The effect of irrigation regimes and n-fertilizer levels on developmental time and parameters of fecundity life table of spodoptera exigua (hubner) on sugar beet
سال انتشار: 1392
نوع سند: مقاله ژورنالی
زبان: انگلیسی
مشاهده: 393
فایل این مقاله در 9 صفحه با فرمت PDF قابل دریافت می باشد
- صدور گواهی نمایه سازی
- من نویسنده این مقاله هستم
استخراج به نرم افزارهای پژوهشی:
شناسه ملی سند علمی:
JR_IJABBR-1-5_005
تاریخ نمایه سازی: 26 اسفند 1394
چکیده مقاله:
The beet armyworm, Spodoptera exigua, is one of the most important pests of sugar beet in Iran. The aim of this study was to determine the effect of water and nitrogen treatments of sugar beet plant on developmental time and fecundity life table parameters of the pest. An experiment was carried out under laboratory conditions (25±2oC, 70±5% R.H. and 12L: 12D) on larvae reared on sugar beet leaves collected from different treated plants. Treatmentsconsisted of three irrigation regimes, irrigation after 70, 105, 140 mm of cumulative evaporation from class A pan, and also three N-fertilizer levels, 200, 150, 100 kg/ha net nitrogen. The results showed that the longest larval and pupal developmental time, the lowestpupal weight and the shortest adult longevity were observed in 70 mm cumulativeevaporation treatment. Additionally, the longest pupal developmental time, the lowest pupal weight and the shortest adult longevity were in 100 kg/ha net nitrogen treatment. Larvae reared on leaves collected from 105 mm cumulative evaporation and 200 kg/ha net nitrogen treatment resulted in the highest intrinsic rate of increase (rm), net reproductive rate (Ro), grossreproductive rate (G. R. R.), finite rate of increase (λ), the shortest mean generation time (T) and doubling time (t). This indicated that moderate drought stress and the highest amount of nitrogen fertilizer may increase the population density of the pest
کلیدواژه ها:
نویسندگان
Roshanak Ghorbani
Agriculture and Natural Resources Research Center of Lorestan, Iran.
Jahangir Khajehali
Isfahan University of Technology, Iran.