WP 15% acetylene acid

1, the mode of action of oxalic acid and acetylene mechanism 

Acetylenic acid (English name Clodinafop-propargyl) Swiss Syngenta Crop Protection Limited development of chiral phenoxy acid fluoride efficiency and low toxicity herbicide, particularly effective for malignant weeds, and security agents to a certain percentage of mixed for cereal crops, such as the sage on the grass weeds, Alopecurus, wild oats, ryegrass, bluegrass, Setaria viridis, which are excellent anti-effect. Mode of action: the absorption of the broad-spectrum postemergence herbicide leaf weeds. Mechanism: the mechanism of propargyl ester grass plants for the inhibition of acetyl coenzyme A carboxylase activity, as the uptake and herbicide, the plant's leaves and leaf sheath absorption, phloem transfer, accumulated in the plant meristem , the inhibition of acetyl coenzyme A carboxylase, fatty acid synthesis to stop cell growth and division can not be normal, the membrane system, structural damage to fat, leading to plant death. 

2, acetylene acid pharmaceutical safety 

Acetylenic acid can rapidly degrade in the soil, almost no activity in the soil, had no effect on the succeeding crop. Using 60 g ai / ha of wheat stem and leaf spray can cause leaf yellowing, but can be restored after 20 days. In the recommended dosage range on wheat safety. The sensitivity of different varieties of wheat experiment showed that the sensitivity among the varieties of wheat was no significant difference. 

Formulation type: 15% acetylene acid WP. 

Control target: acetylenic acid grass weeds in wheat fields and efficient, stable stem postemergence treatment agent. Considered by some countries, prevention and control of Alopecurus, wild oat product of choice, on the other malignant weeds (barnyard grass, ryegrass, etc.) also has good control effect, but the control effect of brome is not ideal. 

3, the scientific use of acetylene acid 

(1) grass weeds in winter wheat before the combat. Winter before the weeds 2 to 4 leaves per 667 square meters (1 acre) with 15% acetylene WP 16 grams of oxalic acid, 30 kg of water spray. (2) after spring wheat grass weeds control. After the spring weeds 5 to 8 leaves per 667 square meters (1 acre) with 15% acetylene WP oxalic acid 24 grams, 30 kg of water spray, the field effect of comprehensive prevention is better than 6.9% of the Biao Ma regular dose. In addition, the acetylene acid can be mixed with the broad-leaved grass herbicides, and anti-efficient. But be sure to grasp the acetylene mixed amount of oxalic acid, oxalic acid and 240 grams of 15% acetylene / ha with 10% ethyl benzene, 150 g / ha isoproturon 1500 g / ha mixed, can effectively control grass and broadleaf crop weeds. 

4, acetylene physical and chemical properties of oxalic acid 

Appearance of light brown powder. Gravity (20 ℃, pure) 1.37g/cm3; melting point of 48.2-57.1 ℃; vapor pressure (25 ℃) 3.19 × 10-6Pa; solubility in water (25 ℃, pure) 4.0mg / l; organic solvents (25 ℃) acetone> 500g / l, methanol and 180g / l, toluene> 500g / l, n-hexane 7.5g / l, octanol 21g / l.