تاثیر کوددهی نیتروژن در نهال‌های عناب بر زیست‌شناسی و پارامترهای جدول زندگی سنک عناب Monosteira alticarinata (Hem.: Tingidae)

Nitrogen is among the main abiotic factors modifying plant physiology and growth. Consequently, via bottom-up processes, it also can affect the performance of herbivorous insects. In this study, the effect of different levels of nitrogen fertilization in jujube seedlings on some physiological parameters of this plant, as well as the biology and life table parameters of jujube lace bug Monosteira alticarinata (Hem.: Tingidae), one of the important pests of jujube trees in South Khorasan province was investigated. The experiments were conducted with 50 individuals of the same age using arenas consisting of jujube leaves inside Petri dishes under laboratory conditions (25 ± 1 °C, 65 ± 5% RH and 16:8 L:D). The fertilizer treatments were administered at 0, 50, and 100% of recommended rates in region. The content of chlorophyll a, b, total chlorophyll, nitrogen and protein were significantly higher and the phenolic contents and and C/N ratio were lower in plants under application of nitrogen fertilizer compared with other treatments. The increase of nitrogen had no effect on pre- and post-oviposition of lace bug, however, the adult longevity and duration of oviposition period increased. The intrinsic rate of natural increase (r) (0.165±0.01), the finite rate of increase (λ) (1.179±0.016), the net reproductive rate (R0) (2487.63±474.06), gross rate reproduction (GRR) (2760.86±517.88), mean generation time (T) (47.51±1.12), daily and total fecundity of lace bugs (3.61±0.12 and 139.16±7.53 eggs respectively) feeding on plants treated with the highest nitrogen dose were the highest, but doubling time (DT) (4.21±0.13) was the lowest. An increase on the performance of M. Alticarinata can be due to an increase in the nutrient contents such as nitrogen and protein and also a reduction in phenolic compounds in case of the 100% nitrogen fertilization. The present study showed that increasing nitrogen availability to the plants has the potential to increase population of the jujube lace bug and its damage to jujube trees.