1. Material: Pavement sign boards are typically made of durable materials such as aluminum, steel, or plastic. Pavement Sign Board,Pavement Board Signs,Pavement Advertising Boards,Swinger Pavement Signs SUZHOU JH DISPLAY&EXHIBITION EQUIPMENT CO.,LTD , https://www.jh-snapframe.com
2. Size: The size of pavement sign boards can vary depending on their intended use. They typically range from 18 inches to 36 inches in width and 24 inches to 48 inches in height.
3. Weight: The weight of pavement sign boards can vary based on the material used. Aluminum sign boards are lightweight, while steel and plastic sign boards can be heavier.
4. Shape: Pavement sign boards are typically rectangular in shape, but can also be square or circular.
5. Graphics: Pavement sign boards can be printed with graphics or text on one or both sides. Graphics can be printed using a variety of methods, including vinyl graphics, digital printing, or screen printing.
6. Frame: Pavement sign boards may have a frame that holds the sign in place and provides stability. Frames can be made of the same material as the sign board or can be a different material.
7. Base: The base of pavement sign boards can be weighted to provide stability in windy conditions. Some pavement sign boards have a water-filled base, while others have a sand-filled base.
8. Weather resistance: Pavement sign boards are designed to withstand outdoor weather conditions, such as rain, wind, and sunlight. Some sign boards are treated with UV-resistant coatings to prevent fading.
9. Portability: Many pavement sign boards are designed to be portable, with wheels or a handle for easy transport. This makes them ideal for businesses that need to move their signage around frequently.
The estimated area of ​​crop pests and diseases increased by 9.7% in 2017
[ China Agricultural Machinery Industry News ] Recently learned from the Ministry of Agriculture, according to the national crop pest monitoring network monitoring survey and expert analysis, crop pests and diseases are re-emerged in 2017, the expected area increased by 9.7% over the previous year. In this regard, the Ministry of Agriculture reminded and urged all localities to further promote pesticide reduction and efficiency, and strive to reduce the damage caused by pests and diseases.
The estimated area of ​​crop pests and diseases increased by 9.7% in 2017
Migratory pest re-emergence threatens. The occurrence period of the "two-shift" pests of rice increased in advance and occurred in generations. In the Yangtze River basin and most of the southern rice areas, rice planthoppers occur more or more, and the area of ​​occurrence is 27.5% higher than that of the previous year. Rice leaf roller is more important in the southeast coast, the middle and lower reaches of the Yangtze River and the riverside lakes in the south of the Yangtze River. It increased by 26.6% over the previous year. The armyworms were moderately heavy in the maize producing areas such as Huanghuai, North China and Northeast China. Local high-density concentration hazards may occur, and the area increased by 10.6% compared with the previous year. East Asian migratory locusts, Tibetan locusts, and Asian locusts continue to be moderately light. However, there may be high-density plutonium hazards in the Bohai Bay Reservoir, along the Huangtan District, the Yalong River and the Jinsha River Valley.
The prevalence of airborne diseases is high. Wheat scab is persistently prevalent in the middle and lower reaches of the Yangtze River, Jianghuai, and Huanghuai. The area of ​​prevention and control needs to be basically the same as that of the previous year; wheat stripe rust is in Jianghan Plain, Hanshui River Basin, South Huanghuai, Northwest and Southwest. Some wheat areas are prevalent and the area is 31.3% higher than that of the previous year. The incidence of rice blast in the southwest, south of the Yangtze River, the middle and lower reaches of the Yangtze River and the northeastern part of the rice area is more than 20.0%; the potato late blight is in the southwest. The eastern part, the northeastern part of the northeast, the northern part of North China and the northwestern part of the country continued to be more prevalent, and the area of ​​occurrence was basically the same as that of the previous year. Rice false smut is severely prevalent in the south of the Yangtze River, the middle and lower reaches of the Yangtze River, and the northwestern part of the country, and the area is 33.3% higher than normal.
The persistent pests continue to re-emerge. The wheat aphids were heavier or larger in the main wheat producing areas, northwestern and southwestern wheat areas of Huanghuaihai, and the area of ​​occurrence was 12.0% higher than that of the previous year. Rice aphids occurred in the southern rice areas of Jiangnan, and the middle and lower reaches of the Yangtze River and the Yangtze River were single and double seasons. The rice-growing area, the southwestern part of the country, and the northwestern part of the Yangtze River and the Huaihe River area were heavier, and the area increased by 15.8% compared with the previous year. Rice sheath blight occurred in some parts of the Yangtze River and the middle reaches of the Yangtze River, and most other southern rice areas occurred. The area increased by 1.8% over the previous year; corn mash was mainly or mostly occurred in most of the northeast, northwest and southwest, and most other corn producing areas occurred moderately, with an increase of 5.3% over the previous year.
In this regard, the Ministry of Agriculture reminded and urged all localities to implement anti-disease and pest control actions through measures such as monitoring and early warning, green prevention and control, unified prevention and control, scientific use of drugs, supervision and guidance, and further efforts to reduce pesticides and increase efficiency, and strive to reduce pests and diseases. loss.