The products of early autumn cabbage are listed before and after the National Day, and can obtain better economic benefits. However, its seedling period happens to be in the late summer and early autumn. Higher temperatures often affect and inhibit the growth of Chinese cabbage seedlings, and often lead to serious viral diseases leading to reduced production or even no harvest. The techniques for seedling production in early autumn cabbage are summarized as follows:
Choose the right variety. Since the whole growth period of Chinese cabbage cultivation is under high temperature and strong light conditions, it is necessary to use early-maturing Chinese cabbage varieties that are resistant to heat and glare and have strong resistance to viral diseases, downy mildew and soft rot. Xia Kang 50, Xia Kang 55, Spring and Autumn 54 , heat anti-white 45 and so on.
Determine the appropriate sowing date. Due to the different emergence time of new species and seedlings, the new seeds should be planted at around 5 pm, and the seeds should be planted at 8-9 in the morning.
Choose a nursery plot. In order to prevent autumn rain, the seedbed should be located in a well-drained plot.
Carry out rooting and nursery. It is advisable to use nutrient mash for rooting and nursery to facilitate centralized management and cultivation of strong seedlings.
Strengthen water management. The implementation of the watering system of “three waters and seedlings, five waters and fixed trees†can prevent drought and cool down agricultural knowledge and reduce the occurrence of viral diseases.
Timely shade and cool down. During the nursery period, according to the weather, it is necessary to spray water and cool several times in the seedbed, use sunshade net shading, shelter from rain and wash.
Integrated pest management. The main pests and diseases of Chinese cabbage seedlings include jumping armor, cabbage caterpillar, rapeseed meal, aphid, soft rot, black rot, angular spot disease, etc. The application of related pesticides is carried out by soil disinfection, seed dressing and spraying to prevent and kill.
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Virus Specimen Collection Tube
Inspection principle:
It can perform protein denaturation on fresh clinical virus samples to inactivate the virus, prevent secondary transmission of infection, and ensure the safety of transportation and testing personnel.
♣.Structural composition: Combination of cotton swab and transport medium (VTM).
♣. Product requirements:
The product should be airtight, avoid high temperature, avoid direct sunlight storage. It should be used in a clean, hygienic, pollution-free, and temperature-friendly environment.
♣, Storage conditions and validity period:
â‘ , the product should be stored in a clean, dry and ventilated environment,
②, the temperature is 5℃-35℃;
â‘¢, relative humidity <85%RH;
â‘£, product shelf life: 12 months.
♣. How to use
â‘ Before sampling, mark relevant information on the label of the sampling tube.
â‘¡. Sampling with the corresponding cotton swabs.
â‘¢ After the collection is completed, quickly put the cotton swab into the collection tube, break the part higher than the sampling tube, and tighten the tube cover.
â‘£. For the specific sampling method, please refer to the following:
a) Nasal swab Gently insert the sampling head into the nasal cavity, stop for a while and then slowly rotate to exit, immerse the collected specimen in the Xiangxiang solution, break the excess part and discard it, and tighten the sampling tube cover.
b) Pharyngeal swab: Wipe bilateral pharyngeal tonsils and posterior pharyngeal wall with the sampling head, immerse the collected specimen in the sampling solution, break off the excess part and discard it, and tighten the cap of the sampling tube.
c), Mycoplasma Chlamydia, Ureaplasma specimen collection
Male: Insert the sampling head into the urethra about 2cm and rotate, stay for a while and then exit, and immerse the collected specimen in the sampling solution.
Female: Wipe the mucus of the cervical orifice, insert the sampling tip into the cervical canal for 1-2 cm for sampling, immerse the collected specimen in the sampling solution, break off the excess part and discard it, and tighten the cap of the sampling tube.
♣. Precautions
1. After the virus is collected, the disposable sampling swab should be completely inserted into the preservation solution, so that the virus can be retained to the greatest extent possible.
â‘¡ The collected specimens must be sent for inspection in time.
â‘¢. It is forbidden to use products with damaged packaging and expired validity period to prevent pollution.
This single-use Virus Sampling Tube is used for in vitro diagnosis. It cannot be used for human or animal oral or external use. If swallowed, it may cause serious events; it is irritating to eyes and skin. If it is not splashed into the eyes, rinse with water.
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Jilin Sinoscience Technology Co. LTD , https://www.contoryinstruments.com