What to Do When Peanut Leaves Turn Yellow? Causes and Solutions
Yellow leaves on peanuts are a common phenomenon in the peanut growing process, and this is also a headache for farmers, especially the yellowing of leaves caused by irrigation after rainfall, which causes reduced peanut yields. So what are the causes of yellow peanut leaves? How should they be solved? Let's find out together.
1. Zinc deficiency
When peanuts are deficient in zinc, the leaves turn yellow and white, and the leaves are relatively small. The most obvious feature is that the peanut leaves grow in clusters and the plants become shorter. Zinc deficiency in peanuts generally appears during the growing period and is relatively rare during the pod-filling stage, but this possibility cannot be ruled out.
2. Nitrogen deficiency
When peanuts are deficient in nitrogen, the leaves begin to lose green and turn yellow starting from the old leaves. The leaves become smaller and thinner, and the plants are relatively shorter. After summer peanuts enter autumn, peanuts enter the critical pod-filling stage. If there is too much rain, it will cause the loss of trace elements in the soil, leading to leaf yellowing, especially in sandy soil where it is even more obvious.
3. Iron deficiency
When peanuts are deficient in iron, yellow leaves also appear, but only the upper leaves turn yellow while the lower leaves remain normal. In cases of severe iron deficiency, the leaf veins also turn yellow. There is no obvious change in leaf size, only a change in color. So when yellow leaves appear on peanuts, you can carefully observe the symptoms of the yellow leaves to determine whether it is caused by iron deficiency. After identifying the cause, iron can be supplemented to help them recover.
4. Solutions
The three types of nutrient deficiency causing yellow leaves mentioned above are relatively common. In addition, during the peanut growing process, yellowing is often caused by multiple elements at the same time, so special attention should be paid to prevention and control. It is recommended that before peanut leaves turn yellow, use a sprayer with about 10 grams of 0.1% urea, 20 grams of ferrous sulfate, and 10 grams of chelated zinc or zinc sulfate. After one spraying, the yellow leaf phenomenon in peanuts can be effectively controlled. If one application is not enough, it can be sprayed several more times depending on the growth of the peanuts, or commonly used foliar fertilizer can be sprayed. Generally, when spraying the third round of pesticide, it is very important.
The above is an introduction to the causes and solutions for yellowing peanut leaves. We hope it can help you. If you want to learn more related knowledge, please stay tuned to us.