Keywords
rootstock
citrumelo
flower bud
open flower
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Abstract
Rising temperatures in 2022 and 2023 on the Peruvian coast altered the phenological phases of citrus fruits. The absence of the low temperatures necessary for floral induction negatively impacted flowering and fruit production.This research was conducted in 2022 and evaluated the flowering and fruit set behavior of 5-year-old mandarin (Citrus reticulata) cv W. Murcottwith Citrumelo rootstock grown under drip irrigation at the Santa Rosa Irrigation System, Lima Region. A Completely Randomized Design was used with3 replicates and 3 treatments comprising water stress periods: T1: 9 days; T2: 17 days; and Control: constant irrigation. The following parameters were quantified: flower buds, open flowers, and set fruit. Based on the results: T2 showed a significant difference in the number of flower buds, open flowers, and set fruit, yielding a total of 714 fruits, much higher than T1 with 69 fruits and T0 with 3.14 fruits. Based on these data, an estimated yield of 45 tons of fruit was projected with the 17-day treatment. Compared to the 9 -day treatment, which yielded 4 tons, the control yield was almost zero. It is concluded that the T2 treatment presents better results in all the evaluations of the studied parameters and that the more days of stress, the greater the flowering and fruit set intensity, projecting better production and profitability.
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