Akademik Veri Yönetim Sistemi
EGYPTIAN JOURNAL OF BIOLOGICAL PEST CONTROL, cilt.35, ss.1-10, 2025 (SCI-Expanded)
ABSTRACT
Background: Biological
parameters of Orius vicinus (Ribaut) (Hemiptera: Anthocoridae) on the
two-spotted spider mite, Tetranychus
urticae Koch (Acari: Tetranychidae) were investigated using Two-sex Age-stage
life table analysis. The functional response to different mite stages and prey
preference of O. vicinus was also
determined.
Results: The egg hatching ratio of O. vicinus was
94.8%, with a mean egg hatching time of 4.07 days. The total nymph development
time was 17.6 days, with a 75.7%
survival rate. Female and male lifespans averaged 15.3 and 12.5 days,
respectively. According to life table parameters, the preoviposition time
(APOP) was 4.39 days, the total preoviposition time (TPOP) was 21.85 days, and
the oviposition period was 7.2 days. The intrinsic rate of increase (r) was 0.095 days⁻¹, the finite rate of increase (λ)
was 1.1 days⁻¹, the net reproductive rate (R₀) was 12.04 eggs/offspring, fecundity (F) was 31.28 eggs/female, and the mean generation time (T) was 26 days. Functional response
analysis revealed a type III functional response to T. urticae
eggs and a type II to other stages.
Conclusion: The adult stage
of T. urticae was
the most preferred prey, while eggs were the least preferred. These findings
indicated that O. vicinus can
complete its life cycle and sustain its population on T. urticae, demonstrating its potential as an effective biological
control agent.
Keywords: Tetranychus
urticae, Orius
vicinus, Fecundity, holling disc equation,
life table.