ارزیابی تاثیر مرحله رشدی طعمه بر واکنش عددی کفشدوزک شپشک‌خوار Nephus arcuatus Kapur

نوع مقاله: مقاله پژوهشی

نویسندگان

1 گروه گیاه‌پزشکی، دانشکده کشاورزی، دانشگاه کشاورزی ومنابع طبیعی رامین خوزستان

2 گروه گیاه‌پزشکی، دانشکده کشاورزی، دانشگاه شهید چمران اهواز

چکیده

در این پژوهش تاثیر مرحله رشدی بر واکنش عددی ماده بالغ کفشدوزک  Nephus arcuatus Kapur نسبت به تراکم­ های مختلف شپشک آردآلود جنوب Nipaecoccus viridis Newstead (شامل پوره ­های سن یک، دو، سه و ماده بالغ شپشک) مورد بررسی قرار گرفت. تراکم­ ها­ی طعمه شامل 2، 4، 8، 16، 50، 70، 90، 110 و 130 پوره سن یک، 2، 4، 6، 10، 20، 30، 40 و 50 سن دو، 2، 4، 6، 9، 15، 21 و 27 سن سه و 1، 3، 5، 7 و 9 ماده بالغ شپشک طی 24 ساعت در اختیار ماده بالغ جفت­گیری­ کرده 10 روزه قرار گرفت. تراکم ­های ارائه شده بر اساس مرحله رشدی طعمه متغیر بودند. بر اساس نتایج، با افزایش تراکم طعمه تعداد تخم گذاشته ‌شده توسط ماده بالغ کفشدوزک در هر چهار طعمه ارائه‌ شده به طور غیر خطی افزایش یافت. مقایسه آماری مقدار تخم تولیدشده توسط ماده بالغ کفشدوزک در بیشترین تراکم چهار طعمه­ ارائه‌شده نشان داد که ماده­ ها بیشترین تخم را با تغذیه از طعمه­ کوچک‌تر، پوره سن یک (2/1±5/8) و کمترین تخم را بدون اختلاف معنی دار با تغذیه از طعمه ­های بزرگ‌تر شامل پوره سن دو (7/0±2/5)، پوره سن سه (8/0±9/5) و ماده بالغ (7/0±7/4) شپشک تولید می­ کنند (0002/0P=). مطابق با نتایج به­ دست آمده، مرحله رشدی طعمه عامل تعیین کننده­ای در نوع واکنش عددی ماده بالغ کفشدوزک N. arcuatus است.  

کلیدواژه‌ها


عنوان مقاله [English]

Effect of prey stages on numerical response of Nephus arcuatus Kapur

نویسندگان [English]

  • L. Ramezani 1
  • S. Zarghami 2
1 Department of Plant Protection, Faculty of Agriculture, Ramin Agriculture and Natural Resources University of Khuzestan, Ahvaz. Iran
2 Department of Plant Protection, Faculty of Agriculture, Shahid Chamran University, Ahvaz, Iran.
چکیده [English]

This study examined the effects of prey stages on numerical reponses of Nephus arcuatusat different densities of four different sizes of Nipaecoccus viridis (four different stages including: the 1st, 2nd and 3rd instar nymphs and adult females of N. viridis). The densities of 2, 4, 8, 16, 50, 70, 90, 110 and 130 of 1stinstar nymphs, 2, 4, 6, 10, 20, 30, 40 and 50 of 2nd instar nymphs, 2, 4, 6, 9, 15, 21 27 of 3rd instar nymphs and 1, 3, 5, 7, 9 of adult females of prey were considered as prey and introduced to mated female (10 day- old) during 24h. The results indicated that the number of eggs laid per female were nonlinearly increased with increasing prey density in all four prey stages. Comparisons of means eggs laid by females at highest densities of each prey indicated that females laid the highest number of eggs when exposed to small prey, 1st instar nymph (8.5± 1.2) and lowest eggs on 2nd instar (5.2±0.7), 3rd instar nymphs (5.9±0.8) and as well as adult females (4.7±0.7) with  significant differences (P=0.0002). These findings showed that the numerical response of N. arcuatus is affected by different stage of N. viridis.

کلیدواژه‌ها [English]

  • prey stage
  • numerical response
  • Nephus arcuatus
  • Nipaecoccus viridis
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