EFFECT OF ROYAL JELLY AND HONEYDEW, ITS CONCENTRATIONS AND TREATMENT METHOD OF Aphis fabae Scolopi ON PREDATION EFFICIENCY OF THE LARVAL INSTARS OF Coccinella septempunctata L
2010
The feeding of the ladybird beetle Coccinella septempunctata L. on the black bean aphid Aphis fabae Scolopi which is treated directly and indirectly with three concentrations (2,4,8%) of royal jelly of the bee and the honeydew which excreted by the aphid Pterochlorus persicae (Chold.). The results of this study revealed that the direct treatment of the black bean aphid by the 8% of royal jelly exhibited a superior effects in comparison with honeydew on the means of the daily predation efficiency for the four larval instars which reached 6.33, 18.57, 28.55 and 29.47 aphid / larvae respectively as compared with 3.90, 12.42, 18.37 and 20.98 aphid/larvae for the 1st, 2nd, 3rd, and 4th larval instars respectively for the control treatment and also on the mean percentage of predation efficiency which reached 63.33, 92.83, 95.17, and 98.25% for the larval instars respectively, and 39.00, 62.08, 61.11 and 69.92% for the four larval instars respectively in control, while the mean percentage of increase or decrease in daily predation efficiency reached 63.42, 49.95, 55.56 and 40.64% for the 1st, 2nd, 3rd, and 4th larval instars respectively.
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