Comparative annual analysis of the inspected armored, soft scales and mealybugs (Hemiptera: Coccoidea) populations on Hedera canariensis in Alexandria , Egypt

Document Type : Original Article

Authors

1 Plant Protection Research Institute, Agricultural Research Center, Alexandria, Egypt.

2 Plant Protection Department, Faculty of Agriculture (Saba Basha), Alexandria University, Egypt

Abstract

A survey of armored, soft scales and mealybugs  (Hemiptera: Coccoidea)  infesting the ornamental plant species Hedra canariensis in Montazah garden was carried out in the years of 2005-2007. The results revealed the occurrence of two armored scales: Mycetaspis personata (Comstock) and  Aspidiotus nerii Bouché  (Hemiptera, Diaspididae),two coccid species named: Pulvinaria psidii Maskell (Hemiptera, Coccidae),and Coccus hesperidum (Linnaeus) (Hemiptera, Coccidae) and one pseudococcid species: Planococcus citri (Risso) (Hemiptera: Pseudococcidae). Considering the armored scale group, the highly abundance was recorded during January and February (75 and 83.4 % of grand total count) in the first year and in February (77.8 %) in the second year. The lowest abundance was recorded during July in two successive years.     Regarding the population count of soft scale group, it’s clear that the highest rate of these coccids was observed during July and August during the first year while in the second year this rate reached 94.0% during July only. The lowest rate of soft scale recorded during February in two years (16.4 and 22.2 % of total count in respect). The scarcely inspected citrus mealy bug individuals; P. citri was found in low numbers, while disappeared completely during the elapsing spring-summer months from April till August or / and September; and early winter month of January or / and January-February in the 1st or / and 2nd years, respectively.

Keywords

Egyptian Academic Journal of Biological Sciences. A, Entomology
Volume 5, Issue 3
December 2012
Pages 19-26

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