Response of Two Potato Varieties Solanum tuberosum L. to Spraying with Moringa Leaf Extract on Crop Storage Characteristics

The study was conducted in Bazian district which is located within Sulaymaniyah Governorate for spring season of 2022 to study the response extent of two potato varieties class E (Hermes and Metro) and four levels of moringa leaf extract (0, 5, 10, 15%) to the storage characteristics of produced tubers of potato. The experiment was carried out using a split plot design within a randomized complete block design (R.C.B.D) with three replications, varieties treatments were placed in the main plots and spray treatments with moringa leaf extract were placed as a sub plots. The results showed that the varieties factor did not show significant differences between their averages in studied traits effect, but the two varieties showed a close effect that did not reach the limits of significance. While the spraying treatment with different concentrations of moringa extract had a significant effect, as spraying with a concentration of 5% of the extract excelled and gave the highest values for the percentage of sprouted tubers, which amounted 30.36%. The 10% concentration treatment of the extract also excelled in terms of percentage of dry matter and starch percentage as well as tubers specific density, the results reached (27.02%, 20.43%, 1.114075 g cm 3 ), respectively. The interactions between the treatments showed a significant increase in dry matter percentage and germinated tubers percentage.