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Effect Of Neem Oil (Azadirachta Indica) On Some Physiological
Parameters Of Locusta Migratoria Migratoria (Linné, 1758) And Locusta
Migratoria Migratorioïdes (R. & F., 1850) (Orthoptera,
Acrididae)
Bahia Doumandji-Mitiche and Moussa Abdoulaye
National
agricultural Institute, El-Harrach, Algeria
E-mail: doumandjimitiche@yahoo.fr
Abstract
Neem oil extracted from Azadirachta indica was tested in laboratory on
some physiological parameters of Locusta migratoria migratoria and
Locusta migratoria migratorioïdes (Orthoptera: Acididae). Five days after
treatment, haemocyts count of larvae's and adults was significantly reduced
compared to the control. The treated insects showed a low count of the two
haemocyt categories identified (prohaemocyt and plasmatocyt). Total haemocyts
count for untreated larvae's was 406.33 haemocyts/µl, whereas treated larvae
showed 281.33 haemocyts/µl for Locusta migratoria migratoria. Haemolymph
and cuticular proteins were also significantly reduced in treated insects of the
two species. Some of the neem oil treated adults showed slow down of heart pulse
and respiratory rhythm. Results of these assays will be reported in the
congress.
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