زیست شناسی و پارامترهای رشد جمعیت سفیدبالک یاس Aleuroclava jasmini روی چهار رقم مختلف پرتقال

نویسندگان

گروه گیاه‌پزشکی، دانشکده کشاورزی، دانشگاه شهید چمران اهواز.

چکیده

در این تحقیق زیست­شناسی و پارامترهای رشد جمعیت سفیدبالک یاس، Takahashi))Aleuroclava jasmini روی چهار رقم پرتقال شامل سیاورز، والنسیا، مارس و واشنگتن در شرایط آزمایشگاهی و در شرایط دمایی 1 ± 27 درجه سلسیوس، رطوبت نسبی 5 ± 60 درصد و دوره روشنایی: تاریکی 14: 10 ساعت مورد مطالعه قرار گرفت. میانگین طول دوره رشدی مراحل نابالغ سفیدبالک یاس ماده روی ارقام سیاورز، والنسیا و مارس به­ترتیب برابر با 23/0 ± 38/31، 68/0 ± 43/28 و 67/0 ± 20/29روز بود. این سفیدبالک روی رقم واشنگتن فقط تا پوره سن سوم زنده ماند. میانگین مرگ­و­میر پیش از بلوغ کل روی سه رقم فوق­الذکر به­ترتیب 43/0 ± 77/25، 29/0 ± 00/32 و 52/0 ± 00/32 درصد و میانگین نسبت جنسی (درصد ماده) روی سه رقم به­ترتیب 45/0 ± 45/59، 63/0 ± 05/54 و 44/0 ± 76/51 درصد بود. میانگین طول عمر سفیدبالک­های بالغ ماده روی رقم­ها به­ترتیب 11/0 ± 40/3، 20/0 ± 15/5 و 22/0 ± 60/4 روز بود. میانگین تعداد کل تخم روی سه رقم به­ترتیب 45/1 ± 53/25، 62/1 ± 00/40 و 87/1 ± 66/33 بود. نرخ ذاتی افزایش جمعیت (rm)، به­ترتیب 001/0 ± 055/0، 003/0 ± 065/0 و 002/0 ± 060/0 تعداد ماده/ماده/روز و نرخ خالص تولیدمثل (R0) به­ترتیب 51/0 ± 46/6، 54/0 ± 71/7 و 60/0 ± 41/11 تعداد ماده/ماده/نسل روی سه رقم مذکور تعیین شد. نرخ متناهی افزایش جمعیت (λ) به­ازای هر روز به­ترتیب 001/0 ± 05/1، 003/0 ± 06/1 و 002/0 ± 07/1 و میانگین طول دوره یک نسل (T) به­ترتیب 221/0 ± 6/33، 435/0 ± 09/31 و 639/0 ± 69/31 روی رقم­های ذکر شده بود. زمان دو برابر شدن جمعیت (DT) روی ارقام مذکور به­ترتیب 106/0 ± 48/12، 186/0 ± 55/10 و 183/0 ± 02/9روز بود با توجه به نتایج حاصله، مناسب­ترین رقم برای رشد و تولید مثل سفیدبالک یاس رقم والنسیا بود.

کلیدواژه‌ها


عنوان مقاله [English]

Biology and population growth parameters of jasmine whitefly, Aleuroclava jasmini on four different orange cultivars

نویسندگان [English]

  • A. Ghodrati
  • P. Shishehbor
  • F. Kocheily
Department of Plant Protection, Faculty of Agriculture, Shahid Chamran University of Ahvaz, Ahvaz, Iran.
چکیده [English]

Biology and population growth parameters of Jasmine whitefly, Aleuroclava jasmini (Takahashi) were studied on four orange cultivars including Siavaraz, Valensia, Mars and Washangton under laboratory conditions (27 ± 1 oC, 60 ± 5% RH and 14: 10 h L: D). The mean immature developmental times of females on Siavaraz, Valensia and Mars were 31.38 ± 0.23, 28.43 ± 0.68 and 29.20 ± 0.67 days, respectively. A. jasmini survived only up to third nymphal instar on Washington cultivar. Immature mortality was 25.77 ± 0.43, 32.00 ± 0.29 and 32.00 ± 0.52% on the above cultivars, respectively. Mean sex ratios (percent of females) were 59.45 ± 0.45, 54.05±0.63 and 51.76 ± 0.44% on above mentioned cultivars, respectively. The mean females longevity was 3.40 ± 0.11, 5.15 ± 0.20 and 4.60 ± 0.22 days, respectively, on cultivars. Mean total fecundity was 25.53 ± 1.45, 40.00 ± 1.62 and 33.66 ± 1.87 eggs on cultivars, respectively. Intrinsic rate of increase (rm) was 0.055 ± 0.001, 0.065 ± 0.003 and 0.060 ± 0.002 number of female/female/ day and Net reproductive rate (R0) was 6.46 ± 0.51, 7.71 ± 0.54 and 11.41 ± 0.60 offspring/individualon the above mentioned cultivars. Finite rate of increase (λ) was 1.05 ± 0.001, 1.06 ± 0.003 and 1.07 ± 0.002 per days and Mean generation time (T) was 33.6 ± 0.221, 31.09 ± 0.435 and 31.69 ± 0.639 days on the above mentioned cultivars. Doubling time (DT) was 12.48 ± 0.106, 10.55 ± 0.186 and 9.02 ± 0.183 days on the above mentioned cultivars. Based upon the biological characteristics and life table parameters, Valensia was found to be the most suitable cultivars for development and reproduction of A. jasmini.

کلیدواژه‌ها [English]

  • Aleuroclava jasmini
  • biology
  • Sex ratio
  • life table
  • Orange cultivars

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