At present, most of the selected two types are gram-free and glyphosate (Nongda, Nongwang), etc., no trace is a contact-type herbicide , no systemic, can kill the green part of the ground of weeds, Root damage is small, and the effect period is short. Because the root system survives, it is conducive to soil and water conservation in tea gardens; glyphosate has systemic conductivity, which has a greater killing effect on weed roots and has a longer effect. In response to these characteristics, the chemical weeding of tea gardens can be rationally selected according to the specific conditions. The tea garden has a high terrain and requires attention to soil and water conservation. To keep grass and keep a small ecological environment, we should use weeds to eliminate weeds. The tea plantation is flat and annual. Grass or grass weeds are more, do not need to keep the grass, then choose glyphosate herbicide.
According to the morning and evening of the occurrence period of tea garden weeds, it can be roughly divided into two categories: spring grass (before June) and summer grass (after July). The number of spraying is generally 1-2 times a year, if more spring grass and summer grass It can be sprayed once in mid-May and late July. If there are few weeds, you can spray it once in July.
Spraying the herbicide with technology must be uniform. It is advisable to spray the weed without dew. It can't be rained for 12 hours after spraying. Otherwise, it needs to be re-sprayed. Glyphosate and gram-free have a great influence on the tea garden. If it is sprayed on the tree, it will cause the dead branches of the tea tree, dead trees or the leaves of the next year to grow in the shape of willow. Therefore, when spraying liquid, it should be noted that: 1 wind can not spray; 2 try not to use motorized sprayer, but use a backpack sprayer; 3 sprayer nozzle to install a plastic bowl to ensure a directional spray. It is strictly forbidden to spray the liquid onto the tea branches, stems and leaves.
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