Methyl disulfonate herbicide can prevent and control weeds such as Japanese myrtle, Pennisetum, Kentucky bluegrass, ryegrass, poisonous w
Methyl disulfonate herbicide can prevent and control weeds such as Japanese myrtle, Pennisetum, Kentucky bluegrass, ryegrass, poisonous wheat, Aegilops tauschii, candelilla frutescens, shepherd's purse, descurainia sophia, chickweed and autogenous rape. Usually, after 2-4 hours of application, the absorption of sensitive weeds will reach the peak and stop growing after 2 days. The leaves began to turn yellow 4-7 days after application and died 2-4 weeks later.
A, methyl disulfonate herbicide in addition to what grass?
1, which can control wild oats, Pennisetum, Kentucky Bluegrass, Lolium multiflorum, Suaeda salsa, Bromus, Poisonous Wheat, Aegilops tauschii, Candelilla frutescens, Agropyron cristatum, Swallow Grass, Leymus chinensis, offspring, Stellaria straminea, spontaneous rape and so on. The original drug of methyl disulfonate is milky white fine powder, slightly spicy, and belongs to high-efficiency sulfonylurea herbicides. By inhibiting the action of acetolactate synthase, weeds are absorbed by roots and leaves and transmitted in plants, so that weeds stop growing and then die.
2. Methyl disulfonate herbicide is mainly transmitted through phloem and xylem, absorbed by plant stems and leaves, and a little absorbed by soil, which hinders the synthesis of branched-chain amino acids and inhibits the activity of acetolactate synthase in sensitive plants, thus inhibiting cell division and leading to the death of sensitive plants. Usually, the absorption of sensitive weeds will reach the peak after 2-4 hours of application and stop growing after 2 days. After 4-7 days of application, the leaves will turn yellow, then withered spots will appear and die after 2-4 weeks.
Second, the use of methyl disulfonate herbicide matters needing attention
1. The herbicide metsulfuron-methyl is improperly applied in wheat fields, which is easy to cause phytotoxicity. It should be sprayed evenly in strict accordance with the recommended application period, dosage and method, and it is not allowed to exceed the scope or use excessively, and it is not allowed to spray repeatedly or miss spraying.
2. Different wheat varieties have different sensitivities to methyl disulfonate herbicide. Keratinous durum wheat is relatively sensitive, but under appropriate conditions, different wheat varieties can usually be weeded with methyl disulfonate.
3. In production, if water accumulates in low-lying areas in rainy days and the fields are too wet, or wheat seedlings are harmed by freezing injury, waterlogging injury, plant diseases and insect pests, saline-alkali injury, plant malnutrition, etc., it is not allowed to use drugs, and wheat cannot be used after jointing or plant height 13 cm, otherwise it is easy to produce phytotoxicity. There should be no stagnant water in the field when applying pesticide, and no flooding should be carried out within 2 days before and after applying pesticide to avoid phytotoxicity. If there is heavy rain and frost within 4 days after application, it is easy to cause phytotoxicity. Applying methyl disulfonate under freezing conditions is easy to cause phytotoxicity, resulting in short and yellow leaves of wheat and even serious seedling death.