In summer tomato cultivation, seedlings are generally started in late May, transplanted in the field in mid-June, and fruit is listed in the middle and late August. Due to the high temperature and rainy season of tomato growth in summer, physiological diseases are common diseases, which affect the normal growth and development of tomato and can aggravate the occurrence of tomato infective diseases. Through investigation and analysis, the main causes of physiological diseases are: (1) The amount of fertilizer used is too large, the concentration of soil solution is high, coupled with the high temperature and drought on the surface, causing poor growth of roots, and difficulty in transforming nitrogen forms. The presence of ammonium salts makes the middle and lower leaves thicker, curled, and poorly grown. Even dry. (2) Excessive nitrogen and phosphorus lead to the relative deficiency of trace elements such as potassium, calcium and boron, the antagonism between elements is obvious, the effectiveness is poor, and it can not be absorbed and utilized, making it difficult to synthesize, operate and distribute nutrients, and form the disease of rot and disease. Control method: (1) Adhere to the principle of base fertilizer and supplemented by topdressing, and appropriately increase the amount of base fertilizer applied. Through field investigation, the amount of base fertilizer application can account for 75% to 80% of the total fertilization amount in the whole growth period, which has a good effect on enhancing plant growth and improving resistance. (2) Formulating fertilization, increasing organic fertilizer, balancing application of nitrogen, phosphorus and potassium fertilizers, and applying trace element fertilizers. It is strictly forbidden to use excessive nitrogen fertilizer, and apply humic acid fertilizer with improved soil conditioning and buffering capacity to increase soil. Permeability promotes root development. (3) Watering at the right time. The growth period of summer tomato is in the high temperature and rainy season. It is necessary to pay attention to the balanced supply of water during the fruiting period, timely watering and draining, and it is strictly forbidden to accumulate water or drought in the field for a long time to ensure a balanced supply of water. (4) Supplement trace elements. When the tomato is deficient in calcium, foliar spray can be applied with 1% superphosphate leaching solution. In the absence of boron, the borax aqueous solution having a concentration of 0.2% to 0.5% may be sprayed on the surface. (5) Controlling aphids, whitefly, leafhoppers, etc., to improve the disease resistance of plants. It can be sprayed with 3% acetamiprid 750 times solution or 10% imidacloprid WP 1500 times solution. We are a professional Chinese supplier of Sports Health Material; we supply various products of Sports Nutrition ; and we can providing product images and basic parameters with each Muscle Builder Material,Arthrosis Protect Material and Protein Powder, such as Conjugated Linoleic Acid,Cyanotis Arachnoidea Extract,Chlorella Protein Powder,Spirulina Protein Powder etc . Look forward to your cooperation! Sports Nutrition,Conjugated Linoleic Acid,Cyanotis Arachnoidea Extract,Chlorella Protein Powder,Spirulina Protein Powder Xi'an Quanao Biotech Co., Ltd. , https://www.quanaobiotech.com
Summer planting tomato Wang Yi anti-physiological disease