The rice transplanting fields in the north were developed rapidly in the 1980s with the use of drought-cultivation, sparse planting techniques, and the use of herbicides. Weeds in paddy fields have different types of weeds due to different planting years, due to the continuous cropping of northern rice. Unreasonable use of herbicides and cultivation techniques, the problem of increasing weeds in paddy fields and aggravating damages such as: Echinochloa Oryzicola), Monochoria korsakowii, Sagittaria Sagittifolia), Potamogeton distinectus, Eleocharis Yokoscensis) Scirpus juncoides, Scirpus Nipponicum), Scirpus planiculmis, (triangle grass) (Scirpus Triqueter), Bidens tripatita, Spirogyra Crassa) etc. Lecrsia oryzoides, Agrostis Stolonifera) has a tendency to increase the spread and harm. In the production practice, two or more herbicides are used together to solve the damage of weeds in rice transplanting fields, especially the prevention and treatment of weeds. Phenyldanacetamide, which controls 500 g of active ingredients per hectare before 1 leaf stage, and 750 g of active ingredients per hectare before controlling 2 leaf stage, needs to be controlled every hectare before 3 leaf stage. 1000 grams of active ingredient. Because of the low cost of using a mixture of fenostamolam and bensulfuron methyl compared with piroxysulfuron, 53 manufacturers have registered 53 different formulations of benzyl benzyl azide benzyl mixed formulations, the general recommended dosage is low, in the north The efficacy of weeds such as Spirogyra, Wolfweed, Sagittaria undifolia, Japanese grass, etc. is not as good as that of the combination of phenothizolide plus azosulfuron-methyl. The chloroquine acid used 250-400 grams of active ingredient per hectare in rice transplanting fields. It can control 250g of active ingredient per hectare before the 3rd leaf stage of barnyard grass and barnyard grass at the 1-8 leaf stage. In the leaf stage, 300 grams of active ingredient is used per hectare and in the 6-8 leaf stage of barnyardgrass, 350-400 grams of active ingredient is used per hectare. Dichlorobenzyl (bischloroquinolinic acid plus bensulfuron-methyl) dichloropyrrolid (chloroquinolinic acid plus azosulfuron-methyl) mixed formulation, using bensulfuron-methyl and pyrazosulfuron-methyl before the 1.5-leaf stage of barnyardgrass Effective against alfalfa, can reduce the amount of quinacryline. After the 1.5-leaf stage of Pteris viridis, bensulfuron-methyl and pyrazosulfuron-methyl have lost the control effect on Pteris viridis. It is necessary to increase the dosage to effectively control Pteris vittata, because of the mixed formulation, bensulfuron-methyl and pyrazosulfuron-methyl are also followed. Increase usage without economy. Dichlorobenzyl and dichloropyrimidine are recommended for the early stage of the three-leaf stage of early barnyardgrass after rice insertion. The higher cost cannot compete with butachlor, pretilachlor, saliphatic phosphate, and phenothizolide herbicides. There are problems with the use of dichlorobenzyl and dichloropyrimidine, and some manufacturers have wrongly recommended the application of poisonous soil method, which often causes large area failure. Salbutamol (Salmonium Phosphate + Bensulfuron-methyl) is not as effective as Spirogyra, Wolffoil, Flatrod, and Grass, and its efficacy is not as good as that of Shapiro (Salmonium + Picazosulfuron). To Shi and Fanging (Shaoxanthin + ethoxysulfuron) efficacy better than Sha Bet. Shakoodan (2 A 4 Cl + Clomazone) is well-mixed and effective for perennial sedge weeds. Putianjing (grassine + 2A 4 Cl + Clover) is an excellent herbicide for paddy weeding. Butyl benzyl (butachlor + benzyl mercaptosulfuron) has poor efficacy against Spirogyra, Wolfweed, and Perennial Cyperaceae, and its efficacy is inferior to butylpyridine (butachlor+pyrosulfuron). Mini Ultrasonic Cleaner,Diy Ultrasonic Cleaner,Skymen Ultrasonic Cleaner,Best Ultrasonic Cleaner Dongguan Jinwang Ultrasonic Equipment Co.,Ltd , https://www.jwultrasonic.com
Effect of Mixture of Herbicide Mixture in Transplanting Rice Field in Northern China
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