Author/Authors :
Amin-Naseri Mohammad Reza نويسنده , Associate Professor of Industrial Engineering, Faculty of Engineering, Tehran, Iran , Khanjani Mohammad نويسنده Department of Plant Protection, College of Agriculture, Bu Ali–Sina University, Hamadan, I. R. Iran. , Javadi Khederi Saeid نويسنده Department of Plant Protection - Faculty of Agriculture - Bu-Ali Sina University, Hamedan , Ahmad Hoseini Mohammad نويسنده Department of Plant Protection - Faculty of Agriculture - Bu-Ali Sina University, Hamedan
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.
