Vegetables in autumn and winter are mainly white cruciferous, cauliflower, Chinese cabbage, and other vegetables. There are many types of diseases and pests, and prevention and control work is relatively complex. In order to do a good job of prevention and control of pests and diseases, we hereby propose the following comprehensive prevention and control opinions:
The Network Video Recorder 4K, also called the NVR 4K/ 4K HD NVR/ 4K NVR Kit/ NVR 4K CCTV/ NVR 4K System, means that this DVR has the resolution of 4K, 4096x2160, about 8.8 million pixels, which can achieve the movie level image quality, which is equal to more than four times the current top level 1080p resolution. As for 4K, the data volume of each frame has reached 50MB, so both the decoding playback and the editing require the top level configuration machines which also means the ultra-high-definition resolution and the high price.
What about the relationship between the Frame Rate and the Human Vision?
The time sensitivity and resolution of human vision vary, according to the types and characteristics of visual stimuli, and differ between individuals. The human vision system can process 10 to 12 images per second and perceive them individually, and the higher Frame Rates are considered the motions.
Network Video Recorder 4K, NVR 4K, 4K HD NVR, 4K NVR Kit, NVR 4K CCTV, NVR 4K System SHENZHEN SANAN TECHNOLOGY CO.,LTD , https://www.sanan-cctv.com
First, downy mildew
It mainly harms the leaves of vegetables such as cabbage, Chinese cabbage, cabbage and lettuce. At an even temperature of around 16°C and a relative humidity of more than 70%, even with overcast rain, the disease is very popular. Because parts of our city grow cruciferous vegetables all year round, the disease is circulating incessantly and continuously throughout the year.
Control methods: 1, with seed weight 0.3% of 25% metalaxyl wet powder seed dressing. 2, strengthen field management, deep trench high compartment, reasonable fertilization. 3, pharmaceutical selection: 60% extinguishing grams of wet powder 500-1000 times; 66.8% mildew wet powder 500-700 times; downy net wet powder 1000 times; 50% agrichemical wettable powder 500- 1000 times liquid. The above-mentioned medicament is applied once every 5-7 days, and applied 2-3 times.
Second, black rot, soft rot
Major hazards cabbage, cabbage, cabbage and other cruciferous vegetables. High-temperature and rainy weather are suitable for diseases, and the incidence of black rot is heavy when the pests are rampant. Its prevention method:
1. Seed soaking in warm water or soaking with streptomycin 1,000 times for 2 hours or 45% for 300 mg soaking for 15-20 minutes.
2. Strengthen the management of reasonable irrigation in the field, avoid injury of roots, prevent pests in time, find diseased strains of soft rot, remove them in time, and disinfect with quicklime.
3, the pharmaceutical selection of agricultural streptomycin 200PPM; 50% sterilization Wei water-soluble powder 1000 times; 53.8% can kill 2000 dry suspension 1000 times; 86.2% copper master wettable powder 600-1200 times. The above-mentioned agents are used at most 3-4 times, with a safety interval of 5-7 days.
Third, virus disease
Mainly through the propagation of locusts, high temperature and drought conditions are conducive to the disease. Its prevention and control methods are:
First of all, do a good job of prevention and control of locusts, and timely control of pesticides after the detection of diseased plants. Pharmacy selection: 3.95% virus will be wettable powder 600-700 times; 20% virus A wettable powder 400-600 times; 24% poison water-removing agent 1000-1500 times; 2% bacteria grams of drug g 500-1000 times liquid.
Four cruciferous vegetable pests
Plutella xylostella, Pieris rapae, Noctuidae pests and aphids are the main pests that harm the cruciferous vegetables in autumn and winter. Warm and little rain is suitable for insect pests. Its prevention techniques are:
1. Physical control techniques Use the repellency of pests to seduce. The first is to hunt and kill locusts in the field by hanging yellow plates or yellow tapeworm paper. The second is to use insect sex pheromones to trap and kill Plutella xylostella, Spodoptera litura and Spodoptera exigua. The third is to use the rotation of the insects for rotation and rotation, and the installation of frequency-vibration insecticidal lamps in large fields to carry out light trapping, which has a good effect on reducing the density of insect pests.
2. Biological Control Techniques Because vegetable pests occur more severely throughout the year, farmers often use more pesticides. In order to reduce the amount of pesticide residues in vegetables and achieve the goal of producing pollution-free vegetables, biopesticides should be vigorously promoted to prevent vegetable pests. Recommended use: "Green Crystal" 0.3% azadirachtin cream 1200 times; strong enemy -312 wet powder 1000 times; 1.3% Jixian Nong Fung cream 1500 times; 1.8% Ji Qi insects gram 1 1500 -2000 times liquid; Kono thousand wins (Bt insecticide) 600-1000 times liquid and so on.
3. Chemical Control Techniques The use of highly toxic, high-residue pesticides such as isocarbophos, methamidophos, carbofuran, dicofol, etc. should be strictly prohibited on vegetables, and the use of high-efficiency, low-toxic, low-residue pesticides should be promoted. Recommended Pharmacy: 1 Control of Plutella xylostella, Pieris rapae: 30% Avi kill single wettable powder 1000 times liquid; 24% Wan Ling Shui agent 1000-1500 times liquid; Periderm cream EC 1000-1500 times liquid; 15% hitting suspension agent 1500-2000 times liquid; 5% Ruijin special suspension agent 1500-2000 times liquid. 2 Control of aphids: 2.5% 500% of kiosfensin; 2% of aphid-killing oil 800-1000 times; 10% of imidacloprid WP 800-1000 times; 90% of Wanling 1500-2000 times of liquid . 3 Noctuidae pests: The key to prevention and control is based on the habit of infestation of the nocturnal larvae prior to the 2nd instar. Field investigations are conducted in time to find egg masses or larval populations, and they are pinched and removed from the sand window; larvae older than 4 years old It is harmful at dusk, so the application should be done at dusk. Pharmacy selection: 15% suspension of 3500-4000 times the liquid; 10% Divided EC 500-750 times; NPV virus nocturnal insecticide 600-800 times the liquid; 20% Gao Miao EC (nocturnal) 800 -1200 times the liquid; Austrian Green No. 1 EC 800-1000 times; 30% Avi kill single WP 500 times.
So what is the Frame?
The Frame is the smallest unit of the single image in video/animation, which is equivalent to every frame of lens of a film. A frame is a still picture, and successive frames form an animation, such as a TV animation. We usually call the Frame the number of frames that pictures transmitted in 1 second. We can also be regard the Frame as that how many times the graphics processor can refresh per second, which is usually expressed by fps (Frames Per Second), and it can be called the Frame Rate. Each frame is a still image, and the displaying frames in the rapid succession creates an illusion of motion. The high frame rate can achieve smoother and more realistic animation. The more frames per second (fps) there are, the smoother the displayed motion will be.
So what is the Frame Rate?
The Frame Rate, also be called the frame frequency, is expressed in Hertz (Hz) and it is the frequency (rate) of the bitmap images(whose unit is frame) that continuously appear on the display. This term also applies to the films, the video cameras, and the computer graphics and motion capture systems.
Generally speaking, when the Frame Rate is higher than 50 Hz to 90 Hz, most research participants believe that the modulated light (such as a computer monitor) is stable, and the sense of stability of this modulated light is called the flicker fusion threshold( when the modulated light is non-uniform and contains an image, the flicker fusion threshold can be much higher, perhaps hundreds of hertz). As for the image recognition, it has been found that if people need to recognize the specific images in an uninterrupted series of different images, each image should last 13 milliseconds at least. And the persistence of the human vision sometimes may cause a very short single millisecond visual stimulus, and the duration will be from 100 milliseconds to 400 milliseconds. Very short multiple stimuli are sometimes considered as a single stimulus. For example, a 10-millisecond green flash first, then a 10-millisecond red flash followed, under this condition, the they would be perceived as a single yellow flash.
Well, I hope that my introduction about the Network Video Recorder 4K and the Frame Fate could help you know more about this video monitoring field.
Autumn and Winter Cruciferous Vegetables Pest Control
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