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