Response of Susceptible Laboratory and Resistant Field Strains of Spodoptera littoralis (Lepidoptera: Noctuidae) to Teflubenzuron

1990 ◽  
Vol 83 (1) ◽  
pp. 59-62 ◽  
Author(s):  
I. Ishaa Ya ◽  
M. Klein
Keyword(s):  
Spodoptera Littoralis ◽  
Lepidoptera Noctuidae

scholarly journals Toxicity and sublethal effects of chlorantraniliprole and indoxacarb on Spodoptera littoralis (Lepidoptera: Noctuidae)

2021 ◽  
Author(s):  
Moataz A. M. Moustafa ◽  
Eman A. Fouad ◽  
Yasmin Abdel-Mobdy ◽  
Kamirán Áron Hamow ◽  
Zsanett Mikó ◽  
...  
Keyword(s):  
Spodoptera Littoralis ◽  
Sublethal Effects ◽  
Lepidoptera Noctuidae

scholarly journals Efficacy of the parasitoid, Trichogrammatoidea bactrae Nagaraja (Hymenoptera: Trichogrammatidae) on the cotton leafworm, Spodoptera littoralis (Boisd.) (Lepidoptera: Noctuidae) egg masses

2021 ◽  
Vol 31 (1) ◽  
Author(s):  
Hend O. Mohamed
Keyword(s):  
Spodoptera Littoralis ◽  
Insect Pests ◽  
Single Layer ◽  
Control Agent ◽  
Physical Characteristics ◽  
Great Ability ◽  
Egg Masses ◽  
Cotton Leafworm ◽  
Lepidoptera Noctuidae ◽  
Trichogrammatoidea Bactrae

Abstract Background The Egyptian cotton leafworm, Spodoptera littoralis (Boisd.) (Lepidoptera: Noctuidae) is one of the major insect pests, causing a significant damage on different cultivated agricultural crops. Developing an alternative non-chemical tool, an effective and environmentally friendly method to suppress pest's infestation is essentially needed. Therefore, biological control by releasing the egg parasitoids could be the most promising tool for integrated pest management. Results This study was designed to evaluate the efficacy of the egg parasitoid, Trichogrammatoidea bactrae Nagaraja (Hymenoptera: Trichogrammatidae) as a bio-control agent against S. littoralis egg masses with different physical characteristics (number of egg layer and degree of scale density) in a no-choice and choice tests, under laboratory conditions. Also, the parasitoids’ fitness in terms of parasitism percentage, developmental period, adults’ emergence percentage, female offspring percentage, and longevity were investigated. The results revealed that T. bactrae wasps had a great ability to parasitize S. littoralis egg masses, but with different rates, related to their layers and scales’ thickness in both tests. The highest parasitism percentage was observed on one-layer eggs, followed by two layers. However, 3-layer eggs were the least preferable one. High numbers of adult emergencies (> 80%) were observed in all tested egg masses, except in the case of 3 layers with high scales. Furthermore, female-biased sex ratios were noticed at all examined eggs, with only the exception of high-scaly eggs with a single layer that recorded the lowest rate (≤ 45%). Besides, the survival of adult female parasitoids was not significantly affected in both tests. Conclusions T. bactrae could be used as a bio-control agent against S. littoralis egg masses with different physical characteristics based on the achieved results.

Characterization of the Δ11-palmitoyl-CoA-desaturase from Spodoptera littoralis (lepidoptera: noctuidae)

1992 ◽  
Vol 22 (2) ◽  
pp. 143-148 ◽  
Author(s):  
Ferran Rodriguez ◽  
David L. Hallahan ◽  
John A. Pickett ◽  
Francisco Camps
Keyword(s):  
Spodoptera Littoralis ◽  
Lepidoptera Noctuidae

Diurnal rhythm in expression and release of yolk protein in the testis of Spodoptera littoralis (Lepidoptera: Noctuidae)

2011 ◽  
Vol 41 (4) ◽  
pp. 264-272 ◽  
Author(s):  
Joanna Kotwica ◽  
Ewa Joachimiak ◽  
Marta A. Polanska ◽  
Magdalena M. Majewska ◽  
Jadwiga M. Giebultowicz ◽  
...  
Keyword(s):  
Diurnal Rhythm ◽  
Spodoptera Littoralis ◽  
Yolk Protein ◽  
Lepidoptera Noctuidae

scholarly journals دراسة بعض الجوانب الحياتية لدودة ورق القطن Spodoptera littoralis (Boisd.) Lepidoptera: Noctuidae

2017 ◽  
Vol 11 (2) ◽  
pp. 35-40
Author(s):  
Feryal صادق ◽  
حسام الحلفي
Keyword(s):  
Spodoptera Littoralis ◽  
Lepidoptera Noctuidae

 تعد حشرة ورق القطن Sopdoptera littoralis (Biosd ) من الحشرات الاقتصادية المهمة التي تسبب ضرراً لمحاصيل العائلة الباذنجانية في العراق في الآونة الأخيره إذ تهاجم البادرات, الأوراق, الأزهار والثمار وبالتالي تسبب خسائر إقتصادية في الانتاج  درست دورة حياة الحشره تحت أربع درجات حرارية مختلفة هي 15,20,25,30م  أوضحت نتائج التجارب المختبرية ان معدلات التطور لمختلف مراحل حياة الحشرة  تتناسب عكسياً مع درجة الحرارة. سجل أعلى معدل لمدة تطور البيض, الدور اليرقي،  ما قبل العذراء, الدور العذري, مدة دورة الحياة إذ بلغت 10.67, 34.16 ,4.0,22,3 و71.13 يوماً على التوالي عند درجة 20مͦ فيما كانت اقل معدل  لمدة تطور البيض , الدور اليرقي. الدور ما قبل العذراء, الدور العذري والمده من البيضة الى البالغة عند درجة حرارة 30مͦ  اذ بلغت  3.2 , 15.56 ,1.1 ,8.36 و 28.22  يوماً على التوالي, استبعدت درجة حراره 15م  لعدم حصول نمو وتطور  لليرقة.

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