In order to prevent the tomato from falling and falling, the more fruit hormones used in production are 2,4-D and anti-fallin. Farmers should pay special attention to the following points during their use:
Use concentration
The concentration of 2,4-D is generally 10ppm-20ppm, the concentration of the use of the anti-fallin is generally 20ppm-40ppm, the lower limit of the concentration is taken at high temperature, and the upper limit of the concentration is taken at low temperature. Before use, the flowering test should be carried out first, and several normal flowers should be smashed first. If the ovary begins to expand after 4-5 days, it indicates that the concentration is suitable; if the ovary begins to expand within 3 days, the concentration is too high; There is no swelling in the ovary, indicating that the concentration is too low.
2. Use time
It is best when the flower is seen when the flower top is yellow and not completely open or the flower is scalloped. It is easy to cause burnt flowers too early, and it will not work until the flowers are lanterns too late. In the sunny afternoon, the flowers are better. In the morning, the scent of the flowers will change due to the condensation on the surface of the plants, causing phytotoxicity.
3. Treatment site
Lightly apply the prepared solution to the flower stalk or peduncle with a brush, or soak the whole inflorescence in the solution. Do not sprinkle the solution on the young leaves or growth points of the plant during the treatment, otherwise the leaves will become strips. Fern leaves, slow growth, especially 2,4-D, the most susceptible to phytotoxicity.
4. Fertilizer supply
The use of hormonal flowers can prevent falling flowers and promote fruit hypertrophy, but there is no fertilizer effect. Therefore, after using hormones, it is necessary to scientifically and reasonably topdress and strengthen management. In addition, after the first ear fruit is used with the fruit hormone, the other ear fruits should be used. Otherwise, the fruit below absorbs a lot of nutrients, and the above-mentioned ear does not receive the necessary nutrients, and the phenomenon of falling flowers and falling fruits will occur.
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For the treatment of diseases of the respiratory system:
Diseases and conditions of the respiratory system fall into two categories: Viruses such as influenza, bacterial pneumonia and the new enterovirus respiratory virus that has been diagnosed in children; and chronic diseases, such as asthma and chronic obstructive pulmonary disease (COPD). According to Dr. Neal Chaisson, who practices pulmonary medicine at the Cleveland Clinic, there is not much that can be done for viral infections but to let them run their course. "Antibiotics are not effective in treating viruses and the best thing to do is just rest," he said.
COPD is the intersection of three related conditions - chronic bronchitis, chronic asthma and emphysema, Chaisson told Live Science. It is a progressive disease that makes it increasingly difficult for sufferers to breath.
Asthma is a chronic inflammation of the lung airways that causes coughing, wheezing, chest tightness or shortness of breath, according to Tonya Winders, president of the Allergy & Asthma Network. These signs and symptoms may be worse when a person is exposed to their triggers, which can include air pollution, tobacco smoke, factory fumes, cleaning solvents, infections, pollens, foods, cold air, exercise, chemicals and medications.
Lung cancer is often associated with smoking, but the disease can affect non-smokers as well. Every year, about 16,000 to 24,000 Americans die of lung cancer, even though they have never smoked, according to the American Cancer Society. Like all cancers, lung cancer is caused by the uncontrolled growth of abnormal cells.
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