The promotion of rice light cultivation techniques such as direct seeding rice has the advantages of high yield, labor saving and other advantages, and is easily adopted by farmers. It has been expanding year by year in the southern rice area, and it is widely used in both early rice and late rice areas. However, with the promotion of this technology, the harm of the malignant weeds in the rice fields has risen to one of the main weeds year by year. The hazards in throwing rice fields are also quite common. The main reason is that the dry and wet environment in the early stage of paddy fields is conducive to the occurrence of thousands of gold weeds. This is an important reason for the aggravation of thousands of gold. :
Main morphological features. Thousands of gold are annual weeds of the genus Gramineae, with strong vigor and strong fertility. It is almost identical to valerian before the 5-leaf stage. The leaves are smooth and hairless, but there are membranous ligules in the occipital lobes. After the 6-leaf stage, the scorpion grows, the stems are rooted, and branches begin to form. shape. Thousands of gold stalks are brittle and fragile, and the leaf color is similar to that of rice leaves. Manual extraction is difficult. The weeds are 30-90 cm tall, the stems are thin and erect, the base is knee-curved, the leaves are lanceolate, the sheath is glabrous, and the leaves are membranous. In recent years, it has become the main grass damage of live field and throwing fields, and the damage is more than sedge. In some places, quinclorac and bensulfuron-methyl have no effect on the control of Qianjin, and the control effect is very poor, which makes it one of the main weeds in rice fields. Many rice areas have become the dominant weed population in rice fields. More worthy of attention, we must strengthen prevention and control to ensure high yield and good harvest of rice.
Control measures. 1. Prevention after sowing. The key to prevention and control of thousands of gold is to prevent and control in a timely manner. Generally, it is planted for 2-4 days. 40% of live WP can be used for 45-69 grams per acre or 30% of Swift emulsifiable concentrate is 100 ml per acre, and 30-40 kg of water is sprayed. In the germination stage of weeds, the effect is best, but it must be noted that it is germination sowing, blind valley seed fields should not be used. The application of the field requires flatness. The application must be kept moist for 3 days after application, and the control effect on Qianjin is over 95%. Or 1-4 days after the germination of rice seeds, the main attack of thousands of gold, valerian and other weeds, can use 30% acetochlor EC 100-120 ml per mu. Add 10% bensulfuron-methyl powder 15-20g, spray evenly on water 45kg, the second time in 2 leaves 1 heart to 3 leaf stage, 12-13 days after sowing, choose benzothiazide or butyl bromide powder Mix with urea and keep the water for 5-7 days to kill the weeds of the second grassy peak of the weeds and broadleaf weeds. After sowing and weeding, it is impossible to crack the surface of the field and cause damage to thousands of gold. 2. In the case of pre-existing treatment of thousands of gold, it can be used in the 2-3 leaf stage of the thousand gold, 60-100 ml of 10% cyhalofoprin emulsifiable concentrate per acre, and 100-150 per acre in the 3-5 leaf stage. ML, 150-200 ml per acre at the 5th leaf stage, 30-40 kg per mu of water, high concentration fine spray, adding silicone additives in the liquid solution is beneficial to improve the control effect. When applying the pesticide, the surface water layer should be less than 1 cm or drained (maintaining the soil moisture in a state of saturation, so that the weeds grow vigorously, ensuring control effect), and watering 24 hours after application to prevent new weeds from germination. The drug can be mixed with drugs such as penoxsulam, quinclorac, and pretilachlor. The combination of cyhalofoprin with a herbicide such as metformin, bentazone and sulfonylurea that can control broadleaf weeds may have an antagonistic effect, and the performance of cyhalofoprin may be reduced, and it may be mixed. Appropriately increase the amount of cyhalofop. In order to control broadleaf weeds and sedges in rice fields, it is preferred to apply herbicides for controlling broadleaf weeds after 7 days of application of cyhalofop. Or in the 2-3 leaf stage of the thousand gold, use 10% of the golden emulsion 40-50 ml per acre, spray evenly on the water 30-40 kg, drain the field water before application, make the weeds out of the water surface, 48 hours after the medicine Shallow shallow water, more than 90% control effect on thousands of gold. 3. Prevention and treatment in the first and second stages when the treatment is not satisfactory or the control effect is not ideal. Thousands of gold begin to divide and grow, and when branching, you can take late remedial measures. You can use 6.5% Weiba 750 times solution for stem and leaf treatment. When applying, you must implement the principle of seeing grass and fight drugs. Avoid spraying in the whole field to prevent re-spraying. Otherwise, it is easy to produce phytotoxicity. Generally, 3-4 days after the medicine, the gold begins to become yellow and die, and the control effect is almost 100%. In the prevention and treatment of 7-8 leaf stage, it is also possible to use 10% anti-golden emulsifiable concentrate of 60 ml per mu, and the dosage should not be increased to prevent the occurrence of phytotoxicity. When the control is carried out, the field is free of water or only shallow water layer, and the medicine is guaranteed. The liquid can be sprayed onto the stems and leaves of thousands of gold.
More pesticide knowledge , please pay attention to China Pesticide Network
The Elevator Cabin System is generally composed of cabin bottom, cabin wall, cabin roof, cabin door and other main parts. It is the cabin body part used by the elevator to carry passengers or goods and other loads. With the development for several years, our company has stored more than twenty kinds of patterns. We just choose some of them to show here for your reference. China Elevator Cabin System, Cabin Service Controller manufacturer, high quality Passenger Cabin System, Elevator System, etc.
Elevator Cabin System,Cabin Service Controller,Passenger Cabin System,Elevator System
Suzhou Stable Trade Co., Ltd , https://www.stable-elevator.com