Peach is a common fruit in life and a fruit that most people like to eat. In the process of planting peach trees, many diseases will be encountered. Yellow leaf disease is one of the common diseases. If it is not timely prevented, it will lead to severe reduction of peaches. This article will introduce the method of using peach tree yellow leaf disease.
Symptoms and hazards: Iron deficiency in peach trees can cause yellow leaf disease, and the symptoms begin to appear in mid-April. In the early stage of the disease, the young leaves at the top of the new shoot turned yellow, while the veins were still green on both sides, and the lower old leaves were also normal. With the growth of new shoots, the condition is getting heavier, the young leaves of the whole tree are severely chlorotic, the veins are light green, the whole leaves turn yellow-white, and brown brown necrotic spots may appear. In June and July, when the condition was severe, the upper leaf shape of the new shoot became smaller and there was a premature fall. After the rainy season in July and August, the symptoms are alleviated, and several chlorotic leaves can be extracted from the top of the shoots. In August and September, there are several chlorotic new leaves at the top of the new shoots of the diseased tree. There are several normal old leaves at the base of the new shoots. When the iron deficiency is serious, the new shoots are short, the branching power is weak, and the flower buds are not full, which seriously affects the yield and quality.
Control method: Choose suitable soil for planting peach trees. Peach trees are not suitable for soils with strong calcareousness, poor organic matter, shallow soil layers and poor physical and chemical properties. When the symptoms of iron deficiency are serious, iron fertilizer must be applied in time. Common iron fertilizers are ferrous sulfate, ammonium ferrous sulfate, chelated iron and ferric citrate. There are many methods for applying iron fertilizer, which can be selected according to the actual situation.
1 After the peach leaves are germinated, spray with 0.3%-0.4% ferrous sulfate solution or 0.1%-0.2% chelated iron solution, spray once every 5-7 days, spray a total of 2-3 times, the control effect is better. .
2 Use 0.3%-0.5% ferrous sulfate solution to inject into the trunk, or drill holes in the trunk. Each tree is stuffed with 1-2 grams of ferrous salt, which can prevent iron deficiency.
3 Dig 8-10 small holes under each tree and concentrate them with 2% ferrous sulfate solution, 60-75 kg per application. It is also possible to put a 0.5%-0.6% ferric citrate solution into a vial, excavate the roots, immerse the roots in the vial solution and re-buried the soil, and embed 4 vials per tree, which is very effective.
Digital Door Viewer,Door Eye Viewer,Door Peehole Viewer, brass door viewer,peehole for home
Leader Hardware Manufacturer Limited , https://www.leaderhardwarecn.com