First, the onset of symptoms: The typical symptom of wilt is wilt, usually in the field before and after the plants began to appear melon. At the early stage of disease, the diseased plants showed that the leaves gradually drooped from the bottom upwards, appearing to be water-deficient, more evident at noon, and recoverable sooner or later. After a few days, the whole leaf withered and drooped and no longer returned to normal. The base of the diseased stem often has longitudinal fissures. It gradually dries after being stained with water, and some diseased plants overflow the amber colored rubber particles. The stem was cut longitudinally and its vascular bundles were brown. In moist conditions, the surface of the diseased area often produces a white or pink layer of mildew. Second, prevention and control measures Once the blight occurs, it is difficult to control, disease-free should strictly control the introduction of bacteria. Prevention and control of the disease should be based on agricultural control, supplemented by pharmaceutical control. 1. Variety selection Choose suitable disease-resistant and disease-resistant varieties for local cultivation. The varieties with resistance to wilt include: Jinlu No. 1, Jinlu No. 16-21, Xinchun No. 5, and Zhongnong 8, 9, 15, 16, and 19, among others. 2, seed disinfection of the active ingredient is 0.1% of the 60% carbendazim hydrochloride soluble powder plus 0.1% of the Ping-ping plus (surfactant) soaking for 60 minutes, remove and wash after germination. 3. Cultivate strong seedlings and choose disease-free soil or disinfected nutrient matrix (mixed 50% of carbendazim 8g per square meter to treat buckwheat noodles) to raise seedlings to prevent seedling wilt disease. Do not injure the roots when planting and regenerate seedlings quickly. Plant disease resistance. 4. Cultivation management and non-guarante crop rotation, applying fully decomposed organic fertilizer, reducing wounds, improving cultivation and management level, watering to make small water and pouring, avoid flood irrigation, cultivating and weeding, improving soil permeability, and making root system Resilience, enhance disease resistance. 5, grafted disease prevention choice Yunnan black seed melon or the South anvil as 1 rootstock, using grafting or docking method for grafting, daytime temperature control at 28 °C, 15 °C at night, the relative temperature of about 90%, survived about 15 days Afterwards, it turns to normal management. 6, pharmaceutical control (1) Soil Disinfection 50% of carbendazim WP is mixed with 4 kg/mu of fine sand, and then mixed into a planting hole. (2) When the root of cucumber 4-5 leaves is sprayed with the agent, use 3.2% of the methylester solution 300 times or 60% of the methyl sulfide WP 700 times; 3% of the virgin agent 650 times; 30 % of mycophenolate hydrolyzate 800 times solution root irritation, 0.3L-0.5L per well-contained solution; or 12.5% ​​synergistic carbendazim solvent 250 times, 100ml per plant, every 10 days Irrigation once, continuous prevention and treatment 2-3 times. (3) Control of the spread of the applicator The base of the stem was spread with a 1:50-fold dilution of 50% carbendazim during the flowering period of the cucumber, once in 7-10 days, and applied 2-3 times. The effect of control was higher than that of the root irrigation method. The use of carbendazim was stopped 10 days before the harvest. Short range distance sensors from JRT combine highly precise measurement results with quick and reliable response. Short distance sensor module use single-transmit and single-receive measurement technology and can be used to measure a distance or monitor the slow moving objects. For the laser pointer distance measure, also called optical range sensor, can measure legth, width, depth. Laser rangefinder transducer with rxtx has been widely used to industries. Laser Distance Sensor Short Range,Short Range Sensors,Oem Laser Distance Sensor,Distance Sensor Laser Chengdu JRT Meter Technology Co., Ltd , https://www.accuracysensor.com