How to choose the correct herbicide in the vegetable field
2018-08-07 03:01:37
According to the type of herbicide and the type of vegetables, the herbicide is selected correctly, and the right medicine can be used to get twice the result with half the effort.
1. Choose herbicides according to the type of herbicide
First, herbicides have four types: endocytic conduction selectivity, contact-selective selectivity, systemic conduction-type extinction, and contact-killing. A systemic herbicide is a spray that is absorbed on a leaf of a plant and can be transmitted to another leaf, flower, fruit or root, or sprayed on the surface of the soil to be absorbed by the sprouting plant bud or root. To the leaves or flowers and fruits. Contact-type herbicide means that a leaf sprayed onto a plant, or even a part of a leaf, will not be transmitted to other leaves or other parts of the leaf, and will not be transmitted to roots, flowers and fruits. Similarly, contact herbicides sprayed on the surface of the soil are not transmitted to the leaves, stems and flowers by root or shoot absorption. For the selection of herbicides in vegetable fields, contact herbicides should be used as much as possible. If it is used, it should be used as a herbicide with poor conductivity in the systemic herbicides, such as Shi Tianbu.
Second, according to the treatment of herbicides, it is divided into stem and leaf treatment herbicides and soil treatment herbicides. Except for a small number of herbicides, stem and leaf herbicides generally do not produce residual effects in the soil after spraying. After spraying the herbicides, the soil will retain a considerable period of residual effect in the soil, ranging from one week to more than one year. Even longer. Leaf-leaf vegetables generally do not use stems and leaves to treat herbicides, and root-feeding vegetables generally do not need to deal with herbicides such as acetochlor and butachlor.
The third is the speed and duration of the herbicide retention in the plant until it is degraded to non-toxic by plant metabolism, which varies greatly depending on the herbicide. Strictly speaking, after the use of the systemic herbicide, it remains more or less in the plant. Therefore, the vegetable field should try not to use a systemic chemical herbicide.
Fourth, herbicides are generally classified into four categories: high, medium, low and slightly toxic. Except for sodium pentachlorophenol and paraquat, most herbicides are poisonous to slightly toxic. High and poisonous herbicides are strictly prohibited in vegetable fields. Some herbicides are low in toxicity but chronically toxic, teratogenic, carcinogenic and cause genetic mutations. It is strictly forbidden to apply these herbicides in vegetable fields, such as herbicides and cables.
2. Choose herbicides based on vegetable category
First, leaf-leaf vegetables, such as cabbage, cabbage, spinach, sage, and broccoli, generally do not use herbicides. If it is really necessary, you should choose Shi Tianbu and Guoer to treat the soil before planting. Spinach is not available with acetochlor.
The second is the edible stems, root vegetables, such as garlic, onions, radishes, carrots, potatoes, sweet potatoes, etc., in the early growth period of these vegetables, the use of soil treatment herbicides or the use of stems and leaves to treat herbicides after the seedlings, if, garlic, two No., Shi Tianbu, etc.
The third is fruit-eating vegetables, such as eggplant, tomato, pepper, etc. It is not advisable to treat herbicides with stems and leaves. Alternatively, contact herbicides can be used to treat herbicides.
Fourth, melon vegetables, such as cucumber, melon, bitter gourd, zucchini, etc., acetochlor is strictly prohibited. Because acetochlor has strong systemic conductivity, it has a longer residual effect in plants. You can use Shi Tianbu and Guoer to treat the soil before sowing.
1. Choose herbicides according to the type of herbicide
First, herbicides have four types: endocytic conduction selectivity, contact-selective selectivity, systemic conduction-type extinction, and contact-killing. A systemic herbicide is a spray that is absorbed on a leaf of a plant and can be transmitted to another leaf, flower, fruit or root, or sprayed on the surface of the soil to be absorbed by the sprouting plant bud or root. To the leaves or flowers and fruits. Contact-type herbicide means that a leaf sprayed onto a plant, or even a part of a leaf, will not be transmitted to other leaves or other parts of the leaf, and will not be transmitted to roots, flowers and fruits. Similarly, contact herbicides sprayed on the surface of the soil are not transmitted to the leaves, stems and flowers by root or shoot absorption. For the selection of herbicides in vegetable fields, contact herbicides should be used as much as possible. If it is used, it should be used as a herbicide with poor conductivity in the systemic herbicides, such as Shi Tianbu.
Second, according to the treatment of herbicides, it is divided into stem and leaf treatment herbicides and soil treatment herbicides. Except for a small number of herbicides, stem and leaf herbicides generally do not produce residual effects in the soil after spraying. After spraying the herbicides, the soil will retain a considerable period of residual effect in the soil, ranging from one week to more than one year. Even longer. Leaf-leaf vegetables generally do not use stems and leaves to treat herbicides, and root-feeding vegetables generally do not need to deal with herbicides such as acetochlor and butachlor.
The third is the speed and duration of the herbicide retention in the plant until it is degraded to non-toxic by plant metabolism, which varies greatly depending on the herbicide. Strictly speaking, after the use of the systemic herbicide, it remains more or less in the plant. Therefore, the vegetable field should try not to use a systemic chemical herbicide.
Fourth, herbicides are generally classified into four categories: high, medium, low and slightly toxic. Except for sodium pentachlorophenol and paraquat, most herbicides are poisonous to slightly toxic. High and poisonous herbicides are strictly prohibited in vegetable fields. Some herbicides are low in toxicity but chronically toxic, teratogenic, carcinogenic and cause genetic mutations. It is strictly forbidden to apply these herbicides in vegetable fields, such as herbicides and cables.
2. Choose herbicides based on vegetable category
First, leaf-leaf vegetables, such as cabbage, cabbage, spinach, sage, and broccoli, generally do not use herbicides. If it is really necessary, you should choose Shi Tianbu and Guoer to treat the soil before planting. Spinach is not available with acetochlor.
The second is the edible stems, root vegetables, such as garlic, onions, radishes, carrots, potatoes, sweet potatoes, etc., in the early growth period of these vegetables, the use of soil treatment herbicides or the use of stems and leaves to treat herbicides after the seedlings, if, garlic, two No., Shi Tianbu, etc.
The third is fruit-eating vegetables, such as eggplant, tomato, pepper, etc. It is not advisable to treat herbicides with stems and leaves. Alternatively, contact herbicides can be used to treat herbicides.
Fourth, melon vegetables, such as cucumber, melon, bitter gourd, zucchini, etc., acetochlor is strictly prohibited. Because acetochlor has strong systemic conductivity, it has a longer residual effect in plants. You can use Shi Tianbu and Guoer to treat the soil before sowing.
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