Saad, A., Saad, H. (2024). Effectiveness of Different Infestation Levels by Aphis nerii on the Internal Components of Usher Milkweed, Calotropis procera cactus. Journal of Plant Protection and Pathology, 15(1), 1-4. doi: 10.21608/jppp.2023.239012.1182
Abla F. A. Saad; Hayam M. Saad. "Effectiveness of Different Infestation Levels by Aphis nerii on the Internal Components of Usher Milkweed, Calotropis procera cactus". Journal of Plant Protection and Pathology, 15, 1, 2024, 1-4. doi: 10.21608/jppp.2023.239012.1182
Saad, A., Saad, H. (2024). 'Effectiveness of Different Infestation Levels by Aphis nerii on the Internal Components of Usher Milkweed, Calotropis procera cactus', Journal of Plant Protection and Pathology, 15(1), pp. 1-4. doi: 10.21608/jppp.2023.239012.1182
Saad, A., Saad, H. Effectiveness of Different Infestation Levels by Aphis nerii on the Internal Components of Usher Milkweed, Calotropis procera cactus. Journal of Plant Protection and Pathology, 2024; 15(1): 1-4. doi: 10.21608/jppp.2023.239012.1182
Effectiveness of Different Infestation Levels by Aphis nerii on the Internal Components of Usher Milkweed, Calotropis procera cactus
Plant Protection Research Institute, Agricultural Research Center, Dokki, Giza, Egypt
Abstract
Experiments were carried out to evaluation effectiveness of different infestation levels by oleander aphid, Aphis nerii (Boyer) (Aphididae:Hemiptera) on quantity and quality of the internal components of important cactus-plant, Usher Milkweed Calotropis procera (Ait) (Fam:Asclepiadaceae). Experiments were carried out at two different locations; Giza and Alexandria Governorates during season 2022. Infestations by A. nerii during successive seasons were classified into three levels: low, medium and high (due-to mean population number of aphid). Internal components of cactus leaves were: cardiac-glycosides, usharin, ushardin, calotoxin, calctin, calotropagenin, trypsin, proteoclastic-enzyme alpha-calotropeol, beta-calotropeol, giganteol and iso-giganteol. Data obtained in both of two locations showed that the low infestation by A. nerii on C. procera affected on concentrations of the internal components of C. procera leaves compared-to control (healthy leaves) and medium infestation treatments had higher effect than low-infestation and control treatment. Further, high-infestation had greater effect than both of low and medium infestations. Quantity of usher Milkweed (latex) decreased in cactus-trees infested by A. nerii compared-to control in this descending order; high, medium and low infestation at both of twolocations. Concentrations (i.e. quality) of internal components of C. procera leaves significantly varied among levels of infestations including those of free-infestation level and quantity of usher Milkweed (latex) significantly differed as well.
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