Brown spot occurs at the seedling stage of peanut, and lesions of tan or rust color needles form on the leaves at the initial stage of disease, and gradually expand to form round or irregular lesions of different sizes ranging from 4 to 10 mm in diameter. . The surface of the lesion on the leaf surface is gray, with brown or light brown on the back, yellow halos around, and gray mold on the surface of late lesions. In severe cases, lesions aggregate into large plaques, causing the leaves to fall off. Leaf petioles and stems are oblong, dark brown and slightly sunken.
Drug control: In the early stage of disease, when the diseased leaf rate in the field reaches 10%-15%, spray 25% carbendazim 400 times, or 75% chlorothalonil wettable powder 400-500 times, spray 1 time in 15 days. Spraying 2-3 times can be used, such as spraying the above two kinds of medicines and foliar fertilizers, and adding adhesives, the efficacy will be better.
2022 New Laser Distance Sensor
At the start of 2022, JRT introduce our customers a batch of new series laser distance measurer sensor(S92-20m, S91, BA6A-150m, BA6A-20Hz, M703A-8Hz, U81-10m etc.). Especially S91(RS485 interface and software Rx Tx protocol) and S92(RS232 interface) ip54 enclosure distance sensor model, custoemrs would like to use it in their industrial automation solutions,according to the ip54 waterproof protection level, well protect laser, Wide Voltage 5~32V(Optimize for industrial using), and easy-to-install.
If you are interested in JRT more laser measuring sensors, or you would like buy qty 2 quotation for trial basis, please welcome to contact us.
Kind regards
JRT Team
Chengdu JRT Main Ranging Modules: Industrial Laser Distance Sensors, Laser Rangefinder Sensor , Tof LiDAR Sensors.
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Chengdu JRT Meter Technology Co., Ltd , https://www.infrareddistancesensor.com