Question: The readers of Yanfei Township called and said that the silvery white streaks appeared on the back of the corn leaves he planted, and then the back of the leaves appeared like a layer of silver powder. Finally, the leaves were deformed and dried up and died. Ask what is this disease, how to prevent it?
Yan Jindong A: According to this reader, this is the hazard of corn and yellow horses. Corn stalks are the main pests in the corn seedling stage. Shandong, Beijing, Hebei and other places are harmful. Adults use a sucking mouthpart to scrape the epidermis of the corn leaf, insert the tissue with the mouthparts to absorb the juice, and the intermittent silvery white streaks appear on the back of the damaged leaves. The front part of the leaf has a yellow streak on the front part. Apply a layer of silver powder, the leaves are deformed, cracked, yellowed and dried, and died. Damage to the heart leaf often causes the heart to bend and deform. Huang Duo Hu Ma occurred on the corn for 2 generations, and at the end of May and early June, it harmed spring corn and interplanted corn. In the second generation from late June to early July, adult peaks appeared, mainly affecting interplanted corn and summer maize.
The yellow-streaked horses are hazard on the surface of the stretched leaves. The hazard period is mainly concentrated on the upper 2 to 6 leaves of the corn, and rarely shifts to the newly stretched leaves. The yield is generally reduced by 5% to 15%, and the weight is reduced by 35%. the above. From late May to early June, the climate drought occurred in a large amount, and the damage was heavy. On the contrary, it was light. The early sowing corn was more serious than the late sowing corn.
Control method:
1. Agricultural management: and time seedlings, seedlings, and the removal of the victim seedlings, centralized treatment. Strengthen field management such as fertilization to promote corn growth, resulting in an environment that is not conducive to the occurrence of corn and yellow thrips.
2. Chemical control; in the early stage of pests, use 48% chlorpyrifos 1000 times or 10% imidacloprid wettable powder 4000 ~ 5000 times or 70% imidacloprid wettable powder 4000 + fluflurin 1000 times or 5% pulp to kill 500 times or 40.7% chlorpyrifos (Lesburn) emulsifiable concentrate 1000 or 10% chlorfenapyr (depletion) suspension agent 2000 times or 5% cypermethrin 20 ml or 25% thiamethoxam WP 6 g and other drugs. Due to the large-scale use of chemical pesticides in the past few years, it is recommended that the majority of farmers' friends should use some chemical additives to prevent the use of chemical pesticides, which can achieve twice the result with half the effort.
Disclaimer: Some articles on this website are transferred from the Internet. If legal rights of third parties are involved, please inform this website. phone
NVR Kit China's domestic level
China Telecom's Global Eye and the former China Netcom have developed remote video monitoring in conditional households. For example, the wide view video monitoring business has been launched in China Netcom's Shanxi, Shandong, Jilin, Zhejiang, Henan and other provincial companies in the early stage, and has been widely welcomed by customers. The wide view business has developed rapidly. In the first half of this year, only Hubei Netcom's "wide view - God's Eye" business has developed more than 500 households. With the rapid development of family information technology, users' demand for family security is becoming stronger and stronger, and the broad horizon will maintain rapid development. China Mobile is also developing mobile MMS monitoring represented by "Handyantong", and 3G video monitoring is also being tested and commercially tested. It is difficult to develop and promote home video surveillance because of the huge data and signal flow relying on the network and the need to deploy home gateways and cameras.
Video monitoring is mainly used in the communities closely connected with families in the industry field, but it is still less used for home monitoring. Under the guidance of the policy of safe cities and safe families, the domestic family monitoring will begin to rise with the continuous improvement of family network environment, the improvement of users' consumption ability, the growth of security awareness, and the increase of independent living families. The integrated video monitoring that integrates limited, wireless access and linkage alarm will become a development trend. Full service operation has arrived. Operators will certainly provide users with wired and wireless diversified technical monitoring means. Through business integration, they will bring users endless monitoring services. Monitoring realizes the discovery and prevention of family safety, and also reflects family care. In addition, efforts should be made to solve the problem of security. Therefore, family monitoring needs to gradually increase some new functions and applications such as linkage alarm and security services, such as emergency help, interaction with public security, medical care, housekeeping, and calling.
Tuya Nvr Wireless 4ch Cctv Camera System Kit,Outdoor Ir Night Vision Security Cctv System,Cctv Network Wifi Camera,1080 P Hd Computer Webcam,outdoor surveillance dome camera
Tuya Nvr Wireless 4ch Cctv Camera System Kit,Outdoor Ir Night Vision Security Cctv System,Cctv Network Wifi Camera,1080 P Hd Computer Webcam,outdoor surveillance dome camera
Shenzhen Fuvision Electronics Co., Ltd. , https://www.outdoorsolarcameras.com