What Causes Watermelon Vine to Turn Yellow
An introduction to the causes of yellowing watermelon vines and the reasons for yellowing and withering leaves, as well as the small experience of green plant maintenance, keep reading below!
Hello everyone, today let's talk about watermelon cultivation. I'm sure you've all eaten watermelon and seen it, and it's no surprise that watermelon is a vine plant. So, in the process of growing watermelon, which part do you think is the most important? Some people say that the most important part of growing watermelon is the seedling stage, but while the planting stage is important, it does not affect the annual harvest. The most crucial stage is actually during the growing period, as the cultivation and management of the plants directly affect the farmers' income. For farmers to have a good harvest, they must manage the plants properly during the growing stage, and only by doing so can they achieve a good harvest. Today, the editor will share some key points with you.
1. Dwarf Leaf, Shrunken Leaf, and Yellow Leaf Phenomenon
This phenomenon is very common in watermelon seedlings during the growing period, and most of it is caused by lack of water. Therefore, it is essential to have a sufficient water irrigation system in the watermelon field to help the seedlings absorb water. Among these, yellow leaves are a relatively obvious sign, mainly caused by drying due to lack of water. Additionally, this phenomenon may also occur due to insufficient intake of vitamins, so our fertilizers must contain trace elements such as calcium, magnesium, and boron to ensure that watermelon does not exhibit dwarf leaf symptoms. Of course, it could also be caused by diseases, especially pests, which may lead to shrunken leaves if not enough herbicides or insecticides are applied during planting.
2. Melon Vine Lesions
2.1 Melon Vine Leaf shrinkage
This phenomenon usually occurs after consecutive cloudy or rainy days followed by a sudden sunny day. It is mainly caused by the strong transpiration of the leaves, leading to a rapid loss of water from the leaf surface, while the root system's water absorption capacity has not yet recovered, resulting in an imbalance of water in the roots and leaves, causing the melon vine leaves to shrink. If faced with such a situation, it is recommended to provide some shading after heavy rain to prevent shrinkage, as it can be difficult to cure and may even lead to plant shrinkage and death.
2.2 Melon Vine Top Discoloration
Aside from leaf shrinkage, the most common issue is the yellowing of the entire vine's top, usually caused by pests. Since the top is the tenderest part, pests often attack from there. To effectively prevent pest infestations, it is recommended to apply insecticides and select pest-resistant plants during seedling preparation. However, sometimes the top of the vine turns black, which is not caused by pests but usually by frostbite. Therefore, during planting, it is essential to ensure that the vine top is kept off the ground or, if not possible, that the temperature is suitable and not too cold. If the vine top turns black and frostbitten, it may rot.
What Causes Watermelon Vine to Turn Yellow
3. Overcoming Measures
Protecting the vines is very important, as it relates to whether the plant can bear fruit and achieve high yields. Therefore, the following points need to be addressed during vine growth: first, avoid continuous cultivation of the same plot for more than four or five years, as this can lead to a decrease in soil fertility. It's best to use land previously planted with rice or corn for watermelon cultivation, then switch back to rice or corn after two or three years. Second, water management is crucial for vine plants like watermelon, especially during the summer cultivation period. Timely irrigation and drainage are the primary factors affecting high yields. Of course, the reasonable use of herbicides, growth regulators, and pesticides is indispensable, as without these, the plants may suffer from pests, diseases, or unstable weather conditions.
4. Abnormalities During the Fruiting Period
4.1 Excessive Growth of the Plant
This phenomenon is quite common, especially in the early stages of planting. Often, the vines extend indefinitely without producing many fruits. This is mainly caused by an excessive intake of nitrogenous fertilizer and high humidity in the field, leading to a mismatch between nutrient supply and growth cycle, causing the vines to grow wildly while producing few flowers and fruits.
4.2 Weakness of the Vine Leaves
Often, we see unassuming leaves that appear weak, lifeless, and wilted. This is mainly due to insufficient supply of vitamins and a phenomenon called "deficient fertilization." Simply put, this occurs when the concentration and amount of auxiliary organic elements during the growth period are insufficient, leading to a lack of nutrient supply to the plant. Farmers must remember that fertilization is very important and should be neither excessive nor insufficient.
4.3 No Fruit Setting
This phenomenon is mainly caused by an imbalance of nutrients during the flowering period. Usually, excessive fertilization during the flowering period leads to nutrient imbalance, causing the vines to grow excessively and the flowers to lack nutrients, resulting in a low fruit-setting rate. It is recommended to closely monitor the flowering process and make timely corrections if any adverse conditions arise.
This article shares the complete content on why watermelon vines turn yellow, the reasons for yellowing and withering leaves, and the treatment methods, providing you with a comprehensive understanding and reference!