Results 191 to 200 of about 25,032 (231)
Phenotypic changes in natural populations of Anopheles gambiae s.l. at the onset of the long dry season in tropical savannahs of Burkina Faso, West Africa. [PDF]
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Debraining and diapause development in Manduca sexta pupae
Journal of Insect Physiology, 1974Debraining experiments with wounded and normal controls were done at three different ages on diapausing Manduca sexta pupae of Kentucky and Illinois stocks. With early ages of both stocks debrained pupae escaped from diapause over an extended period of time, but wounded insects developed much earlier and at the same time as the normals. With later ages
G R, Wilson, J R, Larsen
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Journal of Insect Physiology, 1985
Abstract Eggs of the European skipper, Thymelicus lineola , containing pharate first-instar larvae were brought into the laboratory at the beginning of each month from September to May and maintained at 20°C, 14L:10D. No emergence was observed within 40 days of collection before December.
Jeremy N. McNeil, Paul G. Fields
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Abstract Eggs of the European skipper, Thymelicus lineola , containing pharate first-instar larvae were brought into the laboratory at the beginning of each month from September to May and maintained at 20°C, 14L:10D. No emergence was observed within 40 days of collection before December.
Jeremy N. McNeil, Paul G. Fields
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Egg development patterns in diapausing and non‐diapausing species of Ruspolia
Entomologia Experimentalis et Applicata, 1988AbstractThe egg development of the African bushcricket Ruspolia differens is shown to be direct, without any delay, and to be highly synchronised. It is also strongly temperature dependent and closely fits the thermal summation equation Days = (T°C‐14.8)/252, even if incubation temperatures (T) are changed during the course of development.
J. C. Hartley, Yoshikazu Ando
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Experimental and Applied Acarology, 2017
Previous studies on the spider mite Eotetranychus smithi Pritchard & Baker have shown that diapause in eggs is induced by low temperature alone and that females developed at ≤ 17.5 °C laid diapause eggs, regardless of the photoperiod. In this study, diapause eggs were kept at 5 °C and a photoperiod of 16L:8D for 0-120 days and then maintained at 25 °C ...
Y. Takano, M. S. Ullah, T. Gotoh
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Previous studies on the spider mite Eotetranychus smithi Pritchard & Baker have shown that diapause in eggs is induced by low temperature alone and that females developed at ≤ 17.5 °C laid diapause eggs, regardless of the photoperiod. In this study, diapause eggs were kept at 5 °C and a photoperiod of 16L:8D for 0-120 days and then maintained at 25 °C ...
Y. Takano, M. S. Ullah, T. Gotoh
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Journal of Insect Physiology, 2010
Effects of photoperiod and cold exposure on diapause termination, post-diapause development and reproduction in Loxostege sticticalis were examined. Larvae were reared at diapause inducing condition (22 degrees C, L:D 12:12) consistently or transferred to long day photoperiod (L:D 16:8) and darkness (L:D 0:24) respectively, after entering into diapause.
Xing Fu, Jiang +4 more
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Effects of photoperiod and cold exposure on diapause termination, post-diapause development and reproduction in Loxostege sticticalis were examined. Larvae were reared at diapause inducing condition (22 degrees C, L:D 12:12) consistently or transferred to long day photoperiod (L:D 16:8) and darkness (L:D 0:24) respectively, after entering into diapause.
Xing Fu, Jiang +4 more
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Acetylcholinesterase in Celerio euphorbiae during pupal development with diapause
Journal of Insect Physiology, 1971Abstract Striking changes in AChE activity and Ach content occur in the tissues of the abdomen of Celerio pupae during development with diapause. These changes are sex-dependent and unrelated to the nervous system. The pattern of changes is similar in development with and without diapause, but its correlation with the morphological changes in the ...
K, Grzelak, Z, Lassota, A, Wroniszewska
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Intrauterine development after diapause in the marsupial Macropus eugenii
Developmental Biology, 1973Abstract Three-quarters of adult female Macropus eugenii carry a diapausing blastocyst for up to 10 months of the year. For the first half of the year the diapause is due to the presence of a pouch young, but it continues through the subsequent anestrus. Spontaneous resumption occurs 1–15 days after the summer solstice.
M B, Renfree, C H, Tyndale-Biscoe
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