Abstract
This study was carried out to study the effect of infested rose plants by Icerya aegyptiaca (Douglas)(Margarodidae : Homoptera).(in different stages of infestation) on the physiological and natural characteristics of rose oil at two locations (governorates), International Garden (Cairo Governorate) and El-Orman Garden, (Giza Governorate) under glasshouse conditions during successive seasons 2018. Data obtained showed that the most important components of rose oil such as (geraniol, citronellol, nerol, stearpoten, phenyl ethanol and bioflavonoids), acids such as Citric acid and Malic acid and vitamins such as vitamin A, B, C and vitamin D were changed its concentrations as result of infestation by I. aegyptiaca. And high infestation by I. aegyptiaca affected concentrations of these components more than medium and low infestation, respectively compared to control. In addition, data obtained showed that the most natural characteristics of rose oil such as volatility, light rotation and refraction value were changed as a result of infestation by I. aegyptiaca but other natural characteristics like freezing point did not change after infestation by I. aegyptiaca. And high infestation by I. aegyptiaca affected the natural characteristics of rose oil more than medium and low infestation, respectively compared to control.
Highlights
This study was carried out to study effect of infested rose plants by I. aegyptiaca on the physiological and natural characteristics of rose oil at two locations, International Garden (Cairo Governorate) and El-Orman Garden, (Giza Governorate) under glasshouse conditions during successive seasons 2018 this study divided into two parts, first part study the population fluctuations of I. aegyptiaca during successive season 2018 on three varieties of rose, and the second part included effect of insect infestation by I. aegyptiaca on the physiological and natural characteristics of rose oil
The second part included the effect of infested rose plants by I. aegyptiaca on the physiological and natural characteristics of rose oil
Population fluctuations of I. aegyptiaca on Rose Plants during 2018 Season: Data tabulated in table (1) show that the infestation by I. aegyptiaca adults began to appear in Carmen variety on rose plants on the 1st February with 7.9 adults/plant, the infestation increased gradually to reach 24.8 adults/plant on the mid of April the infestation decreased until reached to 3.7 adults/plant on mid of August
Summary
Data obtained showed that the most important components of rose natural oil such as (geraniol, citronellol, nerol, stearpoten, phenyl ethanol and characteristics, rose bioflavonoids), acids such as Citric acid and Malic acid and vitamins such oil, Giza Governorate as vitamin A, B, C and vitamin D were changed its concentrations as result of infestation by I. aegyptiaca. Aegyptiaca affected the natural characteristics of rose oil more than medium and low infestation, respectively compared to control.
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