Photoperiod and Reproductive Diapause in the Predatory Bugs Anthocoris tomentosus, a. antevolens, and Deraeocoris brevis (Heteroptera: Anthocoridae, Miridae) with Information on Overwintering Sex Ratios

Horton, David; Lewis, Tamera M.; Hinojosa, Tonya; Broers, Debra A.

doi:10.1093/aesa/91.1.81

Cited by 20 publications

(7 citation statements)

References 0 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…We consider a mean air temperature of 10 • C as a threshold below which the reproductive activity of Orius is arrested in Japan. Highly female-biased overwintering sex ratios have been observed in several species of Anthocoridae (Anderson, 1962a;Collyer, 1967;Elkassabany et al, 1996;Horton et al, 1998). Oviposition did not start until the last week of March and was observed through the first week of April in 1999 ( Figure 6).…”

Section: Discussionmentioning

confidence: 94%

“…A mesh sheet (15 × 10 cm) was put in each case as a shelter for the bugs. In the present paper, we assume that diapause was not induced in these females, although the possibility of diapause cannot be excluded completely (see Horton et al, 1998). A piece of moist cotton wool was put in each case, and occasionally water was supplemented to maintain moisture.…”

Section: Methodsmentioning

confidence: 94%

“…Ito & Nakata (1998a) reported that the lipid content was higher in diapausing females than in males and nondiapausing females, and that this difference was positively correlated with longevity at low temperature. Highly female-biased overwintering sex ratios have been observed in several species of Anthocoridae (Anderson, 1962a;Collyer, 1967;Elkassabany et al, 1996;Horton et al, 1998). In those bugs, it was expected that males would fail to overwinter and females should be inseminated before males die in autumn, but it was found that a small portion of males survive the winter and they can mate with females if temperature is suitable.…”

Section: Discussionmentioning

confidence: 99%

“…Various factors other than diapause induction may account for this failure of development. In the present paper, we assume that diapause was not induced in these females, although the possibility of diapause cannot be excluded completely (see Horton et al, 1998). The critical daylength was defined as the photoperiod at which the diapause inci-dence was the midpoint between the upper and lower saturation level.…”

Section: Methodsmentioning

confidence: 99%

See 3 more Smart Citations

Geographic variability in diapause response of Japanese Orius species

Shimizu¹,

Kawasaki²

2001

Entomologia Exp Applicata

View full text Add to dashboard Cite

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.

show abstract

Section: Discussionmentioning

confidence: 94%

Section: Methodsmentioning

confidence: 94%

Section: Discussionmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

See 2 more Smart Citations

Geographic variability in diapause response of Japanese Orius species

Shimizu¹,

Kawasaki²

2001

Entomologia Exp Applicata

View full text Add to dashboard Cite

show abstract

“…It has expedited the testing of hypotheses regarding genetic interactions (Shapiro et al 2010) between closely related species such as O. pumilio and O. insidiosus, which reside in closely related ecological niches (Shapiro et al 2009b). As accomplished with other anthocorid species, the limited sympatry of the tropical and subtropical O. pumilio with the ubiquitous O. insidiosus can now be assessed in the context of climatic dynamics, genetics (Hinomoto et al 2004, Honda et al 1998, mating behavior and biology (Horton et al 2005a,b), and diapause and biogeography (Horton et al 1998, Ito and Nakata 1998, Kakimoto et al 2003, Musolin et al 2004, Musolin and Ito 2008.…”

Section: Discussionmentioning

confidence: 99%

Ovarian Development in Predacious Orius pumilio: Relationship to Diet, Mating, and Juvenile Hormone

Shapiro

Shirk

2010

Annals of the Entomological Society of America

View full text Add to dashboard Cite

A female minute pirate bug, Orius pumilio (Champion), was found to require both food and mating as an adult to achieve egg development. Last-instar nymphs of O. pumilio were individually placed into 96-well microtiter plates and recovered 24–48 h later as virgin adults, fed only on sucrose or water. The procedure yielded low mortalities. Correct identification of the sex of individuals as last-instar nymphs was achieved with 96% accuracy. The availability of food (eggs of Ephestia kuehniella Zeller) and mates for these isolated females was controlled. Unfed adult females, whether mated or not, did not produce defectible yolk protein when assayed by enzyme-linked immunosorbent assay, nor did they show any follicle development when examined microscopically. Fed but unmated females produced a significant, defectible amount of yolk protein, and some oocyte development was observed, but they contained no fully mature eggs. Females that were both fed and mated fell into two categories: 44% produced mature eggs at a mean rate of 6.4 eggs per female, whereas 56% had ovaries similar to those of fed but unmated females. If treated in mixed sex groups, females that were fed and mated contained more yolk protein than those held in pairs, but increasing the sex ratio of groups above 0.5 (males:females) did not result in a significant increase in yolk protein content. Topical treatment of fed females with methoprene, a juvenile hormone analog, did not trigger an increase in yolk protein contents. We conclude that vitellogenesis is a two-stage process in adult female O. pumilio. Early vitellogenesis requires a nutritious adult diet, whereas full vitellogenesis and egg maturation also require mating.

show abstract