Volume & Issue: Volume 3, Issue 2, Spring 2014 

Redescription of male and female of Paraneognathus wangae (Fan & Li) (Acari:Caligonellidae) with a key to all known species of the genus Paraneognathus

Pages 145-151

https://doi.org/10.22073/pja.v3i2.17132

Fariba Ardeshir, Mohammad Bagheri, Saeed Paktinat

Abstract On the basis of specimens collected from Iran, the characteristics of Paraneognathus wangae, which is a new record for the Iranian fauna, are given and a key to all known species of Paraneognathus is also provided.

Effect of temperature on development and fecundity of the brown mite, Bryobia rubrioculus Scheuten (Acari: Tetranychidae) on apple

Pages 153-161

https://doi.org/10.22073/pja.v3i2.10146

Saeid Javadi Khederi, Mohammad Khanjani, Mohammad Ahmad Hoseini, Mohammad Reza Amin

Abstract Brown mite, Bryobia rubrioculus Scheuten, is one of the most important pests of apple trees in western Iran. Development and fecundity of this mite were studied on apple at five constant temperatures (20, 22.5, 25, 27.5 and 30°C), 60 ± 5% RH and a photoperiod of 16:8 h (L: D). The developmental time of immature stages ranged from 39.65 ± 0.96 days at 20°C to 18.18 ± 0.47 days at 30°C. The lower temperature threshold (t) and thermal constant (k) of the immature stages were estimated to be 12.9°C and 279.7 degree days (DD), respectively. The average adult longevity of females was determined to be 16.75 ± 1.14 days at 20°C to 8.58 ± 0.38 days at 30°C. The highest and lowest mean number of eggs per female during adult life was 4.79 ± 1.36 and 3.75 ± 1.49 at 30 and 20°C, respectively. The results of this study can be used to predict the development and population dynamics of B. rubrioculus.