Abstract :
Experiments were carried out to study the effect of rose (Rosa gallica) flowers color on the infestation of adults and nymphs of the rose aphid, Macrosiphum rosae (Linnaeus), (Aphididae, Hemeptera). Using five varieties of rose similar in the horticulture characters but different in the flowers color only. Carmen (red), Virginia (white), Freedom (yellow), Queen (blue) and Dream (pink) Experiments were done in two locations El-Orman Garden, Giza Governorate and International Garden, Cairo Governorate throughout 2015season. In both Governorates (Giza and Cairo), the infestation with the rose aphid adults began to appear on the 1st February and recorded the activity peak during April then decreased until beginning of August. The flowers color of R. gallica may arrange for attracted the rose aphid adults, as follow: yellow, red, blue, pink and white, respectively. Statistical analysis showed that highly significant differences between the five flowers color (varieties) of R. gallica on the attraction of adults of the rose aphid, M. rosae. In the same trend, the infestation with the rose aphid nymphs began to appear on February and increase gradually lasting to the first pike in April, then the population began decreased until beginning of August. It can be arranging the flowers color of R. gallica for attract of the rose aphid (nymphs) as follows: yellow, red, blue, pink and white. Statistical analysis showed that highly significant differences between the five flowers color (varieties) of R. gallica on the attraction of M. rosae nymphs.
