Abstract
This study was carried out to study the effect of Chrysanthemum flowers color on the infestation with Chrysanthemum aphid, Macrosiphoniella sanborni (Gillette) (Aphididae, Hemiptera) under glasshouse conditions. Using six colors (varieties) of Chrysanthemum plants similar in the horticulture characters but different in the flowers color only (yellow, green, red, orange, violet and white). Experiments were done in two locations (governorates) Giza Governorate and Qaluobiya Governorate under glasshouse conditions throughout 2017 season. Obtained results showed that were a convergence of results at both the two locations (governorates), also at both adults of M. sanborni and its nymphs. Whereas the percentage of infestation by adults in Giza Governorate at the six colors of chrysanthemum flowers (yellow, green, red, orange, violet and white) were 24.5, 20.8, 17.6, 14.6, 12.5 and 9.8%, respectively. While the percentage of infestation by nymphs in the same governorate at the six colors were 23.9, 21.2, 17.9, 15.4, 12.4 and 9.1%, respectively. As the same trend, in Qaluobiya Governorate whereas the percentage of infestation by adults at the six colors of chrysanthemum flowers (yellow, green, red, orange, violet and white) were 24.6, 21.7, 18.3, 14.8, 12.0 and 8.5%, respectively. While the percentage of infestation by nymphs in the same governorate at the six colors were 24.5, 21.7, 17.7, 14.8, 11.9 and 9.0%, respectively. Statistical analysis showed that highly significant differences between the six flowers color (varieties) of chrysanthemum on the attraction of adults and nymphs of the chrysanthemum aphid, M. sanborni at both the two locations.
Highlights
Chrysanthemum flowers consider one of the important cut flowers in Egypt and around all over the world
Statistical Analysis: This study was carried out to study the effect of flowers color of chrysanthemum on the attraction of individuals of the Chrysanthemum aphid, M. sanborni, data were subjected to analysis of variance (ANOVA) and the means were compared by L.S.D. test at 0.05 level, using SAS program (SAS Institute, 1988)
Giza Governorate: data tabulated in table (1) and figure (1) show that the mean numbers of Chrysanthemum aphid M. sanborni which infested different chrysanthemum flowers colors were 15.5, 13.1, 11.1, 9.2, 7.9 and 6.2 adult /flower respectively
Summary
Chrysanthemum flowers consider one of the important cut flowers in Egypt and around all over the world It is called (The Autumn flower), and sometimes called (The Autumn king). It’s found from oldest countries, it became one of the most popular flowers for people all over the world This is due to their beautiful colors, style of flowers, tolerant the inferable weather factors and possibility cultivation it in different conditions both in open field and under greenhouse conditions. Macrosiphoniella sanborni (Gillette) consider one of the most dangerous insects which infested chrysanthemum flowers both in open field and under glasshouse conditions, Sumei, et al (2014) reported that aphids and especially Chrysanthemum aphid M. sanborni have caused great damage to chrysanthemum production and affected seriously on the flowers both in quantity and quality under glasshouse conditions. Et al (2010) found that Chrysanthemum aphid, M. sanborni represent the most destructive of chrysanthemum pests to cultivation and caused many damages to the flowers. Wang et al (2014) reported that aphids have caused great damage to chrysanthemum production
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