Tomato hollow fruit is a physiological disease, and varieties with a small number of ventricles are prone to occur. There are many reasons for the formation of tomato hollow fruit, such as improper time for spraying hormones, insufficient light, insufficient watering at the end of the period, too much fruit left, and insufficient supply of nutrients. In order to avoid the appearance of empty fruit, the tomato varieties with more ventricles should be used for cultivation, and the regulator should be used reasonably. When 2/3 of the flowers of each inflorescence are open, spray the concentration of 15-25ppm of the anti-falling hormone. use.
In addition, in the cultivation, the base fertilizer should also be applied, and the formula fertilization technology should be adopted. The result is timely topdressing and pouring enough water to meet the nutrient demand of the plant. The growth of various tomato varieties should be balanced according to the vegetative growth and reproductive growth of each variety.
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Veterinary drugs can be roughly classified into four categories: â‘ general disease control drugs; â‘¡ infectious disease control drugs; â‘¢ internal and external parasitic disease control drugs; â‘£ (including growth-promoting drugs). Except for biochemical immune products (bacteria, vaccines, serums, antitoxins and toxoids, etc.) for the prevention and treatment of infectious diseases, and special veterinary drugs such as special parasitic drugs for livestock and poultry and growth-promoting drugs, the rest are the same as those for human use, but the dosage , dosage forms and specifications are different. It has long been widely used to control livestock and poultry diseases.
Among veterinary drugs, commonly used are more than 20 kinds such as analgin, amoxicillin, florfenicol, ceftiofur, oxytetracycline, chlortetracycline, bacitracin, salinomycin, monensin, colistin, etc. . 60% of antibiotics are used for chemical treatment; 40% are used for chemical treatment, which not only has the effect of preventing infectious diseases, but also can promote the growth of livestock and poultry and improve the utilization rate of feed.
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