نوع مقاله : مقاله پژوهشی
1 دانشجوی سابق کارشناسی ارشد، گروه گیاهپزشکی، دانشکده کشاورزی، دانشگاه ولی عصر(عج) رفسنجان
2 دانشیار، گروه گیاهپزشکی، دانشکده کشاورزی، دانشگاه ولی عصر(عج) رفسنجان
3 استادیار، گروه ژنتیک و تولید گیاهی، دانشکده کشاورزی، دانشگاه ولی عصر(عج) رفسنجان
عنوان مقاله [English]
In this paper, developmental time, survival rate, and reproduction of Tetranychus urticae Koch on common bean under the influence of Biolog siderophoric (an induced resistance compound in plants) were investigated. The laboratory conditions in this study were 75±10% R.H. and 16L: 8D at three constant temperatures (25±1, 30±1 and 35±1 °C). The soil of each pot received 0.2 ml of Biolog siderophoric diluted in 100 ml water. Leave discs of the treated plants were collected after 48 h for the experiments.Results showed that total developmental time of T. urticae was 35.87± 0.02, 56.45±0.05, and 30.23±0.02 days at 25, 30 and 35 °C, respectively. Developmental time of different stages increased as the temperature elevated from 25 to 30 °C, but decreased as the temperature was raised from 30 to 35 °C. The intrinsic rate of increase (r) was 0.16±0.0007, 0.10±0.0006, and 0.18±0.0007 day-1, at 25, 30 and 35°C, respectively. There was a significant difference among the intrinsic rate of increase at the three temperatures. The net reproduction rate (R0) was 48.25±0.72, 25.76±0.43 and 39.42±0.49 offspring at the mentioned temperatures. There was a significant difference between the net reproduction rates at the three temperatures. Our results showed that biolog siderophoric had the best effect on reducing the population of T. urticae at 30 °C, due to the lowest intrinsic rate of increase and the most longevity occurred in this temperature.