Cyhalofop is a diphenyl ether herbicide . Selective herbicides in paddy fields can only be treated as stems and leaves, and pre-emergence treatment is ineffective. It mainly controls grass weeds such as valerian and Qianjin.
Cyhalofop is a uniquely safe variety of rice aryloxyphenoxypropionic acid herbicides, and like other varieties, it is also a systemic herbicide. It is absorbed by the leaves and sheaths of the plant body, and the phloem is transmitted, accumulates in the meristematic zone of the plant, and resists acetyl-CoA carboxylase (ACCase), which stops the fatty acid synthesis, and the cell growth and division cannot proceed normally. Destruction of the lipid structure eventually leads to plant death. The absorption from cyhalofoprin to weeds is relatively slow and usually takes 1-3 weeks. The symptoms of weeds after application are as follows: the buds in the four-leaf stage shrink and cause death. The old leaves in the two-leaf stage are extremely small and remain green.
Suitable crops and safety: rice (transplantation and direct seeding), has excellent selectivity to rice, and selectivity is based on different metabolic velocities. In rice, cyhalofop-butyl ester can be rapidly degraded to carboxylated acetyl-CoA. The enzyme is inactive in the diacid state and thus is highly safe for rice. Because of its rapid degradation in soil and typical paddy fields, it is safe for crops.
Control object: mainly used to control important grass weeds. Cyhalofop is not only effective for thousands of gold, various valerian (including older psyllium), but also for control, crabgrass, double-spotted gar, foxtail, goosegrass, and maiden. Ineffective for sedge weeds and broadleaf weeds.
Note: This medicine is highly toxic to aquatic arthropods and avoids inflow into aquaculture sites. When it is mixed with some broad-leaved herbicides, it may show antagonism, which is manifested as a decrease in the efficacy of cyhalofop.
Correct use:
1. The generic name cyhalofop-butyl
2, the product name Qianjin (Clincher)
3. Chemical name (R)-2-[4-(4-Cyano-2-fluorophenoxy)phenoxy]propionic acid butyl ester
4. The physical and chemical properties of the preparation are 110 grams (10.4%) of gold-containing original drug per liter, yellow-orange liquid, specific gravity of 0.989, and storage stability period of 2 years.
5, the preparation of 10% Qianjin emulsifiable concentrate
6, the action characteristics of thousands of metals in non-toxic or very low toxicity, aryloxyphenoxypropionic acid is highly safe for rice, a systemic herbicide. It is absorbed by the leaves and sheaths of plants, and is transmitted to the phloem. It accumulates in the meristematic region of the plant, inhibits the ethylene-CoA carboxylase, stops the fatty acid synthesis, prevents the cell growth and division, and destroys the ester system such as the membrane system. Eventually it leads to plant death. After the weeds absorb the gold, the death rate is slow, and it usually takes 1-3 weeks. In rice, it can be rapidly degraded into a diacid state which is inactive to ethylene coenzyme A carboxylase. Therefore, Qianjin is highly safe to rice.
7, for crop rice
8, control objects scribbled, thousand gold
9, application technology stem and leaf spray, toxic soil method is not effective. Yuyutian is applied in the 1.5-2 leaf stage of Valerian, using 30% of 50% of the gold per acre (3-5 grams of active ingredient), 30-40 liters of water, and sprayed with stems and leaves. The live field, transplanted field, and throwing field are applied in the 2-4 leaf stage of Valerian, using 50% to 67 ml per 10 mu of water, and 30-40 liters of stem and leaf spray with water. Prevention of older psyllium should increase the dose. When using, pay attention to the rapid degradation of the first thousand gold in the soil and typical paddy field water. If there is no residue, it should be used as a soil treatment (poisonous soil or poisonous fertilizer method). When the second thousand gold is mixed with some broad-leaved herbicides, it may show antagonism, which is manifested as a decrease in the efficacy of the gold. Herbicide with no antagonistic effect with Qianjin is herbicide, Marshall (butachlor), chlorpyrifos, sulfonylurea, bentazon, etc., if needed, with broadleaf, Shake weed herbicide It is best to use broadleaf herbicide after 7 days of use. When the third application, the surface water layer is less than 1 cm or drained, and the soil moisture is saturated, which can achieve the best efficacy. The weed plant is 50% higher than the water surface and can achieve better results. The saturation of field water holding capacity in dry nursery field can ensure the strong growth of weeds, thus ensuring the best efficacy. Watering is applied 24-48 hours after application to prevent new weeds from germination. In dry conditions, the dosage should be increased as appropriate. The fourth 10% gold emulsifiable concentrate contains the best auxiliaries selected by Dow AgroSciences, and it is not necessary to add other auxiliaries when applying. The fifth uses a higher pressure, low volume sprayer.
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