What kind of medicine is used in rice yellow leaves?
There are many reasons for the yellow leaves of rice, and only when the reasons are found can we prescribe the right medicine to the case. What kind of medicine is better for yellow leaves of rice?
What kind of medicine is used in rice yellow leaves?
There are many reasons for the yellow leaves of rice, which need to be found in order to prescribe the right medicine.
1. Lack of elements in the process of rice growth usually leads to yellowing of leaves. For example, brown spot and red spot often occur in rice due to lack of potassium fertilizer. most of them change from yellow to brown at the tip and edge of the old leaves from mid-tillering to heading, resulting in irregular brown spots. Magnesium deficiency at first faded from the vein color between the leaf tip and the edge, and then changed from light to yellow. The main characteristics of sulfur deficiency in rice are chlorosis and yellowing. The solution is to spray potassium sulfate and magnesium sulfate on the leaves.
2. Rice leaves were infected with rice leaf blast, leaf tip and leaf margin were withered and yellow, and there was a brown necrotic line running through the center of the disease spot. In the initial stage of the disease, 22 grams of 75% wettable powder per mu, 30-50 kg of water, foliar spray. Not only this disease, but also other bacterial diseases can cause yellow leaves of rice, such as leaf blight and blight, which need to be applied according to the specific condition.
3. The yellow leaves of rice caused by pesticide damage can be alleviated by foliar spray of plant growth regulators such as brassinolide, gibberellin or elicitor, repair the injury caused by pesticides and fertilizers and restore the normal growth of rice.
4. The leaf tip of rice becomes yellow or withered due to the harm of thrips, planthoppers and borer. Use 25% buprofezin powder 25g / mu and 50 kg foliar spray with water. Imidacloprid, acetamiprid, thiazide and other agents can also be used. If the control effect is not ideal at one time, it can be controlled many times at intervals of ten days and a half months.
Generally speaking, only by finding the specific cause of the disease can we find remedial measures in time to make the rice grow better.
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