Both the seedling stage and the adult stage can be infected, mainly affecting leaves, stems, flowers and fruits. In the early stage of the diseased spot on the leaf, it is a water-stained brown spot. It is rounded when enlarged. It has a concentric pattern and turns black when wet. The stem has a brown oval-shaped depression at the node. The petiole is damaged and produces an elliptical wheel pattern. Spot, dark brown or black, generally do not enclose the stem; fruit occurs mostly in the pedicle, forming brown or black plaque, with a ring pattern, easy to cause fruit drop.
Second, prevention and treatment methods
1. Strengthen management Seed disinfection before sowing, soaking in warm water at 50 ° C - 55 ° C for 15-20 minutes. Reasonable close planting, the implementation of more than three years of rotation. Strengthen ventilation, cool down, and drain moisture in the temperature room to avoid high humidity environment.
2. Chemical control for continuous drug control during the growth period, can be sprayed with 58% Jia boxling, or mancozeb 500 times solution, 64% antivirus 矾 400 times solution, 57% chlorothalonil WP 600 times solution, 50 % of the seawater is 1000 times - 1500 times liquid, used in the early stage of the disease, once every 7 days, continuous spraying 3-4 times.
The COVID-19 Antigen Saliva Test kit is a lateral flow immunoassay intended for the preliminary screening and qualitative detection of nucleocapsid protein antigen from severe acuterespiratorysyndrome coronavirus SARS-CoV-2which causesthe Coronavirusdisease(COVID-19),in direct saliva sample from individuals suspected of coVD-19 by their healthcare provider within the first seven days of symptom onset.The COVID-19 Antigen Saliva Test kit is for professional use only and is intended to be used as an aid in the diagnosis of SARS CoV-2 infection.
SARS-CoV-2is anenvelopedsingle-stranded RNAvirus ofthe Baenus COVD-19 is an acute respiratory infectious disease. People are generally susceptible.Currently. the patients infected bytheSARS-CoV2are the main source ofinfection:asvmptomatic infected peope car also be an infectious source Based on thecurrentepidemiologica investigation, the incubation period is 1to 14 daysmostly 3to 7 days The main manifestations include feverfatigue and drycough.Nasa congestion, runny nosesore throatmyalgia and diarhea are found in a few cases.
Results are for the identification of SARS-CoV-2 nuceocapsid protein antigen. The SARS-CoV-2 antigen is generally detectable in upper respiratory specimens during the acute phase ofinfectionPositive results indicate the presence of SARS-CoV-2viralantigenshowever cinicai corelation with patient history and other diaanostic information is key to determine status of infection.Positive results don't preclude bacterialinfection or co-infection with other yiruses.eaatveresuts To patients with symptom onset for more than seven days should be treated as presumptive and confirmation with a molecular assayand patient management may be performed according to local regulations as needed.
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