CICLO Y PARÁMETROS BIOLÓGICOS DE Clitostethus arcuatus (Coleoptera: Coccinellidae), DEPREDADOR DE MOSCA BLANCA, Siphoninus phillyreae, EN CONDICIONES DE LABORATORIO

El objetivo del presente estudio fue determinar el ciclo, parámetros biológicos y descripción morfológica de Clitostethus arcuatus (Rossi), depredador de Siphoninus phillyreae (Haliday). Para la obtención de presas, se infestaron plantones de olivo con S. phillyreae colectado de olivares en Tacna. En el laboratorio, los diferentes estados de desarrollo de C. arcuatus fueron recuperados de los mismos olivares, se confinaron en una jaula de crianza para obtener adultos de la misma edad, los cuales fueron emparejados en unidades de crianza (UC), y colocados en una estufa con aire circulante a 24,2 ± 0,8°C y 36,0 ± 5,9% HR. Diariamente fueron observados hasta su muerte, y a partir de sus posturas se determinó el ciclo de desarrollo que fue de 24 días, de los cuales 3,80; 15,78 y 4,42 días fueron para los estados de huevo, larva y pupa respectivamente. El ciclo biológico de C. arcuatus fue de 77,02 días. La capacidad de oviposición 136,35 huevos/hembra; viabilidad de huevos de 71,43%; mortalidad de larvas 36,25%; capacidad de depredación de LI 3,8 huevos/día, LII 5 huevos/día; LIII 8,2 y 3,6 huevos y ninfas/día respectivamente, LIV 11,4 y 3,4 huevos y ninfas/día respectivamente, adultos 9,8; 4,6 y 1,4 huevos, ninfas y adultos/día respectivamente; proporción sexual 0,59 y la longevidad de 53,02 días.

An annotated checklist of Coccinellidae (Insecta, Coleoptera) with eight new records from the Kingdom of Saudi Arabia

The members of Coccinellidae are among the most important biological control agents being used throughout the world. The objective of this study was to provide the current scenario of this family in Saudi Arabia. Collection surveys of ladybird individuals were conducted throughout Saudi Arabia. A total of 5400 specimens of Coccinellidae were collected belonging to 51 species in 19 genera and seven tribes: Sticholotidini (2 genera / 10 species), Coccidulini (1/3), Scymnini (4/24), Diomini (1/1), Hyperaspidini (1/3), Chilocorini (3/8), Noviini (1/3), Coccinellini (8/11), Epilachnini (2/2). One genus, Clitostethus, and eight species and subspecies, Cheilomenes lunata lunata (Fabricius, 1775), Clitostethus arcuatus (Rossi, 1794), Nephus ornatulus Korschefsky, 1931, N. nigricans (Weise, 1879), Pharoscymnus fleischeri (Weise, 1883), Novius yemenensis Raimundo & Fürsch, 2006, Scymnus (Scymnus) scapuliferus Mulsant, 1850, and Stethorus endrodyi Fürsch, 1970, are reported as new records to Saudi Arabia. Two endemic species, Scymnus agrumi and S. arabicus, were recorded. This study also describes the geographical distribution for each species and the diagnostic characters for new records.

New data on the distribution of ladybird beetles (Coleoptera: Coccinellidae) in the eastern part of the Baltic Coast region in Poland

New data on the occurrence of ladybird beetles in the eastern part of the Baltic Coast of Poland are presented. Studies were carried out between 2012 and 2017 along the Baltic coast from Krynica Morska to Białogóra. We found 44 species of Coccinellidae. Ten of the recorded species (Clitostethus arcuatus, Scymnus haemorrhoidalis, S. limbatus, S. abietis, S. auritus, S. rubromaculatus, Stethorus pusillus, Hyperaspis concolor, H. reppensis, Platynaspis luteorubra) are reported for the first time from the investigated area. Two of them, C. arcuatus and S. pusillus, are new for the whole Baltic Coast region of Poland. The recorded contribution of the invasive Harmonia axyridis to all ladybird individuals was relatively low (12.7%).

Winter and early spring assemblages of ladybird beetles (Coleoptera: Coccinellidae) in two forest habitats in suburban area of Warsaw, central Poland

In March and April of 2014 and 2015, overwintering and post-overwintering assemblages of ladybird beetles were investigated in deciduous (Tilio-Carpinetum) and mixed forest (Querco roboris-Pinetum) patches in a forest complex on the north-western periphery of Warsaw. March samples were collected by sifting forest litter with an entomological sieve, while in April, ladybirds were collected from the vegetation using sweeping net and beating sheet. In both years, mean densities of ladybirds found in March in the two forest types were low, not exceeding 2 individuals/m2. Seven ladybird species were found overwintering in the litter of the deciduous forest and four in that of the mixed forest. Propylea quatuordecimpunctata was the most abundant in both habitats in 2014, while in 2015 in the litter of the deciduous forest Vibidia duodecimguttata predominated. In April, 15 species were recorded in the deciduous forest and 7 in the mixed forest. Scymnus ferrugatus predominated in the former plant community and P. quatuordecimpunctata and Coccinella septempunctata in the latter. Several of the recorded species, such as Clitostethus arcuatus, Scymnus femoralis and S. abietis, have rarely been reported from Poland.