Winter melon can not only be eaten as a vegetable, but can also be processed into various types of candies and other purposes. Therefore, it is widely cultivated all over my country. Winter gourd is more adaptable, but because many farmers adopt extensive management and continuous cropping, the phenomenon that winter gourd does not grow new roots is more common, which has a certain impact on yield and quality. 1. Wax gourd is a temperature-loving and heat-resistant vegetable that grows well at higher temperatures. It is easy to be frozen when the light is weak and the humidity is high. The optimum temperature for growth and development is 25-30℃, the optimum temperature for seed germination is 28-30℃, and the minimum temperature for root growth is 12-16℃. If the temperature is too low, the differentiation of wax gourd roots will be seriously affected, and it will be difficult to slow down the seedlings, and new roots will not grow. In severe cases, the seedlings will die. Therefore, it is necessary to strengthen the light, increase the temperature (in the shed), and promote the growth of wax gourd roots. In case of rainy weather, you can increase the temperature and supplement the light appropriately to avoid the low temperature causing the wax gourd to not grow new roots. 2. The lack of new roots in winter melon is also related to fertilizer and water management, which is an old topic. Application of immature organic fertilizer will cause burning of roots and seedlings in the process of dissociating the heat; application of too much chemical fertilizer will easily increase the ion concentration in the soil, which will cause the water loss of wax gourd cells to cause plasmolysis, thereby Cause no new roots. In addition, wax gourd is wet and not drought-tolerant, so it needs to absorb a lot of water. As a result, many farmers will water a large amount of water at one time during irrigation, resulting in heavy soil texture, soil compaction, and poor soil permeability, affecting the gas exchange and absorption on the surface of the wax gourd root system, weakening the root vitality, and hindering the root system from taking nutrients. The absorption and utilization of vinegar affects the normal growth of the root system, and the phenomenon of no new roots appears. In this regard, it is recommended that farmers pay attention to whether the organic fertilizer has been fully decomposed when applying basic fertilizer, and the interval between fertilization and planting should not be too close, and the use of chemical fertilizers should be reduced. Do not over-water at one time when watering, but water frequently with small water. 3. Winter melon root nematode disease is also one of the reasons why winter melon does not grow new roots. Mainly caused by root nematode infestation. When it invades, it will pierce the roots of wax gourd with a needle, especially the tender parts of the root system (fibrous roots and lateral roots), puncture the root cell wall, and secrete saliva, which enters The root tissue will produce chemical effects to stimulate abnormal root growth. The roots will grow many nodules of different shapes and sizes, which are white in the early stage and dark brown in the later stage. These root knots will prevent the root system from absorbing water and fertilizer, which will affect the normal growth of the root system and cause the winter melon to not grow new. root. The methods of preventing and controlling root nematodes of wax gourd mainly include the following aspects, which farmers should use comprehensively in order to obtain the best control effect. 1. Use disease-free soil to grow seedlings, strengthen field management, and remove diseased roots in time. 2. Increase the application of organic fertilizers to promote the growth of new roots and enhance plant disease resistance. 3. Plowing the soil before planting, and the severely diseased fields can be used for paddy and dry rotation. 4. Before transplanting wax gourd, use Tonkali granules in furrow, hole or whole field. If the wax gourd is harmed by nematodes during the growth period, use the tore root sand water solution (tore root sand water solution + root strong / root spirit) to irrigate the roots. Disclaimer: Some articles on this website are transferred from the Internet. If the legal rights of a third party are involved, please inform this website for processing. phone Blood Collection Needle,disposable blood collecting needle,retraction type blood collection needle Shandong Zhushi Pharmaceutical Group Co.,LTD , https://www.sdzs-medical.com