INDUCTION AND TERMINATION OF DIAPAUSE IN THE FACE FLY, MUSCA AUTUMNALIS (DIPTERA: MUSCIDAE), IN THE LABORATORY

1978 ◽  
Vol 110 (6) ◽  
pp. 617-622 ◽  
Author(s):  
E. T. N. Caldwell ◽  
R. E. Wright
Keyword(s):  
Late Summer ◽  
Diapause Induction ◽  
Total Darkness ◽  
Diapause Termination ◽  
Critical Photoperiod ◽  
The Face ◽  
Musca Autumnalis

AbstractDiapause induction studies showed that face flies, Musca autumnalis De Geer, from a recently established colony, entered diapause more readily than those that had been colonized for many years. Photoperiods of less than 16 h of light induced diapause at 16° and 27 °C but more flies entered diapause at 16°C. Maximum numbers of flies entered diapause under total darkness at 16°C, but the critical photoperiod corresponding to natural periods of daylight in late summer was 15 h of light at 16°C. Diapause termination studies indicated that 4 months’ exposure to 5 °C under total darkness was required for the termination of diapause.

EFFECT OF LATITUDE ON THE CRITICAL PHOTOPERIOD FOR DIAPAUSE INDUCTION IN THE BERTHA ARMYWORM, MAMESTRA CONFIGURATA (LEPIDOPTERA: NOCTUIDAE)

1983 ◽  
Vol 115 (8) ◽  
pp. 1039-1042 ◽  
Author(s):  
B. M. Hegdekar
Keyword(s):  
Temperature Regime ◽  
Diapause Induction ◽  
The Other ◽  
Fluctuating Temperature ◽  
Mamestra Configurata ◽  
Ambient Temperatures ◽  
Critical Photoperiod ◽  
Lepidoptera Noctuidae ◽  
H 20 ◽  
Bertha Armyworm

AbstractThe critical photoperiod for diapause induction in pupae of Mamestra configurata Walker in Manitoba was 16 h 06 min at Glenlea (49°38′ N), 16 h 20 min at Grandview (51°10′ N), and 16 h 42 min at Birch River (52°24′ N). The differences in cirtical photoperiods observed at Glenlea and Grandview were not significant. At least two different photoperiods exist, one in the Glenlea and Grandview areas and the other in the Birch River area. In the laboratory, the critical photoperiod was 13.5 h when larvae were exposed to a daily fluctuating temperature regime of 12 h at 25 °C and 12 h at 10 °C. Longer critical photoperiods found for the field populations may be related to the relatively low ambient temperatures to which the larvae were exposed in field cages.

COXSACKIE B5 INFECTIONS WITH EXANTHEMS

PEDIATRICS ◽  
1963 ◽  
Vol 31 (3) ◽  
pp. 455-462
Author(s):  
James D. Cherry ◽  
A Martin Lerner ◽  
Jerome O. Klein ◽  
Maxwell Finland
Keyword(s):  
Lymph Node ◽  
Umbilical Cord ◽  
Late Summer ◽  
Significant Rise ◽  
City Hospital ◽  
Maculopapular Eruption ◽  
Exanthem Subitum ◽  
Lymph Node Enlargement ◽  
Boston City Hospital ◽  
The Face

Seven cases of Coxsackie B5 virus infection with exanthem observed at the Boston City Hospital during the late summer of 1961, are reported. The virus was isolated from six of the patients and a fourfold or greater rise in titer of hemagglutinin-inhibiting antibodies (HIA) to this virus was demonstrated in five of these six cases. In the seventh patient there was a significant rise in HIA titer, but attempts to isolate the virus were unsuccessful. The illness in these patients was characterized by a moderate fever, usually of 2 to 3 days duration with the fine, erythematous maculopapular eruption involving mostly the face and trunk, appearing toward the end of the febrile period, and somewhat resembling exanthem subitum. There was also some cervical and occipital lymph node enlargement. In 49 pairs of bloods obtained from mothers and infants (umbilical cord) at the time of delivery, the titers of HIA to Coxsackie B5 virus in the maternal sera were usually fourfold to eightfold greater than in the sera of corresponding umbilical cord blood. HIA titers of 1:80 or higher against Coxsackie B5 virus were demonstrated in 65% of these maternal sera, but only in 2 of 75 sera (2.7%) obtained from infants and children who did not have a rash during the summer of 1961.

Analysis of isozyme loci in the face fly,Musca autumnalis DeGeer

1992 ◽  
Vol 30 (11-12) ◽  
pp. 625-634 ◽  
Author(s):  
E. S. Krafsur ◽  
W. C. Black
Keyword(s):  
The Face ◽  
Isozyme Loci ◽  
Musca Autumnalis

Measuring the duration and frequency of wing beat of Musca autumnalis (Diptera: Muscidae) using a novel tether method

2013 ◽  
Vol 146 (1) ◽  
pp. 106-110 ◽  
Author(s):  
Hanayo Arimoto ◽  
Harry K. Kaya ◽  
Edwin E. Lewis
Keyword(s):  
Age Groups ◽  
Wing Beat ◽  
Flight Tests ◽  
Male And Female ◽  
The Face ◽  
Musca Autumnalis

AbstractThe wing beat frequencies (WBF) and flight durations of the face fly, Musca autumnalis De Geer (Diptera: Muscidae), were evaluated at 1, 3, 5, 7, 11, and 14 days post-eclosion. For flight tests, flies were tethered magnetically using magnetic primer paint. WBF were measured stroboscopically. The average WBF for one-day-old flies was significantly lower compared with the average WBF of all other age groups for both female and male face flies. Based on our results, male and female face flies require more than 24 hours post eclosion to reach a WBF of over 167 beats per second and continuously fly for more than 10 minutes. Age was a significant factor towards WBF. The present study is the first to report laboratory descriptions of face fly flight capabilities. The benefits of the magnetic paint tether (MagPaT) method are discussed.

Diapause Induction in a Kentucky Population of Diprion similis (Hymenoptera: Diprionidae)

1999 ◽  
Vol 34 (3) ◽  
pp. 328-334 ◽  
Author(s):  
Heidi L. Melcher ◽  
Lee H. Townsend
Keyword(s):  
Diapause Induction ◽  
Pine Sawfly ◽  
Sensitive Stage ◽  
Diprion Similis ◽  
Critical Photoperiod ◽  
Photoperiod Sensitive ◽  
Chilling Period

Critical photoperiod, sensitive stage for diapause induction, and requirements for termination of diapause were studied in a colony of the introduced pine sawfly, Diprion similis (Hartig), established from a feral Kentucky population. We investigated induction of diapause in the laboratory under photoperiods of 10:14, 11:13, 12:12, 13:11, 14:10, 15:9, and 16:8 (L:D) in the first trial, and added a photoperiod of 9:15 (L:D) in the second trial. Individuals exposed to light periods ≤12:12 (L:D) entered diapause; individuals in a photoperiod > 13:11 (L:D) bypassed diapause. The sensitive stage was determined using reciprocal switches of diapause-inducing (9:15) and non-diapause inducing (16:8) L:D regimes. Our studies indicated that late instars of the introduced pine sawfly are significantly sensitive to photoperiod. Termination of diapause in D. similis did not require a cold or chilling period. All individuals from critical photoperiod trials were kept at 22°C to determine the duration of diapause. Diapausing individuals emerged from the cocoon after 82 to 105 d, compared to 6 to 23 d for individuals not entering diapause.

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