Development rate, fecundity and lifespan of apterae of the Russian wheat aphid, Diuraphis noxia (Mordvilko) (Hemiptera: Aphididae), under controlled conditions

1987 ◽  
Vol 77 (4) ◽  
pp. 629-635 ◽  
Author(s):  
Y. K. Aalbersberg ◽  
F. Du Toit ◽  
M. C. Van Der Westhuizen ◽  
P. H. Hewitt
Keyword(s):  
Russian Wheat Aphid ◽  
Diuraphis Noxia ◽  
Development Rate ◽  
Rate Of Development ◽  
Complete Development ◽  
Controlled Conditions ◽  
Time Required

AbstractThe rate of development, fecundity and lifespan of apterae of Diuraphis noxia (Mordvilko) were determined at five sets of temperature and daylength conditions. The time required to complete pre-imaginal growth at mean daily temperatures of 10, 13, 14, 17·25 and 20°C was 19·70, 12·09, 11·25, 9·88 and 8·17 days, respectively. The threshold for development was estimated to be 0·54°C and the number of day-degrees C required to complete development was 158·73.

RATE OF DEVELOPMENT, REPRODUCTION, AND MASS-REARING OF APANTELES FUMIFERANAE VIER. (HYMENOPTERA: BRACONIDAE) UNDER CONTROLLED CONDITIONS

1988 ◽  
Vol 120 (3) ◽  
pp. 197-204 ◽  
Author(s):  
V.G. Nealis ◽  
S. Fraser
Keyword(s):  
Mass Rearing ◽  
Light Conditions ◽  
Degree Days ◽  
Temperature Dependent ◽  
Rate Of Development ◽  
Complete Development ◽  
Dependent Rate ◽  
Controlled Conditions ◽  
Daily Rate ◽  
Adult Wasp

AbstractThe temperature-dependent rate of development of the post-diapause larval and pupal stages of the spruce budworm parasitoid, Apanteles fumiferanae Vier., was estimated under controlled conditions. Parasitoid larvae required 289.0 degree-days (DD) above a threshold of 8.1 °C to complete development and the pupae required 106.2 DD above a threshold of 9.6 °C to complete development. Longevity of the adult wasp at several temperatures also was examined. Female wasps lived longer than male wasps at all temperatures. Wasps tended to mate more readily under natural than under artificial light conditions.Newly emerged female A. fumiferanae had few, if any, mature eggs in their ovaries. The number of mature eggs increased to a peak of 40–75 eggs, 4–12 days after eclosion of the adult. The pattern in number of ovipositions was similar to this pattern of egg availability. The daily rate of oviposition, however, was only about one-quarter the number of eggs available.These biological measurements are discussed in view of the development of a mass-rearing technique for this parasitoid.

The Effect of Temperature on the Growth and Respiration of Fish Embryos (Salmo Fario)

1932 ◽  
Vol 9 (3) ◽  
pp. 271-276
Author(s):  
A. H. WOOD
Keyword(s):  
Growth Rate ◽  
Oxygen Consumption ◽  
Relative Intensity ◽  
Maximum Growth ◽  
Maximum Growth Rate ◽  
Effect Of Temperature ◽  
Total Oxygen ◽  
Average Efficiency ◽  
Complete Development ◽  
Time Required

1. The rate of respiration (as expressed in c.c. O2 per gram embryo per hour) of the embryos of Salmo fario remains constant at any given temperature until the embryo has reached its maximum growth-rate, after this point it declines. It is suggested that the rate of respiration may be proportional to the amount of available yolk. 2. When incubated at 7° C. the time required to complete development after hatching was 58 days and the total oxygen consumed by an average embryo during this period was 20·31 c.c. (N.T.P.). At 12° the time required for the completion of development was reduced to 27 days, but the oxygen consumption remained practically unchanged at 20·71 c.c. At 3° C. the time required for development was 108 days and the oxygen consumption was 26·96 c.c. per embryo. 3. At 7 and 12° C. the efficiency of development was found to be identical with the value given by Gray for 11·5° C., viz. 63 per cent.; at 3°C. the average efficiency over the period considered was only 54 per cent. 4. It is suggested that, between the limits of temperature to which a trout egg is normally exposed, the effect of temperature on respiration is neither greater nor less than its effect on the growth-rate; possibly both processes are dependent on the same controlling factor. Above and below this range of temperature, the relative intensity of the respiratory processes (to those of growth) is increased, and a smaller embryo is the final result of incubation.

Diuraphis noxia (Kurdjumov), Russian wheat aphid (Homoptera: Aphididae).

2009 ◽  
pp. 110-114
Author(s):  
O. O. Olfert ◽  
J. F. Doane ◽  
K. Carl ◽  
M. A. Erlandson ◽  
M. S. Goettel
Keyword(s):  
Russian Wheat Aphid ◽  
Diuraphis Noxia

Biotypic and Genetic Variation Within Tropical Populations of Russian Wheat Aphid, Diuraphis noxia (Kurdjumov) (Homoptera: Aphididae) in Kenya

2007 ◽  
Vol 4 (5) ◽  
pp. 350-361 ◽  
Author(s):  
J.N. Malinga ◽  
M.G. Kinyua . ◽  
A.W. Kamau . ◽  
J.K. Wanjama . ◽  
J.O. Awalla . ◽  
...  
Keyword(s):  
Genetic Variation ◽  
Russian Wheat Aphid ◽  
Diuraphis Noxia

Pathogenicity of Beauveria bassiana (Hypocreales: Cordycipitaceae) against the Russian Wheat Aphid, Diuraphis noxia (Hemiptera: Aphididae)

2020 ◽  
Vol 28 (2) ◽  
Author(s):  
L.F. Motholo ◽  
M. Booyse ◽  
J.L. Hatting ◽  
T.J. Tsilo ◽  
O.M.M. Thekisoe
Keyword(s):  
Beauveria Bassiana ◽  
Russian Wheat Aphid ◽  
Diuraphis Noxia
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