Introduction

Bembecia scopigera is one of the most common species known as harmful of sainfoin. B. scopigera of detail bionomic were given by BOURNIER and KHIAL (1968). Sˇ PATENKA and LASˇ TU° VKA (1990) gave redescription of the species and said that the caterpillar of it was monophagus in the roots of Onobrychis viciifolia and also affects cultivated crops. TAMER & ÖZER (1990) investigated the biology of B. scopigera on sainfoin (Onobrychis viciifolia) in Ankara province. The biology of B. scopigera was investigated in laboratory and under natural conditions, and infestation rates on Onobrychis sativa fields were determined by GÜLTEKIN & GÜÇLÜ (1997).

Detail egg chorion morphology of some Sesiidae species was studied in scanning electron microscope. TOSEVSKI et al. (1996) compared the chorion morphology of eggs of 7 species from the genus Chamaesphecia and gave their sizes and SEM photos of eggs. NAUMANN and SCHROEDER (1980) gave measurements size of eggs of Chamaesphecia tenthrediniformis and .. empiformis with electron and light microscopy images. BAK˛OWSKI (2013) studied the egg morphology of 7 species from different genera. MASO and RIBES (1990) examined the fine structure of egg chorion of Sesia apiformis. Until now only B. megillaeformis belonging to the genus Bembecia of egg chorion was examined using scanning electron microscope (BAK˛OWSKI, 2013).

In this study, new host plant of B. scopigera was found and egg’s chorion morphology was studied using SEM. Also distribution of this species is briefly evaluated and contributed to the distribution of the species from Turkey.

Material and Methods

A female specimen of .. scopigera was collected from Ardahan, Posof, northeast of Sarıdarı Village (41º 33’ N / 42º 49’ E), 19-VIII-2014, A. Hasbenli leg. The specimen was seen laying three eggs on plant’s leaves (Figs. 1-3) and then it was caught using by sweep net. Leaves were placed into a storage box with eggs and brought to the laboratory. One of the three eggs was examined chorion surface by scanning electron microscopy. Other eggs were stored in a petri dish at room temperature to observe colour changes in chorion. The specimen is deposited in Zoological Museum of Gazi University (ZMGU).

For SEM study, 72 hours old eggs of .. scopigera without contact of any chemicals were mounted with double sided tape on stubs and coated with gold in a Polaron SC 502 Sputter Coater. They were examined with a Jeol JSM 5600 Scanning Electron Microscope at 10 kV.

Female specimen of .. scopigera was collected from field study while it was singly laying on the bottom surface of leaves of Onobrychis atropatana (Figs. 1-2). .. atropatana is new host plant for this species.

Chorion structure of the egg: Freshly laid eggs were dark brown. Their colour didn’t change even a few weeks later. The oval shaped eggs were flattened in the micropylar polar (Fig. 4A). The egg examined in scanning electron microscopy was 0,69 mm in height and 0,46 mm in width. The chorion surface was formed of polygons (pentagon and hexagon) divided by low ridges (Fig. 4B). The polygons were different in sizes (Fig. 4C). The egg surface in polygons covered with numerous aeropyles (Fig. 4D). The micropyle pit was surrounded by a rosette of 9 petal shaped cells (Fig. 4E). Rosette and secondary cells were including very few aeropyles. The micropyle pit was containing mutually four holes (Fig. 4F).

Discussion

Host plants of B. scopigera consist of family Fabaceae. Although Sˇ PATENKA & LASˇTU°VKA, 1990 said that this species was monophagus to Onobrychis viciifolia, there are several host plants of the species. The most known host plants is genus Onobrychis such species as Onobrychis sativa, Onobrychis viciifolia, Onobrychis toumefortii (DE FREINA, 1994;Sˇ PATENKA & LASˇ TU° VKA, 1990). Onobrychis atropatana is new host plant for this species. According to DE FREINA (1994), also the other known host plants for this species are Lotus corniculatus, Anthyllis vulneraria, Doycnium pentaphyllum, Ononis spinosa, Medicago spp. Melilotus spp., Hippocrepis comosa, Lathyrus pratensis, Cenaurea spp.

When we compared our SEM egg photos of B. scopigera with B. megillaeformis in BAK˛OWSKI (2013), there are differences. Egg chorion of B. megillaeformis is located many aeropyles such like a spongy and not formed of polygons divided by ridges. The numbers of rosette cells (9) of .. scopigera are more than B. megillaeformis (6-7).

Even though .. scopigera was showed wide distribution from Turkey mentioned in many literatures (Sˇ PATENKA et al., 1999; NAUMANN & SCHROEDER, 1980 and DE FREINA, 1994), this species have recorded a few provinces from Turkey. When we examined the distribution of the B. scopigera in Turkey, it has shown sectional distribution from east to west in the northern part of the country, also it was recorded in the southern part as Mersin, Hatay and Karaman provinces in the Mediterranean region of Turkey (Fig. 5)(KOÇAK & KEMAL, 2009;GARREVOET et al., 2007,SAG˘IROG˘LU & CAN CENGIZ, 2011;TAMER et al., 1997). The specimen from Ardahan represents a new province record. With further detailed studies that will be made in Turkey, the distribution of this species is expected to expand.

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