As we all know, to select high-yield and high-efficiency tomato varieties, first and foremost is to look at market demand. We must select the varieties that consumers like, including the shape, color, and hardness of tomatoes; second, we must purchase national research institutes and qualified large-scale seed enterprises. Seeds to ensure that the seedlings are pure and have the potential to increase yield.
Here, the author focuses on the aspects that are easily overlooked by vegetable farmers, that is, according to different estuaries, select the appropriate varieties.
To plant the cold tomatoes in early spring, an "early" word is preferred. Some people say: Can I plant it earlier? No way. Planting in early spring is limited by temperature, and some varieties are not suitable for low temperature planting. Therefore, early maturing varieties should be selected. Tomatoes have 7 leaves and fruit set, 9 leaves set fruit, in order to think of the morning market, you have to choose 7 leaves set fruit. On the same day, sowing 7-leaf fruit is usually 10-15 days earlier than the 7-leaf variety. Again, choose a variety with a short fruit development period. In normal years, tomatoes have 40 days from flowering to maturity, and there are 50 days. In order to get the morning market, 40-day mature varieties should be selected. Some people think that the variety is large, the output is high, and the income is high. actually not. Large breeds are generally late-maturing, if the ripening is too late, the price of tomatoes is low, and harvesting a few thousand pounds is not much to sell.
Planting summer tomatoes is generally conducted in May. When the market is open, it is exposed to high temperature and rainy season. There are many crackers and the disease is heavy. The fruit color and quality are not equal to those produced in greenhouses. With the tomato flowering and fruiting, it is a time of three days, so choose a heat-resistant variety. The normal temperature of tomato growth is 25°C-30°C. When the temperature exceeds 30°C for a long time, the flower development of the tomato is not normal, the malformed flower is formed, and the deformed fruit is produced. If the pollen exceeds 35°C, the pollen will soon be aborted. Therefore, no variety is true. The variety of heat resistance, which is determined by the characteristics of the tomato. In view of the high temperature in summer, physical protection measures can be taken to reduce the temperature and select the strong, leafy varieties of anti-japanese.
Delay the cultivation of autumn tomatoes, generally in June sowing, during this period should pay attention to the occurrence of yellow leaf curl virus disease, so as not to cause the absolute loss of production. The best and most effective way to prevent and treat the disease is to select resistant varieties. When it comes to anti-yellowing leaf curl virus varieties, many people think that foreign varieties are better than domestic varieties, but it is not true. The hardness of foreign varieties is higher than that of domestic varieties, and varieties with high hardness are suitable for export. If they are sold domestically, they are still good for domestic varieties. In addition, many foreign varieties because of poor heat resistance, requiring sowing after July, but such a long fruit development, due to the lower and lower temperatures in the fall, the commodity rate is low, coupled with expensive seeds, the efficiency is poor.
If autumn delays the cultivation of greenhouses, domestic and imported seeds can be selected, because early ripening and late ripening do not matter and are the off-season for the supply of tomatoes.
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