scholarly journals Temperature dependent functional response of Diaeretiella rapae (Hymenoptera: Aphidiidae) to the cabbage aphid, Brevicoryne brassicae (Hemiptera: Aphididae)

2013 ◽  
Vol 110 (1) ◽  
pp. 109-113 ◽  
Author(s):  
Hamid R.S. MOAYERI ◽  
Hossein MADADI ◽  
Hossein POURASKARI ◽  
Annie ENKEGAARD
Keyword(s):  
Functional Response ◽  
Brevicoryne Brassicae ◽  
Diaeretiella Rapae ◽  
Temperature Dependent ◽  
Cabbage Aphid

scholarly journals Evaluation of the functional response of Chrysoperla carnea (Stephens) (Neuroptera:Chrysopidae) larvae feeding on cabbage aphid, Brevicoryne brassicae (L.)(Homoptera: Aphididae) in laboratory

2012 ◽  
Vol 9 (2) ◽  
pp. 220-228
Author(s):  
Baghdad Science Journal
Keyword(s):  
Functional Response ◽  
Attack Rate ◽  
Handling Time ◽  
Brevicoryne Brassicae ◽  
Chrysoperla Carnea ◽  
Nymphal Instar ◽  
Predator Satiation ◽  
Cabbage Aphid ◽  
The Stability ◽  
Type Ii Functional Response

This study evaluated the functional response of the larva of the predator Chrysoperla carnea by offering varying densities of cabbage aphid, Brevicoryne brassicae (L.) . Results showed conformity with type–II functional response, where the number of prey killed approaches asymptote hyperbolically as prey density increases (declining proportion of prey killed or the inverse density dependent) till it reached the stability stage determined by handling time and predator satiation. Also, the values of attack rate and handling time changed with age progress for both predator and prey. It has been observed an increase in the attack rate and reduction in handling time with the progress of the predator age when feeding on a particular nymphal instar. The attack rates of the predator was 1.779,3.406 and 4.219 ,while handling time was 0.015,0.010 and 0.008 (days) for 1st,2nd,3rd larval instars respectively, when fed on 1st nymphal instar. Also attack rates decreased and increases handling time with the progress in the prey. The attack rates were 1.779, 1.392, 1.096 and 1.059, due to an increase in size of the predator and in the growing efficiency in hunting the prey as well as in the increase in size of the prey and in developing its ability to defend itself and escape.

POPULATION DYNAMICS OF THE CABBAGE APHID, BREVICORYNE BRASSICAE (HOMOPTERA: APHIDIDAE) AT VANCOUVER, BRITISH COLUMBIA: V. A SIMULATION MODEL

1984 ◽  
Vol 116 (6) ◽  
pp. 895-911 ◽  
Author(s):  
D. A. Raworth
Keyword(s):  
British Columbia ◽  
Population Dynamics ◽  
Major Change ◽  
Brevicoryne Brassicae ◽  
Diaeretiella Rapae ◽  
Simulated Population ◽  
Aphidoletes Aphidimyza ◽  
Functional Responses ◽  
Cabbage Aphid ◽  
Effects Of Temperature

AbstractA computer model was written to simulate the population dynamics of the cabbage aphid, Brevicoryne brassicae (L.), on the host Maris Kestrel kale, Brassica oleracea L., at Vancouver, British Columbia. The model incorporated the effects of temperature, morph determination, plant quality, predators, parasites, and leaf fall. Comparisons of simulated results with field observations indicated that although B. brassicae, Aphidoletes aphidimyza (Rond.), and Diaeretiella rapae (M'Intosh) were reasonably well understood, syrphid predation was not, and appropriate feed-back mechanisms which could prevent monotonic increase or decrease in the simulated population were lacking. A detailed study in which the population dynamics of the prey is accounted for in terms of the numerical and functional responses of syrphid predators is necessary to understand the population dynamics of B. brassicae on Maris Kestrel kale at Vancouver. Comparisons with other aphid systems suggest that a major change in one component of the system can be compensated for by changes in other components. An overview of the cabbage aphid system at Vancouver is given.

REPRODUCTION AND LONGEVITY OF CABBAGE APHID, BREVICORYNE BRASSICAE (HOMOPTERA: APHIDIDAE), PARASITIZED BY DIAERETIELLA RAPAE (HYMENOPTERA: APHIDIIDAE)

1984 ◽  
Vol 116 (12) ◽  
pp. 1605-1610 ◽  
Author(s):  
M. Mackauer ◽  
S. Kambhampati
Keyword(s):  
Adult Stage ◽  
Variable Number ◽  
Reproductive Period ◽  
Brevicoryne Brassicae ◽  
Diaeretiella Rapae ◽  
Linear Regression Equation ◽  
Cabbage Aphid ◽  
Total Fecundity ◽  
The Mean ◽  
Cabbage Aphids

AbstractParasitized cabbage aphids, Brevicoryne brassicae (Linnaeus), produced fewer offspring than unparasitized aphids. Aphids parasitized by Diaeretiella rapae (M'Intosh) during the first, second, or third instar died before producing any offspring; those parasitized during the fourth instar or the adult stage produced a variable number of offspring. The aphid's survival time was correlated with the rate of development, as measured by the length of the pre-reproductive period. A multiple-linear-regression equation is provided for predicting the mean total fecundity of parasitized cabbage aphids from the host age at the beginning of parasitism and the pre-reproductive period.

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