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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Claims 6
Claim · model-written summary
Low Aphis nerii infestation affected leaf component concentrations versus healthy leaves.
- Taxon
- C. procera
.jpg?width=60)
Calotropis procerae0 - Treatment
- low infestation by A. neriie0
- Interactor
- A. nerii
Aphis neriie0pest - Outcome
- concentrations of the internal components of C. procera leavese0
- Direction
- affectede0
- Comparator
- control (healthy leaves)e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
.jpg?width=500)
Verbatim
e0“low infestation by A. nerii on C. procera affected on concentrations of the internal components of C. procera leaves compared-to control (healthy leaves)”
Claim · model-written summary
Medium infestation had a greater effect on leaf components than low infestation and control.
- Taxon
- C. proceraCalotropis procerae1
- Treatment
- medium infestation treatmentse0
- Outcome
- internal components of C. procera leavese1
- Direction
- higher effecte0
- Comparator
- low-infestation and control treatmente0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“medium infestation treatments had higher effect than low-infestation and control treatment”
e1“on concentrations of the internal components of C. procera leaves compared-to control”
Claim · model-written summary
High infestation had a greater effect on leaf components than medium and low infestation.
- Taxon
- C. proceraCalotropis procerae1
- Treatment
- high-infestatione0
- Outcome
- internal components of C. procera leavese1
- Direction
- greater effecte0
- Comparator
- low and medium infestationse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“high-infestation had greater effect than both of low and medium infestations”
e1“on concentrations of the internal components of C. procera leaves compared-to control”
Claim · model-written summary
Aphis nerii infestation decreased Calotropis latex quantity relative to control, greatest at high infestation.
- Taxon
- Calotropis proceraCalotropis procerat0
- Treatment
- infested by A. neriie0
- Interactor
- A. neriiAphis neriie0pest
- Outcome
- Quantity of usher Milkweed (latex)e0
- Direction
- decreasede0
- Qualifier
- high, medium and low infestatione0
- Comparator
- controle0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“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”
t0“Calotropis procera”
Claim · model-written summary
Leaf component concentrations varied significantly among infestation levels.
- Taxon
- C. proceraCalotropis procerae0
- Treatment
- levels of infestationse0
- Outcome
- Concentrations (i.e. quality) of internal components of C. procera leavese0
- Direction
- variede0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Concentrations (i.e. quality) of internal components of C. procera leaves significantly varied among levels of infestations including those of free-infestation level”
Claim · model-written summary
Calotropis latex quantity differed significantly among infestation levels.
- Taxon
- C. proceraCalotropis procerae1
- Treatment
- levels of infestationse1
- Outcome
- quantity of usher Milkweed (latex)e0
- Direction
- differede0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“quantity of usher Milkweed (latex) significantly differed as well”
e1“C. procera leaves significantly varied among levels of infestations”