Huijie Steel Pipe provide variety of Profile Steel Tubes for automotive parts,,engineering machinery,agricultural
machinery,furniture,construction materials,Supplied as DIN,ASTM,ASME,EN,BS,JIS,GOST,GB etc standard
including the Seamless special pipes/SMLS profile steel pipes/ERW profile steel pipes,
We can offer the profile steel tubes:
Seamless/ERW Rectangle Steel Tubes,
Seamless/ERW Omega Steel Pipes,
Seamless/ERW Hexagonal Steel Tube
Outside Hexagonal and Inside Round Steel Tube,
Outside Round and Inside Hexagonal Steel Tube,
Seamless/ERW elliptical steel tube,
Seamless/ERW Oval Steel Tube,
The special profile steel tubing can be produced by customer drawing.
Steel Tubes,Square Seamless Tubes,Seamless Rectangle Tubes,Seamless Mechanical Tubing Ningbo Huijie Steel Pipe Manufacturing Co.,Ltd , https://www.hjbearingtube.com
The optimum air temperature for spore capture by quantitative airborne spore traps is 20-25°C, and the daily average temperature is lower than 19°C or higher than 26°C, and the trapping volume is significantly reduced. Rainfall can promote the settlement of spores. Therefore, there is little catch on rainy days and the amount of sunny catches after rain increases sharply. The breeze is conducive to the spread of powdery mildew, and the amount of spores trapped by quantitative airborne spore traps increases. However, the spores of wind speeds below 0.2 m/s and above 3.0 m/s are significantly reduced.
The mastery of the occurrence and quantity dynamics of aerial spores during this period through quantitative airflow spore traps is a condition and basis for predicting the final condition and determining the first application period. Spores at the end of the winter and early spring when the gum trees began to draw leaves the rubber tree powdery mildew spores, with the gum tree leaf extraction rate increased simultaneously. Subsequently, as the temperature increased, the young leaves became old, the ability to produce spores decreased, and the in-air spores gradually decreased, so that the quantitative quantity of quantitative airborne spore traps was also affected.
Seamless/ERW Rectangle Steel Pipes,
Seamless/ERW Square Steel Tubes,
Seamless/ERW Square Steel Pipes,
Seamless/ERW Omega Steel Tube,
Spores are generally transmitted through the wind in the air. For quantitative studies on the capture of spores, quantitative airborne spore traps are generally recommended. Their use can provide accurate research samples of spores in the air. In general, the annual number of in-flight spores can be divided into four different stages. The number of spores in the winter foreseen period has little relationship with the prevalence of powdery mildew, and the rapid increase in the number of spores in the epidemic phase is a manifestation of the disease epidemic through quantitative wind spore capture experiments. Only the epidemic initiation period determines the prevalence of powdery mildew in the year. crucial moment.