Ahmed Mohamed Farouk, Ali Radwan Mohamed, Omar Medhat Ibrahim A, Eliwa Noha Eid
Natural Products Department, National Centre for Radiation Research and Technology, Egyptian Atomic Energy Authority, Cairo, Egypt.
Biochemistry Department, Faculty of Agriculture, Al Azhar University, Cairo, Egypt.
Sci Rep. 2025 Sep 12;15(1):32433. doi: 10.1038/s41598-025-16287-9.
Pears are popular among fruits around the world, but their production faces many challenges, the most important of which is fire blight, which affects productivity and tree quality. Foliar application of organic fertilizers and natural substances could maintain productivity and fruit quality. This study was conducted on fifteen-year-old Le-Conte pear trees to evaluate the feasibility of foliar application of potassium humate, hydrogen peroxide, and gamma-irradiated licorice extract to improve yield, quality, and control fire blight. Data revealed that all individual foliar spray treatments significantly improved the fruit's physical and chemical characteristics and yield, while the percentage of fire blight infected fruits significantly decreased compared to the control (no spray). Combined sprays improved the above-mentioned parameters more than sole application. Gamma-irradiated licorice gave a more superior effect in most cases, while hydrogen peroxide was more effective in combating the fire blight infection. Combination of high levels of potassium and licorice gave the highest increment in TSS (28.1%), vitamin C (66%), and total sugars (37.5%) with maximum reduction of acidity (64.8%) while high levels of potassium and hydrogen peroxide gave the highest yield (85.3%) and maximum reduction of fire-blighted fruits (83.7%). In conclusion, Le-Conte pear trees productivity and quality can be increased, while fire blight affected fruits can be decreased, by using a foliar spray of potassium humate with hydrogen peroxide or irradiated licorice extract.
梨在世界各地的水果中很受欢迎，但其生产面临许多挑战，其中最重要的是火疫病，它会影响产量和树木质量。叶面喷施有机肥料和天然物质可以维持产量和果实品质。本研究以15年生的勒孔特梨树为对象，评估叶面喷施腐植酸钾、过氧化氢和γ射线辐照甘草提取物以提高产量、品质和防治火疫病的可行性。数据显示，所有单独的叶面喷施处理均显著改善了果实的物理和化学特性及产量，与对照（未喷施）相比，火疫病感染果实的百分比显著降低。组合喷施比单独施用更能改善上述参数。在大多数情况下，γ射线辐照甘草的效果更优，而过氧化氢在防治火疫病感染方面更有效。高钾与甘草的组合使总可溶性固形物（TSS）增幅最高（28.1%）、维生素C增幅最高（66%）、总糖增幅最高（37.5%），酸度降幅最大（64.8%），而高钾与过氧化氢的组合产量最高（85.3%），火疫病感染果实降幅最大（83.7%）。总之，通过叶面喷施腐植酸钾与过氧化氢或辐照甘草提取物，可以提高勒孔特梨树的产量和品质，同时减少受火疫病影响的果实。
