The turf base is a little more precious than ordinary grass, and this kind of grass weeding is not the same material. For this reason, what should be paid attention to when weeding the lawn base, let's take a look today!
Soil with high organic matter content has fine particles, large adsorption capacity for herbicides, and a large number of soil microorganisms, vigorous activity, and the dosage of pesticides is degraded, so the dosage can be increased appropriately; while sandy loam has coarse particles and small adsorption of pesticides. The medicament molecules are mostly free in the soil particles, with strong activity, simple phytotoxicity, and the dosage can be appropriately reduced. In addition, under the conditions of high temperature and rain, the drug users should be appropriately reduced; the lower limit of the dose should be used when the weeds are hours, and the upper limit should be used when the weeds are large. In order to seek the effect of weeding, increase the dosage at will, or mix the medicine unevenly (spreading), mixing too little water (spraying), or part of the concentration after respraying is too high, which simply causes plant phytotoxicity. In the manufacture of herbicides, it is necessary to manufacture according to the recommended dosage and concentration, manufacture according to the proportion, and weigh with the measuring tool to ensure the accurate dosage.
The correct selection of the time of application is different from the method of application. The sensitivity of weeds to herbicides during the growth period is different. As long as the drug is used in the most sensitive period, the best anti-killing effect can be achieved. Under normal circumstances, weeds are most sensitive to soil treatment herbicides at germination, and most sensitive to stem and leaf treatment herbicides at the 2--3 leaf stage. Regarding the off-type weeding penalty, it is necessary to apply it before the weeds emerge. Once the weeds have grown, the resistance to pesticides will be added and the weeding effect will be poor.
