Tomato disease prevention and control technology
Prevention of early blight: 1. Remove diseased leaves and timely ventilation in the shed. 2, pharmaceutical control. The spraying begins at the beginning of the disease and it takes about 7 days. It can be used: (1) 5% chlorothalonil dust 1 kg/mu dusting. (2) 45% chlorothalonil aerosol, 250 grams per acre, divided into several places, and ignited the closed shed overnight in the evening. (3) Spray control: Use 70% mancozeb 500 times, with a safety interval of 15 days. Or use 75% chlorothalonil wettable powder 600 times, or 80% will be profit 600-800 times spray. Late blight prevention and treatment: 1, first of all to control the temperature and humidity, as much as possible to reduce the temperature and humidity within the shed, during the day in the control of 26-30 °C, night control of 20-24 °C, shade film can be covered on the film to reduce the greenhouse temperature. Timely ventilation and humidity to maintain the relative humidity of 60-70%. After the onset, diseased leaves and diseased fruits were removed. 2. Chemical control: The beginning of the onset of drug application. Optional: (1) 5% chlorothalonil dust 1 kg/mu dusting, spray once in 7 days. (3) 72% Kelu WP 400-600 times, or 72.2% Precair 600-800 times, or 40% EB-Zn WP 300 times, or 64% Sift 400-600 Double spray control. Chengdu JRT is a world leader in the design and manufacture of highly accurate, precise and digital and analogue laser measurement sensors, including serial laser distance transducer,usb laser distance module,distance module ttl laser sensor rs232/RS485/Bluetooth. These Laser Distance Sensor products are widely used in many smart industrial precise measurement soluitons: robot,crane,etc. This laser distance measure technology, combined with the high speed, 1mm high resolution and accurate measurement, specially the micro laser sensor(41*17*7mm),will confidently and accurately solve your precision measurement problem. Laser Distance Measurement,Laser Measurement Sensors,distance measurement sensors,Smart Measure Sensor Chengdu JRT Meter Technology Co., Ltd , http://www.rangingsensor.com