How do tomato blotchy fruits occur? Latest analysis of the causes
Tomato blotchy fruit is a physiological disorder of tomatoes. It generally appears mainly during the color-turning stage of tomato fruits, when the fruit color is uneven, with one patch red and one patch green. If the fruit is cut open, the vascular bundle tissue of the fruit can be seen to be black and rotten, and it basically has no commercial value. So what causes tomato blotchy fruit? Below, the editor will briefly introduce it to everyone. Let's take a look!
1. Excessive nitrogen fertilizer
When tomatoes are growing, their growth capacity is relatively strong, so attention should be paid to applying an appropriate amount of fertilizer. If the chlorophyll content of tomatoes is too high, it will inhibit the formation of lycopene, causing yellow spots to appear on the tomatoes. Also, when fertilizing, pay attention to controlling the amount of nitrogen fertilizer. If there is too much nitrogen fertilizer, it will lead to an excessive ammonium ion content in the soil, hindering the absorption of potassium by tomato roots. This will obstruct nutrient transport in the tomato, and the tomato fruits will also show undesirable phenomena such as blotchy and necrotic areas due to insufficient nutrients.
2. Light reasons
Light is very important for the growth of tomatoes. During the growth of tomatoes, if severe leaf disease occurs or excessive pruning and removal of side shoots causes the tomato leaf area to be too small, then the leaves cannot provide shading for the fruits, making the fruits prone to prolonged direct sunlight and increased temperature. In an environment with excessively high temperature, the formation of lycopene in tomato fruits will also be affected, causing the tomato fruit skin to turn yellow. However, it also cannot be under weak light and low temperature for a long time, otherwise it will affect the photosynthesis of tomatoes, weaken the plant's absorption capacity, and reduce nutrient accumulation in the plant.
3. Other reasons
When planting tomatoes, if the surrounding environment is too humid, it will inhibit the transpiration of tomato plants, reduce root water absorption, obstruct nutrient absorption in tomatoes, and lead to the blotchy fruit phenomenon. Then there is the reason of continuous cropping and repeated planting. If tomatoes are repeatedly planted on the same land, diseases such as root rot and fusarium wilt are likely to occur, causing chronic death of the plants. Or long-term application of large amounts of chemical fertilizers leads to soil compaction, while the application of elements such as zinc, calcium, and iron is neglected, thereby causing blotchy fruit.
4. Control methods
First, when applying humic acid types and biological fertilizers, we should pay attention to maintaining a good ratio of nutrients such as nitrogen, phosphorus, and potassium. Control the amount of nitrogen fertilizer and increase the proportion of potassium fertilizer, especially during the tomato fruit development stage. Then, watering should maintain the principle of watering when dry and withholding when wet, mainly by watering more frequently in small amounts. Then maintain a good temperature inside the greenhouse and control the temperature difference. Pay attention to planting density; do not plant too densely, to avoid poor plant permeability and affected ventilation. Finally, pay attention to spraying micro-fertilizers to supplement trace elements for the plants and reduce the blotchy fruit phenomenon.
The above is a brief introduction to the causes of tomato blotchy fruit. That is all for today's introduction. This article is for reference only, and I hope it can help everyone!