Cultivation techniques of Black Tomato

Black tomato is one of the tomato varieties, which gets its name because of its special appearance color and black appearance. Black tomato is a foreign variety, at present, the scope of cultivation in our country is not extensive, but because it contains a lot of nutrients that are beneficial to the human body, so our country is going to start planting it on a large scale.

Cultivation techniques of Black Tomato

1. Variety selection: varieties with good quality, yield, disease resistance and stress resistance should be selected, such as Heifei 20, Diniz, Black Rose and so on.

2. Raising seedlings: black tomato seedlings can be raised completely according to ordinary tomatoes, and it is best to use special vegetable seedling substrate or to prepare by ourselves; the temperature of emergence should be controlled at 25-28 ℃ in daytime and 18 ℃ at night, and the temperature should be appropriately reduced by 3-5 ℃ after emergence.

3. Planting methods: like ordinary tomatoes, we should pay attention to the soil preparation, fertilization, hanging vines and forking after planting. In daily management, black tomatoes have strict requirements for soil moisture, especially in the peak period of fruit. To keep the soil moist, remember to dry and wet, otherwise it is easy to crack the fruit.

Field Management of Black Tomato

1. Pruning and branching: black tomato growing in the open field leaves the main stem, leaving only 1 Mel and 2 lateral branches under the first inflorescence. Pay attention to avoid pruning before rain, when it rains or when the dew is not dry, to prevent disease. In the later stage of growth, it is necessary to remove the lower old leaves, diseased leaves and diseased fruits to facilitate ventilation and light transmission and reduce the harm of diseases and insect pests.

2. Topdressing irrigation: when entering the fruit setting stage, the plant needs enough nutrients and water, so it should be combined with irrigation to apply thin fertilizer frequently to meet the needs of rapid growth and development of black tomato plants and fruits.

3. Protecting flowers and fruits: vibrating pollination of black tomato at flowering stage and using Zuoguoling, irrigation should be controlled and foliar fertilizer should be sprayed when the concentration of 10mg/kg is controlled at flowering stage. During the fruit ripening period, the fertilizer and water management should be evenly dry and wet to prevent fruit cracking. Lateral branches are easy to occur between leaf axils and must be pruned frequently and in time.

Control of Diseases and insect pests of Black Tomato

1. Black tomato late blight: spray application, you can choose 40% carbendazim wettable powder, 58% metalaxyl manganese zinc wettable powder, 64% disinfectant alum wettable powder, 72% urea manganese zinc (DuPont Kelu) wettable powder, 69% Anke manganese zinc wettable powder 1000 times.

2. Botrytis cinerea of black tomato: spray can choose 50% Sukeling wettable powder 2000 times liquid, 50% Prohydantoin wettable powder 1500 times liquid, 60% Fangmaibao ultra-fine powder 600x liquid, 45% thiabendazole suspension 4000 times liquid, 2% Wuyimycin water agent 4000 times liquid, 50% Nongliling wettable powder 1500 times liquid, and so on.

3. Black tomato virus disease: spray 1% soapy water with 0.2% potassium dihydrogen phosphate or 0.4% soybean milk or soybean milk powder before tomato seedling separation, planting, vine binding and branching to prevent contact infection. Spraying NS-83 100fold solution before and after planting could enhance the disease tolerance and yield of tomato. At the same time, it can also be prevented and treated with 20% virus A wettable powder 500 times.

4. physiological diseases of tomato: the seedlings should not be planted too densely and the growth should not be too luxuriant, and the age of seedlings cultivated in winter and spring should not be less than 60 days. Appropriate application of chemical fertilizer, proper combination of nitrogen, phosphorus and potassium fertilizer, avoid partial application of nitrogen fertilizer, especially pay attention to not excessive application of ammonia nitrogen fertilizer. Increase the application of potassium fertilizer and more mature organic fertilizer to improve soil physical properties and enhance soil water conservation, drainage capacity and permeability. Irrigate properly, do not irrigate too much at one time, and keep the soil suitable for moisture. Pay attention to drainage after rain. After fruit setting, compound micronutrient fertilizers such as potassium dihydrogen phosphate were sprayed on 15-20 days and applied continuously for 2-3 times.

Harvesting of black tomatoes

Black tomatoes in the open field can be harvested about 60 days after planting. Storage or long-distance transportation is best harvested in the color-changing period or semi-mature period. Fresh fruit on the market is best harvested in the near ripening period. Timely early harvest can increase the early yield and output value, and is beneficial to the growth and development of flowers and fruits in the upper part of the plant.

With regard to the planting method of black tomato, we should first understand its growth habits, select a suitable and excellent variety, and then plant it. After planting, field management is also very important, timely topdressing and watering should be done well. It is also necessary to strengthen the pest control of black tomato, only in this way can it grow well.