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Toxicological and biological studies of certain plant extracts on aphis gossypii glover [electronic resource].

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Hegazy, H. Wafaa

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Language: English Summary language: Arabic Description: p.705-716Other title:

دراسات تكسولوجية وبيولوجية لبعض المستخلصات النباتية على حشرة المن [Added title page title]

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Journal of agricultural research Tanta University, 2006 v.32 (3) [electronic resource].

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In: Journal of Agricultural Research Tanta Univeristy 2006.v.32(3)Summary: The present study was directed to evaluate the residual effect of two plant extracts (black cumin and wormseed) on the cotton aphid, Aphis gossypii (Glover). Results indicated that the black cumin, as a plant extract was more toxic to adults of Aphis gossypii than wormseed with LC₅₀ values (140.42 and 1704 ppm.) respectively. The duration of different instars was longer than that of the untreated ones. Black cumin significantly increased the duration period of the first instar while no significant difference was found between wormseed and control Plant extracts decreased the number of uymphs than the control (1.67 and 2.67 nymphs per individual for black cumin and wormseed respectively), while control showed 5.00 nymphs/individual. The total mortality was 60.01 and 40% during instars treated with black cumin and wormseed respectively. The duration of offsp\"ing was significantly decreased to 2.33 and 3.33 days for treated indh'iduals with black cumin and wormseed compared with 5.67 days for the control. The results proved that black cumin was more effective extract on duration of offspring duration of Aphis gossipii.

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The present study was directed to evaluate the residual effect of two plant extracts (black cumin and wormseed) on the cotton aphid, Aphis gossypii (Glover). Results indicated that the black cumin, as a plant extract was more toxic to adults of Aphis gossypii than wormseed with LC₅₀ values (140.42 and 1704 ppm.) respectively. The duration of different instars was longer than that of the untreated ones. Black cumin significantly increased the duration period of the first instar while no significant difference was found between wormseed and control Plant extracts decreased the number of uymphs than the control (1.67 and 2.67 nymphs per individual for black cumin and wormseed respectively), while control showed 5.00 nymphs/individual. The total mortality was 60.01 and 40% during instars treated with black cumin and wormseed respectively. The duration of offsp\"ing was significantly decreased to 2.33 and 3.33 days for treated indh'iduals with black cumin and wormseed compared with 5.67 days for the control. The results proved that black cumin was more effective extract on duration of offspring duration of Aphis gossipii.

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