Biological and histological effects of spinosad on spodoptera littoralis (bois)
Abstract: The efficiency of Spinosad was evaluated on larvae of the Egyptian. cotton leaf worm, Spodoptera littoralis (Boisd): (Lepidoptera: Noctuidae). Second instar larvae were more sensitive to Spinosad than 4"' instar larvae, as denoted by the determined LC50 which was 5.73 and 7.83 ppm for 2"° and 4°' instars, respectively. Meanwhile, LC50 was 37.15 and 43.49 ppm for the respectively mentioned instars compared to their control. The duration of treated larvae was lengthened when either instars larvae were treated as compared to their control. Furthermore, percentage of pupation was reduced than the control by 51.03 and 49.5°h when 2n" and 4`" instar larvae were treated with LC50 of Spinosad, respectively. Adult emergence was insignificantly affected as it was less than the control by 5.3 and 4.1 % to the respective mentioned treated larval instars. The number of laid eggs was insignificantly affected; however, percentage hatchability was markedly reduced. The total protein content in larvae treated as 4`" instar showed a gradual increase from 2"° and 6"' days after treatment as it was 34.79- 35.18 mg respectively, compared with 25.8 to 26.5 mg in control. The midgut tissue of 5`" instar larvae treated in the 4`" instar larvae with LC5o of Spinosad showed some alternations and several aberration in some cell organelle such mitochondria, nucleolus, microvilli and golgi apparatus as observed by light and electron microscope.
Publication year 2007
Pages 10497-10510
Availability location معهد بحوث وقاية النباتات - ش نادى الصيد - الدقى - الجيزة
Availability number
Organization Name
City المنصورة
serial title مجلة جامعة المنصورة للعلوم الزراعية
ISSN 1110-0346
Author(s) from ARC
External authors (outside ARC)
    فائزة مرعى احمد مرعى قسم وقاية النبات-كلية الزراعة جامعة عين شمس
    لطفى عبد الحميد يوسف قسم وقاية النبات-كلية الزراعة جامعة عين شمس
Agris Categories Protection of plants - General aspects
AGROVOC
TERMS		 Biological control. Nucleus. Protein content. Spodoptera littoralis.
Publication Type Journal
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