Sweet potato roll leafworm, alias sweet potato wheat moth, is a Lepidoptera, moth family, mainly damage sweet potato, leeks, morning glory and other convolvulaceae plants. The larvae of sweet potato leaf roll insects infested the leaves after hatching, and the larvae were 4 years old. The action was lively, and they jumped to the ground at the touch of a touch. The 2nd to 3rd instar larvae began to spin leaf curls, feeding on the leaves and leaving the epidermis, leaving only reticular veins in severe cases. Larvae can metastasize more than one leaf each year.
Larvae can also harm young shoots and shoots. After the larvae are matured, the larvae are defoliated in the leaf or earth seams. From June to September, it was the period of its occurrence. Humidity is conducive to sweet potato moths occurring at high temperatures. In severe cases, sweet potato leaves are heavily entwined, presenting a "fire phenomenon" and seriously affecting sweet potato yield. The Greek peasant friends have paid enough attention to the prevention and control work to ensure the safety and security of sweet potatoes.
How sweet potato leaf roll insecticides prevent and control sweet potato leaf roll insects
1. Chemical control. In the early stage of sweet larvae of sweetpotato moth, pesticides can be sprayed with 48% of 1500-fold emulsion of Le Siben EC or 1000 times of 20% butylthiocarbabe EC, and 40-50 kg of spray liquid can be sprayed. The drug time is appropriate at 4 to 5 pm.
2. Manually kill. When the larvae roll leaves are initially damaged, the larvae in the new leaf roll can be pinched in time or the new roll leaves can be taken out of the field for centralized treatment.
3. Agricultural control. Timely clean up the leaves of field stubbles, remove weeds from fields and fields, and eliminate the source of overwintering insects.
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.
Multi 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