Citrus sulfur deficiency symptoms When the citrus is short of sulfur, the whole shoot is yellow, and then the branch shoots are also yellow, the leaves become smaller, and the diseased leaves fall off in advance. The old leaves are still green and there is a clear contrast. The main vein of the diseased leaf is slightly yellowder than other parts, especially the base of the main vein and the wing leaf area are more yellow and easy to fall off. The new shoots are thin and mostly clustered. There are many sulfur-containing impurities or compounds in the air. Even in rural fields, rainwater contains sulfur. In the fields near the cities and factories, rainwater contains more sulfur. In addition, irrigation water and some fertilizers (ammonium sulfate, potassium sulfate, and potassium sulfate compound fertilizers, etc.) and pesticides (lithium sulfur, etc.) contain sulfur. Therefore, citrus cultivated in the field rarely shows symptoms of sulfur deficiency. Hot Melt Machine,Four-Column Hot Melt Equipment,Saddle Type Hot Melt Machine Wuxi DIZO Ultrasonic Technology Company , https://www.dizosonic.com