RESPONSE OF SCHISTOCERCA GREGARIA (FORSK.) TO AZADIRACHTIN EXTRACTED FROM NEEM TREE SEEDS (AZADIRACHTA INDICA A JUSS.)
EL-GAMMAL, A. (1994). RESPONSE OF SCHISTOCERCA GREGARIA (FORSK.) TO AZADIRACHTIN EXTRACTED FROM NEEM TREE SEEDS (AZADIRACHTA INDICA A JUSS.). EKB Journal Management System, 72(2), 393-399. doi: 10.21608/ejar.1994.450646
ABDEL-AZIM M. EL-GAMMAL. "RESPONSE OF SCHISTOCERCA GREGARIA (FORSK.) TO AZADIRACHTIN EXTRACTED FROM NEEM TREE SEEDS (AZADIRACHTA INDICA A JUSS.)". EKB Journal Management System, 72, 2, 1994, 393-399. doi: 10.21608/ejar.1994.450646
EL-GAMMAL, A. (1994). 'RESPONSE OF SCHISTOCERCA GREGARIA (FORSK.) TO AZADIRACHTIN EXTRACTED FROM NEEM TREE SEEDS (AZADIRACHTA INDICA A JUSS.)', EKB Journal Management System, 72(2), pp. 393-399. doi: 10.21608/ejar.1994.450646
EL-GAMMAL, A. RESPONSE OF SCHISTOCERCA GREGARIA (FORSK.) TO AZADIRACHTIN EXTRACTED FROM NEEM TREE SEEDS (AZADIRACHTA INDICA A JUSS.). EKB Journal Management System, 1994; 72(2): 393-399. doi: 10.21608/ejar.1994.450646

RESPONSE OF SCHISTOCERCA GREGARIA (FORSK.) TO AZADIRACHTIN EXTRACTED FROM NEEM TREE SEEDS (AZADIRACHTA INDICA A JUSS.)

Egyptian Journal of Agricultural Research
Volume 72, Issue 2, June 1994, Pages 393-399    PDF (1.66 M)
Document Type: Original Article
DOI: 10.21608/ejar.1994.450646
Author
ABDEL-AZIM M. EL-GAMMAL
Plant Protection Research Institute, Agricultural Research Centre, Dokki, Giza, Egypt
Abstract
The antifeedant action of Azadirachtin as well as its biological ef‌fects against the nymphal and adult stages of the desert locust, Schis‌tocerca gregaria were studied. Low concentrations of this compound ( 20, 2 and 1 ppm ) exhib‌ited strong antifeedant action against the 4th and 5th instars and the adult stage of this insect. These concentrations induced 100, 60 and 40% feeding reduction against the 4th instar ; 100, 75, and 72.5% feeding reduction against the 5th instar ; and 100, 50 and 18.75 % feeding reduction against the adult stage respectively. Using injection technique, azadirachtin had a hormone- like effect against the last nymphal instars such as expressed by high failure in ec‌dysis, prolongation in the 4th and 5th stadium and permanent nymphs.
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