Virus Specimen Collection Tube Inspection principle: Virus Sampling Tube,Virus Specimen Collection Tube,Viral Transport Tube,Saliva Virus Sampling Kit Jilin Sinoscience Technology Co. LTD , https://www.jlgkscience.com
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.
Warm and high humidity to prevent lettuce Sclerotinia
Sclerotinia is a widespread disease that affects stem lettuce and poses a significant threat to crop health. It can severely impact both yield and quality, making it essential to understand its symptoms, occurrence patterns, and effective control measures.
Symptoms of the disease typically begin at the base of the stem, where brown, water-soaked lesions appear. Over time, these lesions spread upward along the stem and downward toward the roots, turning dark brown. As the infection progresses, the affected tissue becomes soft and begins to rot. In severe cases, the entire plant wilts and dies. Under wet conditions, white, cotton-like fungal hyphae may develop on the surface, eventually forming grayish-brown to black structures known as sclerotia, which are the characteristic survival bodies of the pathogen.
The disease is caused by the fungus *Sclerotinia sclerotiorum*, which has a wide host range. Besides lettuce, it can infect various crops such as cruciferous vegetables, solanaceous plants, legumes, melons, carrots, and more. The sclerotia germinate under favorable temperature and humidity conditions in spring, producing spores that are dispersed through wind, rain, or via wounds and senescent tissues of infected plants. The hyphae then invade the host, secreting enzymes that break down plant cells, leading to soft rot. The mycelium can also spread to nearby plants through direct contact. The optimal conditions for disease development are an average temperature around 20°C and relative humidity above 85%. Continuous cropping, low-lying fields, overcrowded planting, and excessive nitrogen fertilizer application can all contribute to increased disease severity.
To manage Sclerotinia effectively, several preventive strategies should be implemented. First, selecting resistant lettuce varieties such as red lettuce, hanging red silk, or red leaf is recommended. Seeds should be sourced from disease-free stocks, and any contaminated seeds containing sclerotia can be removed using a sieve or by soaking them in a 10% saltwater solution before sowing.
Field management is equally important. Crop rotation with non-host plants, soil disinfection, and proper field sanitation help reduce the inoculum level. Before planting, the soil should be well-prepared, leveled, and free of debris to ensure proper drainage and irrigation. Regular weeding, removal of diseased, dead, or old leaves, and maintaining good air circulation can also prevent disease spread. Infected plants should be promptly removed and treated with lime to neutralize the pathogen. Balanced fertilization is crucial—avoiding overuse of nitrogen while ensuring adequate phosphorus and potassium levels helps strengthen plant resistance.
Chemical control should be applied early when the first signs of infection are observed. Recommended fungicides include 50% carbendazim WP diluted at 600–800 times per mu (666.7 m²), 70% thiophanate-methyl WP at 800–1000 times, 50% benomyl WP at 1000–1500 times, 50% iprodione WP at 1500 times, or 40% mancozeb wettable powder at 1000 times. A spray volume of 50–60 kg per mu is typically used. Applications should be repeated every 7–10 days for 2–3 times to ensure effective control. Always follow the manufacturer’s instructions and local agricultural guidelines for safe and effective use.