Effect of temperature on the stationary life stages of the eastern citrus moth Eutetranychus orientalis (klein) (Acari: Tetranychida) when fed on leaves of Albizia lebbeck L.

Abstract

A field trial was conducted in one of the fields of Ibn Al-Bitar Preparatory Vocational- Holy Kerbala Governorate, during spring season at
2021, to know the effect of organic fertilizes (0, 2000 Kg ha-1 Cow, 2000 Kg ha-1 Poultry ,1500 Kg ha-1 cow+ 500 Kg ha-1 Poultry,1000
The eastern citrus moth, Eutetranychus orientalis, is one of the most important plant pests that affect agricultural crops around the world.
This study aims to determine the effect of different temperatures on the growth stages of the eastern citrus moth E.orientalis (Klein) on some
vegetable crops and to predict the population according to the prevailing temperature. The development times of E. orientalis (Klein) were
evaluated in vitro on a leaf disc excised from Albizia at various temperatures of 20, 25 and 30 ± 2 C° with 60 ± 5% relative humidity (R.H)
under laboratory conditions. The total incubation period of eggs at temperatures of 20C°, 25C°, 30C° was (7.9±0.91 5.65±0.82 3.2±0.55)
days, respectively, while the number of eggs per female was at the same temperatures. They were (4.16±1.06, 8.33±0.94, 7.16±1.34
eggs/female). It was found that the male hatches before the female. Also, females live longer than males. The results showed that the life
cycle of E.orientalis was (20.45±1.5 14.7±1.47 9.76±0.93) per day at 20 °, 25 C°, 30C° The sex ratio and duration of the
immature stages of active and dormant E. exogenous were studied. The growth time of females and males, the period before laying eggs, is
observed.