used in various stages of corn growth. In order to improve the chemical weeding effect of corn fields, it is required that the corn growers earnestly implement the “four customs†and “do nothingâ€:
Four off
One off: It is the first stage of control of weeds in corn fields. After harvesting, if more weeds have been unearthed in the field, the herbicides such as paraquat and glyphosate can be used to kill. The former can kill miscellaneous crops. Grass green part, control annual weeds, do not kill the root; the latter is conductive, can kill perennial perennial weeds, such as bermudagrass, imperata, sedges (Herbium) and so on. Such herbicides are passivated in the presence of soil and do not affect the sowing of corn.
Two seals: It is the second stage to control the weeds in corn fields, that is, after the sowing of corn (before emergence), the choice of triazines (such as atrazine) or triazines+amides (such as acetochlor and isopropyl A mixture of amines is sprayed to seal the soil. If there are many weeds unearthed in the field, then paraquat (without damaging the root and killing only the green part of the ground) or glyphosate can be added to the selected herbicide depending on the situation. (Conductively killing roots) This type of phytotoxic herbicide is inactivated by soil and does not affect the emergence of corn. It must be carried out within 1-2 days after sowing of corn (while the sowing of summer corn is 4-5 days). Technology has been adopted by the majority of pesticide sellers and farmers.
Three kills: It is the third level to control the weeds in corn fields. After the emergence of corn, four weeds are used before. They belong to the control and treatment of weed stems and leaves, and they mostly use sulphonylureas (such as nicosulfuron) + Atrazine. Or triketones (mesotrione) + atrazine, the former herbicide varieties, corn seedlings after weeding more choice of this type, the latter less herbicide species, the people choose less. The former should pay attention to the use of corn before the 5 leaves, because the corn 5 leaves before this type of herbicide resistance is stronger, corn 5 leaves after use, to carry out directional spray between the corn line; if the field Aconite (Sedge) compared In many cases, phenoxy carboxylic acid herbicides can be used to prevent and control. Other types of herbicides have poor effects on Perilla frutescens. Dicotyledonous crops such as cotton and vegetables must be banned. If there are more fields in the corn field, chlorofluoroacetic acid can be used for spraying control, and other herbicides do not work well.
Four supplements: This is the last stage of control of weeds in corn fields, that is, weeding between corn rows. At this time, corn has grown taller and weeds are larger, and corn is more than 60-80cm. Corn and weeds have certain levels. For height differences, we can use sulphonylurea herbicides or this mixture to spray weeds between rows of corn; sprays can also be selected with triketones or mixtures. At this time, weeds are relatively large, the weeding effect is relatively poor, and it is easy to make corn produce phytotoxicity. Weeds are sprayed on the weeds in a targeted manner to minimize damage to the corn; the herbicide paraquat, which is a non-productive herb, can also be used. Kill the green part of the ground), glyphosate (good conduction rootkill effect), glufosinate (poor root conduction effect, safer corn) targeted directional spray of weeds. This is the last remedy for controlling corn weeds. Be careful when handling it.
To stop
That is, the use of all organic phosphorus pesticides (such as omethoate, dichlorvos, chlorpyrifos) is eliminated within 7 days before and after the chemical herbicide spraying in the corn field, because the organic phosphorus pesticides inhibit and slow down the herbicides that the corn decomposes itself. The ability to easily cause drug damage, corn herbicides are mostly such phytotoxicity. If pests (Puma, Laodelphax striatellus, etc.) are to be balanced, they can be mixed with pesticides such as pyrethroids.
Four off
One off: It is the first stage of control of weeds in corn fields. After harvesting, if more weeds have been unearthed in the field, the herbicides such as paraquat and glyphosate can be used to kill. The former can kill miscellaneous crops. Grass green part, control annual weeds, do not kill the root; the latter is conductive, can kill perennial perennial weeds, such as bermudagrass, imperata, sedges (Herbium) and so on. Such herbicides are passivated in the presence of soil and do not affect the sowing of corn.
Two seals: It is the second stage to control the weeds in corn fields, that is, after the sowing of corn (before emergence), the choice of triazines (such as atrazine) or triazines+amides (such as acetochlor and isopropyl A mixture of amines is sprayed to seal the soil. If there are many weeds unearthed in the field, then paraquat (without damaging the root and killing only the green part of the ground) or glyphosate can be added to the selected herbicide depending on the situation. (Conductively killing roots) This type of phytotoxic herbicide is inactivated by soil and does not affect the emergence of corn. It must be carried out within 1-2 days after sowing of corn (while the sowing of summer corn is 4-5 days). Technology has been adopted by the majority of pesticide sellers and farmers.
Three kills: It is the third level to control the weeds in corn fields. After the emergence of corn, four weeds are used before. They belong to the control and treatment of weed stems and leaves, and they mostly use sulphonylureas (such as nicosulfuron) + Atrazine. Or triketones (mesotrione) + atrazine, the former herbicide varieties, corn seedlings after weeding more choice of this type, the latter less herbicide species, the people choose less. The former should pay attention to the use of corn before the 5 leaves, because the corn 5 leaves before this type of herbicide resistance is stronger, corn 5 leaves after use, to carry out directional spray between the corn line; if the field Aconite (Sedge) compared In many cases, phenoxy carboxylic acid herbicides can be used to prevent and control. Other types of herbicides have poor effects on Perilla frutescens. Dicotyledonous crops such as cotton and vegetables must be banned. If there are more fields in the corn field, chlorofluoroacetic acid can be used for spraying control, and other herbicides do not work well.
Four supplements: This is the last stage of control of weeds in corn fields, that is, weeding between corn rows. At this time, corn has grown taller and weeds are larger, and corn is more than 60-80cm. Corn and weeds have certain levels. For height differences, we can use sulphonylurea herbicides or this mixture to spray weeds between rows of corn; sprays can also be selected with triketones or mixtures. At this time, weeds are relatively large, the weeding effect is relatively poor, and it is easy to make corn produce phytotoxicity. Weeds are sprayed on the weeds in a targeted manner to minimize damage to the corn; the herbicide paraquat, which is a non-productive herb, can also be used. Kill the green part of the ground), glyphosate (good conduction rootkill effect), glufosinate (poor root conduction effect, safer corn) targeted directional spray of weeds. This is the last remedy for controlling corn weeds. Be careful when handling it.
To stop
That is, the use of all organic phosphorus pesticides (such as omethoate, dichlorvos, chlorpyrifos) is eliminated within 7 days before and after the chemical herbicide spraying in the corn field, because the organic phosphorus pesticides inhibit and slow down the herbicides that the corn decomposes itself. The ability to easily cause drug damage, corn herbicides are mostly such phytotoxicity. If pests (Puma, Laodelphax striatellus, etc.) are to be balanced, they can be mixed with pesticides such as pyrethroids.
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