he fluorine-containing phenol series product is toxic and irritating, it should be avoided absorbed into the body through the skin. And not allow to store with strong oxidant, alkali, hydrochloric acid and acid anhydride , Store with flammable liquid or solid,must be away from heat and open flames,it should be stored in a cool dry place. Most of the fluorine-containing phenol products are stable at room temperature and pressure, but avoid contact with the oxide. In the air it is easily oxidized color. Containing Phenol,2-Bromo-4-Methylphenol,2-Chloro-3-Fluorophenol Taizhou Volsen Chemical Co., Ltd. , https://www.volsenchem.com
Manufacture and storage of fluorine-containing phenol series should be carried out in a well ventilated place. Wear appropriate protective equipment and prevent dust from spreading. Wash hands and face thoroughly after handling.
Most of the fluorine-containing phenol series of products can be sublimated. It can cause severe skin burns and eye damage.
So save the fluorine-containing phenol series in sealed containers must be stored in a cool, dark place. It must be stored locked. In the event of a fire extinguishing agent is suitable dry powder, alcohol-resistant foam, water spray, carbon dioxide.
At present, during the planting season for greenhouse vegetables such as tomatoes, cucumbers, eggplants, and peppers, several technical measures have been proposed to address common issues encountered in previous fruit and vegetable production. These strategies aim to improve crop health, yield, and quality.
First, it is essential to clean the greenhouse and perform thorough disinfection. After harvest, all plant residues, dead leaves, and weeds should be promptly removed and taken outside the greenhouse for high-temperature composting or deep burial to minimize pest and disease risks. The greenhouse should then be fumigated using sulfur and a sulfur fumigator. A mixture of 80% dichlorvos and pine sawdust can be used to control insect pests. Each section of the greenhouse should be fumigated with 10 liters of the mixture. After sealing the greenhouse for 24 hours, the air should be released before replanting, ensuring that no residual fumes remain.
Second, applying organic fertilizer is crucial. Farmers are advised to use over 3,000 kilograms of high-quality fine organic fertilizer per acre, or 1,000 kilograms of commercial organic fertilizer (such as puffed chicken manure). This should be applied before tilling the soil and mixed thoroughly. Before planting, a trench should be dug around the planting holes, and 20 kilograms of nitrogen-phosphorus-potassium compound fertilizer should be added per acre. Fertilizer preparation should begin about 15 days before planting to allow partial decomposition.
Third, soil preparation must be meticulous. The soil should be deeply plowed to a depth of approximately 25 centimeters, ensuring a smooth and fine texture. Raised beds should be created at intervals of 1.3 to 1.5 meters, with a ridge width of 70 to 80 centimeters, a ditch width of 60 to 70 centimeters, a surface height of 15 to 20 centimeters, and a length of 6 to 8 meters. The ridges should be covered with silver-gray mulch to help retain moisture and suppress weeds.
Fourth, proper planting timing is critical. Planting too early when the ground is still cold may damage young roots, while planting too late reduces the growing period and affects yield and quality. The ideal time to plant tomatoes and eggplants is when the 10 cm soil temperature stabilizes above 13°C. For cucumbers, pumpkins, and wax gourds, the soil temperature should be above 15°C. In plains, solar greenhouses are typically planted between mid-February and late February, while other greenhouses are best planted between March 20 and 30. If seedlings are grown and the soil is still cool, multiple layers of covering can be used to increase warmth. It's also recommended to choose a sunny afternoon during the "cold-tail warmer" period for planting.
Fifth, planting density varies depending on the crop type. Most crops are planted in large and small rows, with two rows per bed, 80–100 cm apart for large rows, 40–50 cm for small rows, and 30–45 cm between plants. For example, common cucumber varieties like Youyou 30 require about 3,500 plants per mu, while fruit-type cucumbers like Diana need around 2,000. Cherry tomatoes typically require 1,800–2,000 plants, and ordinary tomatoes like Gampen 1 may be planted at 3,000 per mu.
Sixth, planting depth also depends on the crop. Cucumbers and wax gourds should be planted shallowly, with the root neck level with the soil surface. However, eggplants and tomatoes should be planted deeper. After planting, the soil should be watered immediately to ensure good contact between the roots and the soil.
The author is a senior agronomist at the city’s agricultural technology promotion station.