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Control methods choose suitable soil planting peach trees. Soils with strong calcareous properties, poor organic matter, shallow soil layers and poor physical and chemical properties are not suitable for planting peach trees.
When iron deficiency symptoms are severe, iron fertilizer must be applied in a timely manner. Common iron fertilizers include ferrous sulfate, ferrous ammonium sulfate, chelated iron, and ferric citrate. There are many methods for applying iron fertilizer, which can be selected according to actual conditions. 1 After germination, the peach leaves are sprayed with 0.3%-0.4% ferrous sulfate solution or 0.1%-0.2% chelated iron solution, sprayed every 5-7 days, and sprayed for 2 or 3 times. The control effect is better. . 2 Use 0.3% to 0.5% of ferrous sulfate solution to inject into the trunk, or drill holes in the trunk. Each tree contains 1 to 2 grams of ferrous salt, which can effectively prevent iron deficiency. 3 Dig 8 to 10 holes under each tree, concentrate them with 2% ferrous sulfate solution, and apply 60-75 kilograms to each tree. Can also be 0.5% to 0.6% of ferric citrate solution into the vial, digging roots, root immersed in the vial solution and buried in the soil again, each tree buried 4 vials, the effect is very good.
Intensive efforts to prevent and cure yellow peach disease
Symptoms and harms Peach tree iron deficiency can cause yellow leaf disease. The symptoms mostly appear from mid-April. At the beginning of the disease, the young shoots on the top of the shoot turn yellow, and the veins on both sides of the shoot are still green, and the lower leaves are also normal. With the growth of new shoots, the disease gradually becomes heavy, the young leaves on the top of the new tree shoots are utterly chlorotic, the veins are light green, the whole leaf turns yellow-white, and brownish brown spots may appear. In June and July, when the condition was serious, the upper leaves of the new shoots became small and there was an early fall. After the rainy season in July and August, the symptoms were reduced, and a few leafless green leaves could be extracted from the top of shoots. In August and September, a few new leafless green leaves can be seen at the tip of the diseased tree shoots. There are several old leaves at the base of the shoot. When the iron deficiency is severe, the new shoots are short in internodes, weak in their branches, and their flower buds are not full, which seriously affects the yield and quality.