Causes and control methods of yellowing of balsam pear leaves

Balsam pear is a favorite vegetable in summer, although it tastes bitter, it has the effects of clearing heat and relieving heat, tonifying the kidney and spleen, and is favored by consumers in summer. Because of its bitter taste, it has few diseases and insect pests, so the planting area is constantly expanding, but the leaves are often yellowed and withered when planting, so let's take a look at the pro-agricultural network.

1. Lack of fertilizer

During the growth of balsam pear, the lack of nitrogen will lead to fewer leaves, and gradually turn yellow from the lower part of the leaf, the internodes at the growth nodes have obvious symptoms of shortening, leaf veins prominent yellowing, and finally the whole leaf yellowing. As a result, the fruit trees are few, the expansion is slow, and the fruit is prone to deformity.

Prevention and control methods: to master fertilization technology, timely and appropriate amount of fertilization, especially to pay attention to the application of nitrogen fertilizer, fertilization should also pay attention to the amount of application. Before flowering and fruiting, plant growth needs less nutrients, so it is appropriate to apply fertilizer at this time; after flowering and fruit setting, it is necessary to appropriately increase the amount of fertilizer to ensure the success of fruit setting; in the fruiting period, plant growth and fruit need a lot of nutrients, so it should be re-applied; in the late fruiting stage, the plant begins to senescence, and appropriate fertilization is needed to prevent premature senescence from causing poor fruit growth.

2. Excessive stagnant water

Balsam pear has many lateral roots and developed root system, so it likes moist environment, but it is not resistant to waterlogging. It grows faster in about 85% humidity and relative soil environment. However, if there is too much water in the soil, it can easily lead to rotting roots and make the leaves wilt.

Prevention and control methods: watering should depend on plant growth and climate, dry climate, dry soil, timely watering to replenish water, and rainy weather to do a good job of drainage and waterlogging to prevent stagnant water.

3. Natural aging

The plant of balsam pear is similar to the growth of vines, it has luxuriant branches and strong branching power, but in the later growth stage, some leaves of balsam pear are yellowing due to the rapid growth and lack of nutrition supply.

Prevention and control methods: pruning in time, remove the lateral vines growing below 50cm in time, leaving only 1-2 strong lateral vines to ensure the supply of nutrients and allow them to grow. In the later stage of the fruit, the senescent yellow leaves and weak lateral branches were removed in time, part of the nutrients were consumed, and then the results were affected.

4. Diseases and insect pests

Many diseases and insect pests will cause balsam pear yellow leaf phenomenon, such as anthracnose, root nematode disease and vine blight, these diseases in the development process, some of these conditions will make balsam pear yellow leaf phenomenon.

Prevention and control methods: strengthen the prevention and control of diseases and insect pests, strengthen management, find that the yellow leaf phenomenon should be dealt with in time, careful observation, is the kind of disease leading to the yellow leaf phenomenon, timely removal in the right medicine.

The above are the causes and control methods of balsam pear leaves yellowing brought by pro-agricultural network. I hope it can help you. If you want to know more about balsam pear planting technology, please pay attention to pro-agricultural network.