Lolium multiflorum is an annual gramineous forage grass, native to Europe, warm and humid climate, low temperature resistance, salt and alkali resistance, strong ability to reproduce tiller, can be used for multiple harvests, and has high protein content. It is used to feed cattle and pig rabbits. Goose and other herbivorous livestock and grass species, introduced in many places throughout China. In pasture planting areas, ryegrass gradually shifts to wheat fields due to artificial or soil erosion, and its reproductive ability is very strong. Under normal growth conditions, there can be more than 60 tillers for a single multi-flowered ryegrass. More than 15,000 grains lead to more and more serious damage. Recognition features The identification of seedlings of Lolium multiflorum seedlings mainly through three aspects. One is that the leaf sheath of the seedling base is bright and dark brown, smooth and hairless, and the upper leaf sheath is green. The second is that the leaves are dark green and have a thick layer of wax on the surface. They are shiny and not easily contaminated with water droplets. The third is the loosening between the leaf sheath and the stem. In this phase, the lingual tongue is small or not obvious. The adult plants of ryegrass were more different from other weeds and wheat. The leaves were dark green, flat and glabrous. The veins and leaves were rough and slightly rough. The lingual tongues grew up to 4 millimeters. The stems were stiff and upright, and the stem segments were red-brown and slightly swollen. The flowering spikes of ryegrass plants after flowering are much higher than wheat and can be clearly seen in the field. The flower spikes are general curved inflorescences with a wavy curved cob, spikelets containing 10 to 15 florets, spikelets with short or no spikes, and crowded flowers, so they are called ryegrass. Control method Because of the high reproductive power of Lolium multiflorum and its natural resistance to many herbicides in wheat fields, it is very difficult to control. Many years ago, clodinafop-propargyl had better effect on its control. Due to long-term use, the resistance developed rapidly in recent years. In some areas, clodinafop-propargyl esters had poor effect of controlling ryegrass. Therefore, measures must be taken to combine soil sealing and stem-leaf treatment during production control. Soil sealing treatment for early sowing of field plots can be done with 50% isopropylene wettable powder or 50% green wheat isoproturon wettable powder at temperatures above 5°C. These two drugs are entrapped soil-enclosed and stem-leaf treatment agents that can be absorbed by the roots of weeds, conduct and accumulate in the leaves, inhibit photosynthesis, and cause weed death. Do not use these herbicides at temperatures below 5°C. Stem and leaf treatment Ai Xiu 5% oxazoline emulsifiable concentrate and Da Neng 5% azoline clodinafop-propellent can effectively control the ryegrass in wheat fields. Before winter, weeds in the 2 to 4 leaf stage of the weed control have the best efficacy, and we need to increase the amount when the spring grass age is large. Methylsulfuron, imidazolam, and flurazoxuron also have certain control effects on Lolium multiflorum. They should be used strictly according to the recommended dose and method when applying pesticides. They should be kept in the 3 to 6 leaf stages of wheat before winter and grasses. Weeds had the best effect at the 2 to 4 leaf stage. Fabric With Pvc Coating,Nonwoven Pvc Material Fabric,Medical Protective Clothing Fabric,100% Polypropylene Nonwoven Fabric Shaoxing Weijian Medical Supplies Co.,Ltd. , https://www.wetourmedical.com
Pastures become weeds and ryegrass are more harmful
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