In this study, the presence of the scale insect Dynaspidiotus abieticola (Koroneos) (Hemiptera: Diaspididae) has been recorded in fir trees, Abies cephalonica Loudon (Pinaceae), on the Taygetus mountain (Peloponnese, South Greece). The biology of the scale insect was observed during a twelve month period, from February 2013 to January 2014. It was determined that the insect completed one generation. It overwintered as a reproductive adult female. The first ovipositions and hatching of crawlers were observed in early May, 2nd instar nymphs appeared at the beginning of August, male nymphs were seen in September and finally the first adult females at the beginning of October.
Phenology and parasitism of the scale insect, Coccus pseudomagnoliarum (Kuwana) (Hemiptera: Coccomorpha: Coccidae), infesting Citrus sinensis (Rutaceae), were studied in Papagou area, in northeastern Athens, from June 2015 to June 2017. Coccus pseudomagnoliarum is a univoltine, viviparous, parthenogenetic species. It overwintered as settled 1st instar nymph on the shoots of the trees. The 2nd instar nymphs appeared between the beginning of April and the end of May, and the mature females were recorded from the beginning of May until the middle of June. The crawlers appeared between the middle of May and the middle of June and the 1st instar nymphs settled on the shoots at the end of May, where they remained during the whole summer period, winter, until the beginning of April next year. Parasitism of the scale was recorded between the beginning of May and the middle of May and reached a maximum rate of 35%. The recorded parasitoid species were Coccophagus shillongensis Hayat and Singh (Hymenoptera: Aphelinidae), Coccophagus spp. and Metaphycus dispar (Mercet) (Hymenoptera: Encyrtidae).
Two invasive mealybug species, Phenacoccus peruvianus Granara de Willink and Phenacoccus madeirensis Green (Hemiptera: Pseudococcidae), have been recorded on new species of ornamental plants in diff erent regions of Greece. Phenacoccus peruvianus was recorded in Athens on Cestrum nocturnum L. (Solanaceae) in September 2013. Phenacoccus madeirensis was found in Kalamata (Peloponnese) on Aloysia citriodora Palau (Verbenaceae) in May 2014 and on Osteospermum jucundum (Phillips) (Asteraceae) in July 2014. This is the first record of O. jucundum as host plant of P. madeirensis