Why are the stems of Xizhou honeydew melon turning yellow and wilting?

The reasons for the yellow leaves caused by the first situation are more complicated. Since the leaves turn yellow, there must be a lack of chlorophyll. The lack of chlorophyll is often caused by a lack of elements such as magnesium, nitrogen, potassium, iron, and zinc. It is difficult to figure out whether the lack of these elements is due to climate, soil or root causes. Generally speaking, the main cause of mineral element deficiency is soil problems. In the case of continuous cropping, excessive use of chemical fertilizers causes secondary salinization of soil, which in turn inhibits the absorption and utilization of trace elements by crop roots. The greater the application amount, the stronger the inhibitory effect, forming a Vicious cycle. Therefore, in order to solve the problem of yellowing of the lower leaves of cantaloupe, we should focus on dealing with soil salinization. Spraying foliar fertilizers just a few times is difficult to achieve. You can use Ramratrim inoculant to adjust the soil pH value.

The yellow leaves caused by the second situation should be bacterial leaf blight. Some people also call it bacterial leaf spot. It is mainly caused by wounds caused by leaf friction. In addition, rainy and humid weather can easily cause spread. Spread, why wouldn't copper preparations or antibiotics be ideal? First, because the disease resistance of the bacteria has increased, when the disease attacks rapidly, single medication often has little effect. Second, bad weather makes prevention and treatment more difficult, and the efficacy of medicine is often greatly reduced. It is recommended that for the prevention and control of bacterial leaf blight, streptomycin or neophytomycin or copper preparations can be sprayed in the early stage of the disease. A single application will have better effects. If the disease is in high-incidence period, it is recommended to apply Shigao or other azole fungicides mixed with copper thiazide or Longke bacteria, and appropriately mix antibiotics.

In addition, rainy weather or shading between plants can also cause yellowing of leaves. In addition to improving ventilation and light transmission conditions between plants, it is also very beneficial to adopt measures of upper spraying and lower irrigation. A special reminder is that leaf yellowing often occurs regularly, that is, when the vines are just hanging in early autumn, so nutrient deficiency should be prevented at an early stage to prepare for a rainy day.