Chinese common name: dicaokuai

English common name: diquat dibromide monohydrate

Product Name: Lishou Valley

Chemical name: 1,1 ‘- ethylene-2,2’ – bipyridine dibromide (Monohydrate)

CAS No. 6385-62-2

Molecular formula: C12H14Br2N2O

Relative molecular weight: 362.06

Physical and chemical properties

The pure product is colorless to pale yellow crystal, with vapor pressure < 0.01Mpa, density of 1.61g/cm3, solubility in water (20 ℃) of 700g / L, slightly soluble in ethanol and carbonyl solvents, and insoluble in non-polar organic solvents. Stable in acidic and neutral solutions, but unstable in alkaline conditions.

Toxicity:Moderate toxicity

Main dosage forms: 150g / L, 200g / L diquat fast acting agent, 20% diquat fast acting agent

Application Technology

Rice

5-7 days before harvest, 30-40g of diquat quick mixed water leaf spray is used per mu. Generally, the amount of chemical solution per mu is 25-50kg, which can promote the drying of leaves and seeds, facilitate manual or combined harvesting, and reduce the drying process.

Potato

10-15 days before harvest, 40-50g of diquat fast mixed with water spray per mu can dry the leaves and facilitate harvest.

Rape

During the period from rapeseed pod to yellow ripening (about 7 days before harvest), the water content of rapeseed pod and seed can be reduced by 52.66% and 24.84% respectively with 25G diquat mixed with water leaf spray per mu. It has no significant effect on the germination rate, 1000 grain weight and quality of rapeseed. Moreover, the residue of diquat in rapeseed seeds stored for 14 days is 0.13mg/kg, which meets the safety standards of China and Britain. No diquat residue was detected after storage for 21 days.

Flax

When 80% of the flax capsules turned yellow brown, spraying 40g of diquat mixed with water per mu could reduce the water content of plants and seeds by 48.36% and 39.13% respectively. At the same time, spraying dicaokuai has no significant effect on the 1000 seed weight and germination rate of flax seeds, but it can significantly increase the oil content and linolenic acid content of flax, and significantly reduce the oleic acid and stearic acid content, thus improving the quality of flax.

Precautions

①The liquid medicine should be sprayed evenly and thoroughly to ensure the effect;

②The chemical solution sprayed on the mature stem or bark has no effect, and the chemical solution is passivated immediately after contacting the soil, without affecting the root of the crop;

③For drying and drying, it can be used at most once a season, with a safe interval of 5-10 days.