Biochemical and Physiological Effects of Lufenuron and Chlorfluazuron on Spodoptera littoralis (Boisd.) (Lepidoptera: Noctuidae)

Taleb, Hamdy K. Abou; Zahran, Hossam El-Din M.; Gad, Abir A.

doi:10.3923/je.2015.77.86

Cited by 15 publications

(2 citation statements)

References 12 publications

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“…Also, four types had been distinguished in the larval haemolymph of the same insect by some researchers (Harpaz and Zelcer, 1969;Gelbič et al, 2006;Asiri, 2017). On the other hand, our result consistently agreed with the reported five types of circulating hemocytes in last instar larvae of the same insect by many authors (Zohry, 2006;Hassan et al, 2013;Shaurub et al, 2014;Abou-Taleb et al, 2015).…”

Section: Identification Of Circulating Hemocyte Types In S Littoralissupporting

confidence: 93%

Disruptive Effects of Certain Chitin Synthesis Inhibitors on Some Haemogram Parameters in the Egyptian Cotton Leafworm, Spodoptera littoralis (Lepidoptera: Noctuidae)

Basiouny

Waheeb

2019

Egyptian Academic Journal of Biological Sciences. A, Entomology

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The Egyptian cotton leafworm, Spodoptera littoralis, is a key pest attacking several economically important crops in Egypt and several parts in the world. The objective of the present study was to investigate the effects of novaluron and cyromazine, chitin synthesis inhibitors, on the larval haemogram of this pest. Five main types of the circulating hemocytes, viz., plasmatocytes (PLs), granulocytes (GRs), prohemocytes (PRs), oenocytoides (OEs), and spherulocytes (SPs) had been categorized in last instar larvae. The most important differentiating characters of each type were described. After treatment of the freshly moulted penultimate instar larvae with LC50 of novaluron or cyromazine (2.71 and 74.44 ppm, respectively), the successfully moulted last (6th) instar larvae were used to assess the haemogram responses. Novaluron remarkably induced the total hemocyte counts (THCs) at two limits of the larval instar. In contrast, cyromazine exhibited a general inhibitory effect on THC during the majority of larval instar. As a response to novaluron treatment, PRs and PLs counts had been slightly induced during the first half of instar but slightly reduced during the second half. Also, GRs population decreased but SPs population increased along most larval period. With respect to the effect of cyromazine, count of PRs and GRs had been remarkably inhibited but PLs was significantly enhanced along the larval life. The same compound exhibited diverse effects on SPs, depending on the larval age. In addition, OEs count was enhanced by both compounds during the second half of larval instar. Both compounds exhibited serious cytopathological effects on all types of hemocytes, except cyromazine against OEs. INTRODUCTION In insects, the circulating haemocytes perform primary functions in the body, such as phagocytosis, coagulation to prevent loss of blood, encapsulation of foreign bodies, nodule formation, detoxification of metabolites and biological active materials, as well as storage and distribution of nutritive materials to various tissues (for detail, see:

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Section: Identification Of Circulating Hemocyte Types In S Littoralissupporting

confidence: 93%

Disruptive Effects of Certain Chitin Synthesis Inhibitors on Some Haemogram Parameters in the Egyptian Cotton Leafworm, Spodoptera littoralis (Lepidoptera: Noctuidae)

Basiouny

Waheeb

2019

Egyptian Academic Journal of Biological Sciences. A, Entomology

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“…Other researchers identified different four types of hemocyte, such as PLs, GRs, SPs and OEs (Gelbič et al, 2006); PLs, GRs, PRs and SPs (Abd El-Aziz, 2015) or PLs, GRs, PRs and OEs (Asiri, 2017). On the other hand, many authors (Zohry, 2006;Hassan et al, 2013;Shaurub et al, 2014;Ghoneim et al, 2015a;Abou-Taleb et al, 2015) reported five types of the circulating hemocytes in last (6 th ) instar larvae.…”

Section: Variable Hemocytes In Selected Economic Insectsmentioning

confidence: 99%

Characterization of Qualitative and Quantitative Haemogram Parameters in Insects: Current Concepts and Future Prospects.

Ghoneim

2019

Egyptian Academic Journal of Biological Sciences. A, Entomology

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physiological functions, as previously mentioned. 2.1. Variation in Number and Types of Circulating Hemocytes: It is interesting to give some historical information about the hemocyte classification and characterization. Hollande (1911) firstly attempted to classify and categorize the insect hemocytes after the earlier research works, particularly those of Cuenot (1897) and Kollmann (1908). Then, Wigglesworth (1939) followed each of Hollande's categories. Yeager (1945) identified ten hemocyte classes containing 32 different types in the Southern armyworm Prodenia eridania. Some years later, Jones (1962) reduced this number to nine distinct cell types, and his generalizing work earned a special place in the history of hemocytes, since his classification was the basis used by most researchers thereafter. The same author described eight hemocyte types in insects: PRs, PLs, GRs, Cystocytes (CCs), OEs, ADs, Podocytes (POs), and Vermiform cells (VRs). With this classification, this author established a system to give an order to more than 70 names for hemocyte types used by earlier investigators. Later, Price and Ratcliffe (1974) examined the hemocytes of 15 representative insect orders and distinguished six different types distributed in those orders: PRs, PLs, GRs, spherulocytes (SPs), CCs and OEs; however, CCs were absent in Lepidoptera. Using phase contrast microscopy, Sharma and Dutta (1979) recorded the presence of ten categories of hemocytes: PRs, PLs, GRs, CCs, COs, SPs, ADs, OEs, POs and VRs in the grasshoppers Chrotogonus trachypterus and Acrida exaltata. Although, Gupta (1979) recognized seven main types of haemocytes in various insect orders, namely PRs, PLs, GRs, SPs, ADs, OEs and Coagulocytes (CGs), while Gupta (1994) merged the category CGs with that of GRs. Although Brehelin and Zachary (1986) proposed a new system with nine hemocyte types, the classified categories of haemocytes ranged, generally, from four to seven (Gupta, 1979) or between three and nine (Wigglesworth, 1959; Arnold, 1972, 1974). However, some authors described three to eight hemocyte types in several insect orders by means of the transmission electron microscopy (TEM)(Ratcliffe and Rowley, 1979; Al-Khalifa and Siddiqui, 1985). As reported in the available literature, the main types of hemocytes are PRs, GRs, PLs, SPs and OEs. These hemocyte types have been described in insect species of diverse orders,

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Influence of lufenuron on the nutrient content and detoxification enzyme expression in Aedes aegypti L. (Diptera: Culicidae)

Panmei

Samal

Lanbiliu

et al. 2021

Int J Trop Insect Sci

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Biochemical and Physiological Effects of Lufenuron and Chlorfluazuron on Spodoptera littoralis (Boisd.) (Lepidoptera: Noctuidae)

Cited by 15 publications

References 12 publications

Disruptive Effects of Certain Chitin Synthesis Inhibitors on Some Haemogram Parameters in the Egyptian Cotton Leafworm, Spodoptera littoralis (Lepidoptera: Noctuidae)

Disruptive Effects of Certain Chitin Synthesis Inhibitors on Some Haemogram Parameters in the Egyptian Cotton Leafworm, Spodoptera littoralis (Lepidoptera: Noctuidae)

Characterization of Qualitative and Quantitative Haemogram Parameters in Insects: Current Concepts and Future Prospects.

Influence of lufenuron on the nutrient content and detoxification enzyme expression in Aedes aegypti L. (Diptera: Culicidae)

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