Constant and Fluctuating Temperature Effects on Developmental Rates and Life Table Statistics of the Greenbug (Homoptera: Aphididae)1

1988 ◽  
Vol 81 (2) ◽  
pp. 501-507 ◽  
Author(s):  
D. D. Walgenbach ◽  
N. C. Elliott ◽  
R. W. Kieckhefer
Keyword(s):  
Life Table ◽  
Temperature Effects ◽  
Fluctuating Temperature ◽  
Developmental Rates ◽  
Constant And Fluctuating Temperature

Effect of constant and fluctuating temperature on daily melatonin production by eyecups from Rana perezi

1997 ◽  
Vol 167 (3) ◽  
pp. 221-228 ◽  
Author(s):  
A. I. Valenciano ◽  
M. Alonso-Bedate ◽  
M. J. Delgado ◽  
A. L. Alonso-G�mez
Keyword(s):  
Fluctuating Temperature ◽  
Melatonin Production ◽  
Constant And Fluctuating Temperature ◽  
Rana Perezi

DEVELOPMENTAL VARIABILITY AMONG LABORATORY REARED BALSAM WOOLLY APHID (HEMIPTERA: CHERMIDAE)

1972 ◽  
Vol 104 (2) ◽  
pp. 203-208 ◽  
Author(s):  
Michael D. Atkins
Keyword(s):  
First Generation ◽  
Temperature Cycling ◽  
The Other ◽  
Entire Group ◽  
Fluctuating Temperature ◽  
Complete Development ◽  
Woolly Aphid ◽  
Time Required ◽  
Ecological Races ◽  
Constant And Fluctuating Temperature

AbstractNeosistentes reared from eggs of the final generation of the year only developed under a regime of fluctuating temperature. Progeny of the first generation the following spring developed under both constant and fluctuating temperature. In addition, the latter group displayed developmental variability that might provide a basis from which distinct ecological races could develop. Those individuals that developed rapidly showed little variability in the time required to complete development. On the other hand, those that developed slowly displayed more variability. There was no evidence of two distinct developmental groups among individuals reared under a regime of temperature cycling between 55°F and 75°F as the entire group developed rapidly; this treatment also produced the lowest mortality.

Effect of constant and fluctuating temperature regimes and seed source on the coleoptile length of tall and semidwarf wheats

1987 ◽  
Vol 27 (1) ◽  
pp. 113 ◽  
Author(s):  
BJ Radford
Keyword(s):  
Environmental Conditions ◽  
Laboratory Experiments ◽  
Seed Source ◽  
Seed Maturation ◽  
Wheat Cultivars ◽  
Coleoptile Length ◽  
Fluctuating Temperature ◽  
Temperature Regimes ◽  
The Mean ◽  
Constant And Fluctuating Temperature

Laboratory experiments were carried out to determine the effects of constant and fluctuating temperature regimes on the final coleoptile length of 8 wheat cultivars (Banks, Cook, Gatcher, Hartog, Kite, Oxley, Shortim and Spica) and the effect of environmental conditions during seed maturation (seed source) on the coleoptile length of 5 cultivars (Banks, Bass, Cook, Kite and Oxley). Mean coleoptile length decreased from 10.8 cm at 15�C to only 3.1 cm at 35�C, a reduction within this temperature range of 1 cm for every 2.6�C rise in temperature. This indicates that, in warm soil, shallow sowing is necessary for satisfactory wheat establishment. Fluctuating temperatures (� 5�C about the mean) further reduced coleoptile length. The temperature x cultivar interaction was significant, differences among cultivars in coleoptile length occurring more at low than at high temperatures. The mean coleoptile lengths of the 8 cultivars varied from 8.7 to 14.5 cm at 15�C, but only from 2.7 to 3.6 cm at 35�C. Tall wheat cultivars (Gatcher and Spica) generally had longer coleoptiles than the 6 semidwarf cultivars. Tall wheats also had near-maximum coleoptile length at a wider range of temperatures than semidwarfs. Different environmental conditions during seed maturation (glasshouse v. field) changed the ranking of cultivars with respect to coleoptile length. The coleoptiles of Cook and Oxley were significantly longer when seed was field-ripened rather than glasshouse ripened, while those of Banks, Bass and Kite were similar in length under both ripening environments.

scholarly journals Effect of temperature on predation by Tasmanian lacewing larvae

2001 ◽  
Vol 54 ◽  
pp. 244-247 ◽  
Author(s):  
S.S. Islam ◽  
R.B. Chapman
Keyword(s):  
Larval Development ◽  
Laboratory Study ◽  
Consumption Rate ◽  
Effect Of Temperature ◽  
Fluctuating Temperature ◽  
Cabbage Aphid ◽  
Larval Behaviour ◽  
Temperature Regimes ◽  
Consumption Rates ◽  
Constant And Fluctuating Temperature

A laboratory study investigated the predation and development rates of Tasmanian lacewing larvae (Micromus tasmaniae) under constant and fluctuating temperature regimes Larval development and consumption of second instar cabbage aphid (Brevicoryne brassicae) increased linearly with constant temperatures between 1030C Under fluctuating daily temperatures (1025C) development and consumption rates were equivalent to those found at a constant 25C Larvae consumed more aphids during later instars and a maximum consumption rate of approximately 10 aphids per day was recorded Some aspects of larval behaviour are described

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