How do yam nematode and melanosis control?
Answer: The nematode that damages the yam is a short-line nematode. The best period of prevention and control should be when the underground tuber is just beginning to form. Use 1000 times 0.5% veratrine solution or 1000 times 2.8% avermectin solution to soak the root soil. 15-20 days, once the leaching, 3-5 times in a row, each 2-3 kg per plant, evenly poured in the soil around the roots of yam plants, water completely into the soil is not appropriate to flow. In addition, during the expansion of yam underground tuber, add 5% avermectin granules or 5% chlorpyrifos granules, 5% veratrine granules, 15-20 g per plant per time, and cover the soil. . The pathogens of yam dermatosis are overwintering in the soil and on the seeds. Fertilizers, soil, and seeds are the primary sources of infection. The pathogens are spread by rain, and continuous cropping and poor drainage can aggravate the disease. To prevent and treat yam dermatosis, first we must pay attention to crop rotation and seed potato disinfection. Before planting, we must soak the seed potatoes with a solution of 800 times carbendazim for 15-20 minutes, then collect and drain the water and plant it. During the tuber swelling of yam underground, pay attention to medication, generally every 15-20 days, the root leaching once 800 times Bacillus subtilis solution or 600 times 50% solution of pentachloronitrobenzene, 800 times 80% carbendazim solution, 600 times 80% aqueous solution of sodium propionate, 1000 times of 46.1% aqueous solution of copper hydroxide, successively 2-3 times, each time the number of 1-1.5 kilograms per plant is poured, evenly pour in the soil around the roots of the yam plants, so that water does not enter the soil completely. Outflow is appropriate.
Video door-phone (also known as video door entry or video intercom) is a stand-alone intercom system used to manage calls made at the entrance to a building (residential complex, detached family home, workplace, etc.) with access controlled by audiovisual communication between the inside and outside. The main feature of video door entry is that it enables the person indoors to identify the visitor and, if (and only if) they wish, engage in conversation and/or open the door to allow access to the person calling.
The following product is the best-selling and most cost-effective video door phone in our factory,
It adopts a 4.3-inch high-definition screen and an aluminum alloy body, and is equipped with led light. It has night vision function and can clearly monitor the outdoor environment and make video calls with visitors even in the dark; physical button operation, classic design, no Easily leave fingerprints and keep your device clean and tidy. It can be used in multi-apartment systems.
The product parameters of 888QZJ4A are for your reference:
1. 4.3 inch 720 HD display TCP/IP Intercom system
2. Calling, intercom, unlocking, monitoring
3. High quality aluminium alloy frosted panel + physical buttons
4. Digital camera, stable and clear image shooting
5. Night vision and bright light compensation function
6. Full duplex voice intercom, comparable to ordinary telephone intercom
7. Elevator linkage function, connect the security system
8. LINUX system platform architecture, system simplification and stability
9. LPDDR3 1 GB memory, standard EMMC 8 GB storage expandable
10. RJ45 standard ethernet interface all-digital design
11. Low power consumption technology solution, saving energy and long life span
12. Dimension:400*140*51(mm)
13. Install method : Wall/flush install (390*130*46 mm)
14. Image/video advertising playback (advertising can be customized)
15. Door opening:IC/ID card/ password/call the Indoor Monitor or center management machine unlock
We are a factory specializing in the production, manufacture and research and development of video door phones for 11 years. We are located in the beautiful coastal city - Zhuhai. We have our own R&D team, we can provide professional products and services. We have different systems of video door phone for different customers and markets, for example, IP video door phone, 2-wire Audio door phone, 4-wire video door phone and wireless doorbell, if you are interested, please feel free to contact me, I can send our catalog to your email.
Video Door Phone,Video Door Phone Intercom System,Video Phone Doorbell,Video Door Calling System Zhuhai Mingke Electronics Technology Co., Ltd , https://www.zhmkdz-electronics.com