The reader asks: The upper leaves of the peanuts are yellowed, the veins are green, the severe veins are yellow, and the whole leaves are yellowed and white. What is the disease? How to prevent it?
According to the description, it can be judged as iron deficiency, which belongs to the initial or medium term. In severe cases, brown spots and tissue necrosis will appear on the leaves. If the timely and effective prevention and treatment is not obtained, the plants will have premature aging or even death. Generally, alkaline soils with high pH values ​​have more iron deficiency.
Control methods: 1. Spray method. The iron fertilizer currently applied can be divided into two types: inorganic iron fertilizer and chelated iron fertilizer. The inorganic iron fertilizer mainly includes ferrous sulfate and ammonium ferrous sulfate, and the method of foliar spraying is adopted, and the concentration is 0.2% to 0.5%. However, due to the small mobility of iron in plants and the easy oxidation of foliar spray, it is best to use chelated iron fertilizer. Mainly FeEDTA (iron diamine tetraacetate), FeDTPA (iron diethylene triammonium pentaacetic acid), FeEDDHA (ethylene diamine o-dihydroxyacetate), ammonium ferric citrate, urea iron, etc., the effect is better than inorganic iron fertilizer . In addition, if the foliar application of iron fertilizer can be combined with the addition of an appropriate amount of urea, the correction effect can be improved. 2. Spread the law. The acid organic fertilizer such as distiller's grains and vinegar grains may be mixed with inorganic fertilizers such as ferrous sulfate and sulfur powder, and the application may be carried out in the peanut field. 3. Casting. It can be watered with 150~200 times liquid vinegar, once every 10~15 days.
Disclaimer: Some articles on this website are transferred from the Internet. If legal rights of third parties are involved, please inform this website. phone
What is Mini Camera
Micro mini camera is a product of modern high-tech, also known as micro monitor. It has the characteristics of small size, powerful function and good concealment.
Micro cameras are widely used in aviation, commerce, media, enterprises, institutions, families and other industries. The appearance of micro cameras has brought convenience to people's lives. At the same time, some phenomena related to corporate secrets and personal privacy have also emerged.
In 1991, the world's first camera (called CoffeeCam) first appeared in the Trojan room coffee pot at the University of Cambridge, UK.
The oldest camera, FogCam of San Francisco State University, has been used since 1994
In 1996, AXIS Communications published the first IP Camera using Internet architecture as the basis for signal transmission.
In 1999, AXIS Communications published IP Camera based on Linux system.
Wireless camera
Wireless equipment is used stably in domestic wireless environment. The micro wireless surveillance camera has the characteristics of high stability, high speed, long distance and multi-point testing. It can play a huge role in the fields of environment, energy, construction, transportation, medical treatment, industrial machine condition monitoring, etc., especially when the cabling is complex, the cabling cost is high, the long-distance and large-scale transmission of data and the mobility demand is high.
Hidden Spy Mini Camera,hidden cameras,camera, WiFi camera,WiFi network,Hidden Spy A9 camera we offered that you can trust. Welcome to do business with us.
Hidden Spy Mini Camera,hidden cameras,camera mini hidden wifi, WiFi camera 1080P hidden,WiFi network,Hidden Spy A9 camera
Shenzhen Fuvision Electronics Co., Ltd. , https://www.outdoorsolarcameras.com