Wang Xiaogui, Lugou Town, Jianhu County, said on the 6th of December that there are a lot of grasses and aunts in 13~14 acres of wheat fields in the local area, with 8% clodinafop-propargyl esters per acre in the weeds of 1 to 2 leaves (Zhejiang Yifan Chemical Co., Ltd. product) 80 ml water 30 kg spray, and now the field still has 2 to 4 leaf stage grass and look Mai Aunt. It is understood that when the medicine is used, the grass does not come out. After the medicine is used, some weeds are dead, and some do not die. He asked if clodinafop-propargyl was not effective against grass and aunt Mai.

Clodinafop-propargyl is a selective post-emergence systemic herbicide that can effectively control agrimony in wheat fields, Japanese amaranth, wild oats, hardgrass, grasses, and stickhead weeds. The roots, stems, and leaves of weeds are absorbed and transported in the xylem and phloem, accumulate in the meristem, and block the branched-chain amino acids such as valine, leucine, and isoleucine by inhibiting plant acetolactate synthase. Biosynthesis, which disrupts the synthesis of proteins, interferes with DNA synthesis and the division and growth of cells, ultimately resulting in plant death. Sensitive weeds ceased growing within hours of stem and leaf treatment and weeds died after 24 days. The efficacy is not affected by temperature. The 8% clodinafop-propargyl ester registered by Zhejiang Yifan Chemical Co., Ltd. is used for the control of grassy weeds in wheat fields. The recommended dosage is 25~37.5 ml per acre.

Different types of weeds have different sensitivities to clodinafop. See aphrodisiac, wild oats and other weeds sensitive to the drug, can achieve good control effect at lower doses; hard grass, weeds and other weeds are more resistant to drugs, especially in the grass more than 4 leaves After the period, you need to increase the amount to ensure control efficiency.

In the above plots, in the period of 1 to 2 leaves of the grass and the aphrodisiac, spraying 8% clodinafop-propargyl with 30 kg of water per acre, the dosage is high, the weeds are of a small age, and a good control effect should be obtained. . Clodinafop-propargyl is a stem and leaf treatment agent, effective only for the weeds that have been excavated, and it is not effective against un-earthed weeds. The weeds were in the 1 to 2 leaf stage during the field application. It is estimated that the weeds are still unearthed. After the application, the weed seeds are gradually emerged, and a large amount of weeds may still occur in the field. In addition, the recent field soil drought, a small amount of weed growth, spraying the stem and leaf treatment agent when the drug is not easy to spray on the weeds, or the effect of drug effects are affected, but also affect the control effect.

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