Geographic variability in diapause response of Japanese Orius species

Abstract

Interspecific and latitudinal variation in diapause characteristics were examined in 12 strains of Orius species (Heteroptera: Anthocoridae) including O. sauteri (Poppius), O. nagaii Yasunaga, O. minutus (L.), O. strigicollis (Poppius), and O. tantillus (Motschulsky) from Japan. A latitudinal cline was found in the photoperiodic response controlling reproductive diapause: the lower the latitude, the lower the diapause incidence and the shorter the critical daylength. To examine the overwintering success, eight strains including four species derived from different latitudes (26-43 • N) were reared outdoors in Tsukuba (36 • N), central Japan from the autumn of 1998 to the summer of 1999, and their winter survival and spring fecundity were recorded. Most females of the northern strains entered diapause in the autumn when the temperature was still high, and died before winter without oviposition. In the southern strains including a nondiapause Okinawa (26 • N) strain of O. strigicollis, females overwintered as well as native strains in a state of quiescence. In all strains, the winter survival was significantly lower in males than in females, and eggs and nymphs failed to overwinter.

Comparison of the reproductive potential of three Orius species, O. strigicollis, O. sauteri, and O. minutus (Heteroptera: Anthocoridae), using eggs of the Mediterranean flour moth as a food source

“…Murai et al (2001) reported that 28.6% of O. sauteri reared at 25°C using E. kuehniella eggs as the diet under long-day conditions (16L : 8D) did not lay eggs. Furthermore, Shimizu and Kawasaki (2001) reported the presence of non-ovipositing females even in the non-diapausing Okinawa strain of O. strigicollis reared as a colony at 20°C using E. kuehniella eggs as the diet under long-day conditions (16L : 8D). As shown in these results, nonovipositing females were observed when reared under non-diapause conditions and even in the non-diapause strain.…”

“…Although O. minutus is also a dominant species on eggplants (Ohno and Takemoto, 1997), some field data suggest that this insect may prefer trees as its host (T. Noda, unpublished data). On the other hand, O. strigicollis has been proposed as an effective biological control agent during the short days in the winter season because this species has a weaker reproductive diapause than O. sauteri, O. minutus, and O. nagai (Shimizu and Kawasaki, 2001;Kakimoto et al, 2003). O. strigicollis, O. sauteri, and O. minutus are frequently found together on various kinds of crops and herbaceous plants (Yasunaga, 1997b), and on deciduous trees such as mulberry, Morus spp.…”

“…(Kakimoto et al, 2002). However, the life history parameters of these Orius species have not been compared in detail except for their reproductive diapause (Shimizu and Kawasaki, 2001) and various developmental parameters (Kakimoto et al, 2003).…”

Prey Suitability of Thrips palmi (Thysanoptera: Thripidae) and Tetranychus kanzawai (Acari: Tetranychidae) for the Development and Reproduction of Wollastoniella rotunda (Hemiptera: Anthocoridae)

“…1993; Bush et al, 1993;Chyzik et al, 1995;Wearing andColhoun, 1999 1993 Orius sauteri Poppius 1989Dixon, 1959, 1994Kawai, 1995Kawai, 19881991 Shimizu andKawasaki, 2001 Nakashima et al,…”

Maternal photoperiod effect on and geographic variation of diapause incidence in Cotesia plutellae (Hymenoptera: Braconidae) from China

“…The northern Changchun population produced a higher incidence of diapause and had a higher critical temperature for diapause induction in most of the tested combinations than the southern Hangzhou population. Such variability in diapause trait between populations for most widespread insect and mite species has been well documented (Maslennikova and Mustafayeva, 1971;Weseloh, 1982;Brodeur and McNeil, 1989;Kraaijeveld and Alphen, 1995;McWatters and Saunders, 1996;Yoshio and Ishii, 1998;Ito and Nakata, 2000;Shimizu and Kawasaki, 2001;Kurota and Shimada, 2003;Gillespie and Quiring, 2005;Kato, 2005;Schmidt et al, 2005;Takafuji et al, 2005). The differences reflect physiological and ecological adaptations to local climatic conditions.…”