DEVELOPMENTAL AND MORPHOGENIC RESPONSES OF SCHISTOCERCA GREGARIA (ORTHOPTERA: ACRIDIDAE) TO THE JUVENOID PYRIPROXYFEN (S- 31183).
GHONEIM, K., AL-DALI, A., BAKR, R., TANANI, M., BREAM, A. (2007). DEVELOPMENTAL AND MORPHOGENIC RESPONSES OF SCHISTOCERCA GREGARIA (ORTHOPTERA: ACRIDIDAE) TO THE JUVENOID PYRIPROXYFEN (S- 31183).. EKB Journal Management System, 18(Issue 2-C), 59-81. doi: 10.21608/absb.2007.11610
K. S. GHONEIM; A. G. AL-DALI; R. F. BAKR; M. A. TANANI; A. S. BREAM. "DEVELOPMENTAL AND MORPHOGENIC RESPONSES OF SCHISTOCERCA GREGARIA (ORTHOPTERA: ACRIDIDAE) TO THE JUVENOID PYRIPROXYFEN (S- 31183).". EKB Journal Management System, 18, Issue 2-C, 2007, 59-81. doi: 10.21608/absb.2007.11610
GHONEIM, K., AL-DALI, A., BAKR, R., TANANI, M., BREAM, A. (2007). 'DEVELOPMENTAL AND MORPHOGENIC RESPONSES OF SCHISTOCERCA GREGARIA (ORTHOPTERA: ACRIDIDAE) TO THE JUVENOID PYRIPROXYFEN (S- 31183).', EKB Journal Management System, 18(Issue 2-C), pp. 59-81. doi: 10.21608/absb.2007.11610
GHONEIM, K., AL-DALI, A., BAKR, R., TANANI, M., BREAM, A. DEVELOPMENTAL AND MORPHOGENIC RESPONSES OF SCHISTOCERCA GREGARIA (ORTHOPTERA: ACRIDIDAE) TO THE JUVENOID PYRIPROXYFEN (S- 31183).. EKB Journal Management System, 2007; 18(Issue 2-C): 59-81. doi: 10.21608/absb.2007.11610

DEVELOPMENTAL AND MORPHOGENIC RESPONSES OF SCHISTOCERCA GREGARIA (ORTHOPTERA: ACRIDIDAE) TO THE JUVENOID PYRIPROXYFEN (S- 31183).

Al-Azhar Bulletin of Science
Article 1, Volume 18, Issue 2-C, December 2007, Page 59-81  XML PDF (1.17 MB)
Document Type: Original Article
DOI: 10.21608/absb.2007.11610
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Authors
K. S. GHONEIM email 1; A. G. AL-DALI1; R. F. BAKR2; M. A. TANANI1; A. S. BREAM1
1Department of Zoology. Faculty of Science. Al-Azhar University.
2Department of Entomology, Faculty of Science, Ain Shams University, Cairo, Egypt.
Abstract
To investigate the effects of Pyriproxyfen (S-31183) on the growth, development and morphogenesis of the desert locust Schislocerca gregaria, five concentration levels (1000, 500, 250, 125 and 62.5 ppm) were given through the fresh clover leaves as food to nymphs of three developmental ages: newly moulted penultimate (4th) instar, newly moulted last (5th) instar and late-aged last in star. All results were obtained 24 h after feeding.
Pyriproxyfen exhibited a remarkable inhibitory effect on the nymphal growth and consequently nymphs were prevented to obtain more than one-third of weight gain of control congeners at the highest concentration level. Also, the developmental rate was increasingly depressed as the concentration level was increased, almost, in all treatments. The controls had the fastest developmental rate among all nymphs.
The adult females were hindered to emerge proprtionally to the increasing concentration level of Pyriproxyfen. Moreover, some adults were completely prevented to emerge after treatment of the penultimate instar nymphs with the highest concentration level. In addition, Pyriproxyfen exerted a profound action on the adult morphogenesis. The degree of adult deformation was dose-dependent after treatment of the newly moulted 4th or 5th instar nymphs. After treatment of these nymphs, also, the adult longevity was elaborately shortened while the treatment of late-aged 5th instar nymphs resulted in an insignificant prolongation of the adult longevity.
Keywords
Schistocerca gregaria; Pyriproxyfen; Growth; Development; metamorphosis; morphogenesis; emergence; longevity
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