Effects of auxin and some plant nutrition applications on defoliation in interdonato lemon cultivar

This study was conducted in the main plot established according to the 'Randomized Complete Block Design' in a producer's garden in Salmanbeyli village, Adana. Each tree was considered as a replication, and the experiment was carried out with 7 treatments, each having 10 replications. Plants of the" Interdonato" lemon variety grafted onto C-22 (Bitters) rootstock were used. The treatments were applied by spraying the leaves. The aim of the treatments was to reduce leaf drop in the "Interdonato" lemon variety. It has been determined that auxin and applied plant nutrition applications have statistically different effects on leaf defoliation, PS II and most plant nutrient elements (N, P, K, Ca, Mg, Mn, Fe, Cu). From the applications, it was found that the application of 2, 4-D + [Co (1%) + Mo (1%) + N (3%) + K (1%)] reduces foliation, very slightly, compared to other applications. However, it has been expressed that defoliation in "Interdonato" lemons is caused by factors other than the applications applied, and that the applications made are insufficient to prevent defoliation.