Results 161 to 170 of about 8,839 (212)
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Journal of Experimental Biology, 1977
ABSTRACT Unlike the initial diapause in Ephippiger cruciger, the late embryonic diapause occurs in every egg in natural environmental conditions. It is eliminated by one relatively prolonged period of cooling and the proportion of eggs completing diapause development increases with increased cooling time.
R. L. Dean, J. C. Hartley
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ABSTRACT Unlike the initial diapause in Ephippiger cruciger, the late embryonic diapause occurs in every egg in natural environmental conditions. It is eliminated by one relatively prolonged period of cooling and the proportion of eggs completing diapause development increases with increased cooling time.
R. L. Dean, J. C. Hartley
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Geographic variation of diapause intensity in the spider mite Tetranychus urticae
Physiological Entomology, 1993Abstract. Eight strains of the spider mite Tetranychus urticae , originating from different localities in western and central Europe, with latitudes ranging from 40.5 to 60 o N, displayed marked differences in the period of chilling ...
D. S. KOVEOS, A. KROON, A. VEERMAN
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Light Intensity, Photoperiod, and Diapause Induction in Face Flies (Diptera: Muscidae)
Environmental Entomology, 1990In the fall, adult face flies enter a facultative diapause in which mating and ovarian maturation do not take place, and their fat bodies become hypertrophied. Laboratory studies implicate short photoperiod as the primary inducer of diapause, but the response is temperature-dependent.
L. D. Evans, E. S. Krafsur
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Journal of Insect Physiology, 2011
The rice stem borer, Chilo suppressalis Walker, overwinters in China as a larva in facultative diapause. The instars and body weights of overwintering larvae vary widely. In this paper, the relationships between body weight and supercooling capacity, diapause intensity and post-diapause reproductive potential of overwintering larvae collected in late ...
Shu, Xu +6 more
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The rice stem borer, Chilo suppressalis Walker, overwinters in China as a larva in facultative diapause. The instars and body weights of overwintering larvae vary widely. In this paper, the relationships between body weight and supercooling capacity, diapause intensity and post-diapause reproductive potential of overwintering larvae collected in late ...
Shu, Xu +6 more
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Diapause Prevention in Aphidoletes aphidimyza (Diptera: Cecidomyiidae) by Low-intensity Light
Environmental Entomology, 1986Low-intensity radiation at night prevented diapause in larvae of the predatory midge Aphidoletes aphidimyza (Rondani) under environmental conditions (9:15 [L:D] photoperiod and 2l:l5°C [T:C] thermoperiod) that induced 100% diapause when “night” was dark.
Linda A. Gilkeson, Stuart B. Hill
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Journal of Insect Physiology, 1972
Abstract Two strains of Chrysopa carnea, one originating from Ithaca, New York (42°27′ N) and one from Chandler, Arizona (33°19′ N) displayed marked differences in both initiation and intensity of the facultative reproductive diapause. The northern stock had a critical photoperiod 1 hr longer (between LD 13·5 : 10·5 and LD 14 : 10) than the southern ...
Mauice J. Tauber, Catherine A. Tauber
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Abstract Two strains of Chrysopa carnea, one originating from Ithaca, New York (42°27′ N) and one from Chandler, Arizona (33°19′ N) displayed marked differences in both initiation and intensity of the facultative reproductive diapause. The northern stock had a critical photoperiod 1 hr longer (between LD 13·5 : 10·5 and LD 14 : 10) than the southern ...
Mauice J. Tauber, Catherine A. Tauber
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HERITABILITY OF DIAPAUSE INTENSITY IN HYPHANTRIA CUNEA AND CORRELATED FITNESS RESPONSES
The Canadian Entomologist, 1970AbstractThe heat requirements for diapause termination in pupae of Hyphantria cunea are subject to a high degree of generic control. Offspring–parent regression analysis based on a positively assortative mating pattern, which is the normal pattern in field populations of this species, provides a slope of 0.60.
R. F. Morris, W. C. Fulton
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Journal of Insect Physiology, 2012
The chestnut weevil Curculio sikkimensis undergoes a prolonged larval diapause that is completed by repeated exposure to chilling and warming. We examined the possible reversibility of diapause intensity in response to temperature changes. All larvae were subjected to an initial chilling followed by incubation at 20°C to force pupation of the 1-year ...
Morio, Higaki, Masatoshi, Toyama
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The chestnut weevil Curculio sikkimensis undergoes a prolonged larval diapause that is completed by repeated exposure to chilling and warming. We examined the possible reversibility of diapause intensity in response to temperature changes. All larvae were subjected to an initial chilling followed by incubation at 20°C to force pupation of the 1-year ...
Morio, Higaki, Masatoshi, Toyama
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Journal of Stored Products Research, 1991
Abstract The duration of diapause at 20°C in eight stocks of Plodia interpunctella and two stocks of Ephestia cautella was compared with the tolerance of diapausing larvae to methyl bromide, the fumigant used for the control of infestations of these moths in the food industry. The tolerance of the P.
C.H. Bell, N. Savvidou
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Abstract The duration of diapause at 20°C in eight stocks of Plodia interpunctella and two stocks of Ephestia cautella was compared with the tolerance of diapausing larvae to methyl bromide, the fumigant used for the control of infestations of these moths in the food industry. The tolerance of the P.
C.H. Bell, N. Savvidou
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Journal of Insect Physiology, 2006
Embryonic diapause is commonly terminated by exposure to low temperature for a certain duration. Previous studies using the silkworm, Bombyx mori, showed that extracellular signal-regulated kinase (ERK), a member of the mitogen-activated protein kinase family, was activated by cold exposure and regulated diapause termination.
Kurako, Kidokoro +3 more
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Embryonic diapause is commonly terminated by exposure to low temperature for a certain duration. Previous studies using the silkworm, Bombyx mori, showed that extracellular signal-regulated kinase (ERK), a member of the mitogen-activated protein kinase family, was activated by cold exposure and regulated diapause termination.
Kurako, Kidokoro +3 more
openaire +2 more sources