Fluorine herbicide use technology
Fluorine is commonly used in pre-emergence soil treatment because it is volatile, easy to photolyze, has very low water solubility, is not easy to move in soil layer, and has a long-lasting effect. It is mainly used in weed sheath of weeds. The hypocotyls absorb and act, and are ineffective against excavated weeds, but are also effective against broadleaf weeds of gramineae and some small seeds. The following is a detailed introduction by the China Pesticide Network :
1. Fluorine weeding technology:
1. Control objects: annual monocotyledon weeds, small grain dicotyledon weeds. Such as 稗, 马å”, foxtail, wild leek and so on.
2, the scope of application:
(1) Live vegetables: carrots, celery, rack beans, kidney beans, peas, and edamame are used before sowing. Chinese cabbage and radish are used for 4-7 days before sowing.
(2) transplanting vegetables: eggplant, pepper, cabbage, cauliflower used 1-3 days before planting, tomato 3-7 days.
(3) Usage: 2-3 per mu, there are only 2 two mulch, 40 kg water, evenly sprayed on the soil surface, then nailed shallow soil 3-5 cm.
3, note:
(1) Fine - fine ground, small clods.
(2) Flat - smooth surface.
(3) Foot - bottom water foot.
(4) Quasi - the dose should be accurate.
(5) Uniformly - spray evenly, not heavy or leaking, spray the ground at the edge of the ditch. Wash the sprayer after use.
(6) Shallow - timely mixing 3-5 cm.
(7) Real - the membrane soil is close.
(8) Small - opening a small hole, anti-gas affects the seedlings.
(9) Separation - transplanting tomatoes, live cruciferous vegetables, transplanting and sowing in 3-7 days.
(10) Forbidden - Asteraceae and Cucurbitaceae are banned, and spinach and melons cannot be used. After use, the phytotoxicity was found. See root thick, short, no lateral roots, and should be irrigated several times in time. Keep the drug in the dark.
Second, the symptoms of trifluralin poisoning
1. Initial symptoms of poisoning: First, there are symptoms of digestive tract and neurotoxicity such as nausea, vomiting, dizziness, excessive sweating, fatigue and blurred vision.
2. methemoglobinemia and hemolysis: due to the production of the aforementioned metabolites, methemoglobinemia occurs, clinically seen clinical cyanosis, chest tightness, shortness of breath and difficulty breathing, severe cases can still be accompanied by hemolysis.
The article was published by the China Pesticide Network , please indicate the source!
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