First, there are three major diseases of Chinese cabbage, namely: soft rot, virus disease, downy mildew, its spread and pests are inextricably linked, to prevent the three major diseases must first pest control. Second, soft rot disease caused by bacteria invade. The control of cabbage caterpillars, flea beetles and underground pests, and the reduction of pest wounds can effectively reduce the incidence of soft rot of Chinese cabbage. 80% of dichlorvos EC and 80 times of 13T can be applied to cabbage caterpillars and flea beetle. 50% phoxim EC 1000 times, rooting poison. 3. Viral diseases are caused by virus infection. Aphids are the main vectors for transmitting viruses. To prevent virus diseases, it is necessary to prevent locusts from harming first. The seedling stage is the period during which locusts move into danger. It is easy to spread virus diseases. It must be prevented and treated as soon as possible after emergence. , with 40% Dimethoate EC, vinegar and water, in accordance with the ratio of 1:2:2000 sprayed with liquid, but also can choose to use a big hero, once again net plus vinegar diluted with water to spray, pesticide solution plus vinegar, Not only can increase the effect of killing locusts, but also prevent and suppress the occurrence of viral diseases. 4. Downy mildew is a fungal disease. Although its occurrence is not directly related to pests, the early stage of Chinese cabbage infection often causes severe downy mildew in the middle and late stages. Viral disease is mainly transmitted by roundworms to kill aphids. It also indirectly protects Chinese cabbage from downy mildew. Leading Laser Measure Module Factory in China
Product Specifications:
Accuracy
±1
mm (0.04 inch)
Measuring
Unit
meter/inch/feet
Measuring
Range (without Reflection)
0.03-150m
Measuring
Time
0.1~3
seconds
Laser
Class
Class
II
Laser
Type
635nm,
<1mW
Size
45*25*12mm
(±1 mm)
Weight
About
10g
Voltage
DC2.0~3.3V
Electrical
Level
TTL/CMOS
Frequency
10Hz
Operating
Temperature
0-40 ℃ (32-104 ℉ )
Storage
Temperature
-25~60 ℃ (-13~140 ℉)
Range Sensor,Laser Distance Module,Distance Sensor,Laser Measure Sensor Chengdu JRT Meter Technology Co., Ltd , https://www.infrareddistancesensor.com
The World's First single transmitting single receiving design laser module, which has a big help to reduce producing cost and power consumption of the laser distance sensor.
This Laser distance sensor has high Accuracy up to ±1 mm, working as phase measure, which support RS232/RS422/RS485/Arduino to TTL communication.
This laser distance module is widely used in the Laser Distance Meter industry, also a very good choice for the Industrial applications. Most of measuring tools manufactures is purchasing from us in China.