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[9000689.] رقم البحث : 9000689 - |
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Effect of azadirachtin on the consumption and utilization of food in some early larval instars of spodoptera littoralis (boisd.). / |
| تخصص البحث : General |
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Agricultural Research Journal Suez Canal University / / Volume 2 - 2003 |
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A.S. Bream |
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H.A.Mohamed |
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K.S. Ghoneim |
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NeemAzal - Food metabolism - Spodoptera littoralis |
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The azadirachtin preparation, NeemAzal, was assessed against the Egyptian cotton leafworm Spodoptera littoralis to clarify its possible action on the food metabolism. Six concentration levels were prepared: 1250, 625, 312, 100, 50, and 10 ppm, and given to 2nd instar larvae with the food (Castor leaves). All metabolic parameters were estimated during the 2nd and 4th larval instars. A detrimental effect on the food consumption of 2nd instar larvae was found, irrespective of the NeemAzal concentration level. Almost all estimated metabolic parameters were less than those of control larvae and decreased as the conc. level was increased. Similarly, food cosumption of 4th instar larvae clarified a strong action of NeemAzal. |
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