There are two possible reasons for this: First, some growers applied base fertilizers to the orchards last fall and during the spring application of budding fertilizers, they applied the fertilizer too close to the root system, resulting in root burning. Which part of the tree root is burned, corresponding to which part of the kiwifruit on the tree, the phenomenon of yellowing occurs. Second, when fruit growers fight drugs in the orchard, the concentration of pesticides is too large and the fluff on the kiwifruit is burned. In short, the main problem is in the root system. If this happens, the fruit grower can plan to uncover the part of the underground root corresponding to the yellow kiwifruit and check the root system to confirm the cause. If the root is dead, remove the bad root and apply it to the root. Powder + "brilliance" to improve the body's immune ability, enhance tree resistance, so that the tree gives off a new root. Among them, "bi-guard" can be applied as a root or sprayed. Diagnostic Equipment,Hpv Dna Sequencing,Clinical Dna Gene Sequencer,Pcr Molecular Test Nanjing Superyears Gene Technology Co., Ltd. , https://www.superyearsglobal.com