Effect of the Insect Infestation by Thrips simplex and Macrosiphum rosae on the Morphological Characteristics of Gladiolus Flowers Under Plastic Greenhouses

Document Type : Original Article


Plant Protection Research Institute, A.R.C., Dokki, Giza, 12618 Egypt


This study was carried out to study the effect of the insect infestation by Gladiolus Thrips, Thrips simplex (Morison) (Thysanoptera: Thripidae) and The Rose Aphid,Macrosiphum rosae L. (Hemiptera: Aphididae) on the morphological characteristics of gladiolus flowers (Fam.: Iridaceae). This study was carried out at two locations (governorates), Al-Orman Garden (Giza Governorate) and Antoniadis Garden (Alexandria Governorate) during season 2021 under plastic greenhouses. Some morphological characteristics were studied such as color of the flower, number of the petals per flower, length of the flower diameter, weight of the flower, the stem length, the vase life period (flowers life after picking) and the annual production for flowers.
             Results obtained showed that the infestation by thrips and aphids affected on all morphological characteristics of gladiolus flowers except the color of the flower. And data obtained showed also that the effect of the infestation by aphids was higher than the effect ofthrips compared to control (flowers did not infest by any insects).