Soft rot is one of the main diseases of sweet potato during its storage period. It is widely distributed and occurs in various sweet potato production areas throughout the country. First, the symptoms of sweet potato soft rot commonly known as water, is the harvest and storage of important diseases. The potato chips became infected. The white molds grew on the surface of the tuber, and then turned dark or black. The diseased tissue turned into a light brown water immersion, and a large number of gray-black mycelium and sporangia grew on the surface of the diseased part. Black moldy contaminated The surrounding diseased potatoes form a large piece of moldy hair, and the condition spreads rapidly. The entire tuber is soft and rotted for about 2-3 days, giving off bad smell. Once the disease has spread rapidly, it often causes the whole kiln to rot and causes serious damage. Therefore, we must strengthen prevention and ensure the safe storage period of sweet potatoes. Second, preventive measures In order to avoid the occurrence of soft rot, farmers can take the following measures: timely harvest, avoid wounds. Before entering the pits, select healthy potatoes and dry them in a timely manner. Clean up and fumigate the potato pit before entering the pit. Strictly "three phases" management. In the early period: Within 30 days after entering the cellar, due to the vigorous vitality of the tubers and the high respiratory intensity, a large amount of heat, water vapor and carbon dioxide are released to form a high temperature and high humidity environment. Therefore, the main work during this period is ventilation and cooling. Wet and wet, the temperature is controlled below 15°C, and the relative humidity is controlled at 90%-95%. Medium term: from December to the cold period in February of the following year, it is the coldest season of the year. Attention should be paid to insulation and antifreeze, so that the pit temperature should not be lower than 10°C, and it is best to control at 12-14°C. Later period: After March, the outside temperature gradually rises. Check the cellar temperature frequently and keep it at 10-14°C. Very high sample collection and release volumes.Greatly improved the accuracy of the inspection . Patented polymer synthetics handle 4.The hidden danger of nasopharyngeal swab rupture is completely solved.iCleano swab is ideal for collecting large amount of samples and rapid elution of thespecimens. It instantly release the specimen into the transport medium, which is welladopted in the field of molecular genetics, forensics, clinical laboratories sectors etc. Sampling Swab,Sterile swab of disposable virus sampling tubes,Nasopharyngeal swab sample detection collection,Nasopharyngeal swab Jiangsu iiLO Biotechnology Co., Ltd. , https://www.sjiilobiotech.com