scholarly journals The Developmental Stage Symbionts of the Pea Aphid-Feeding Chrysoperla sinica (Tjeder)

2019 ◽  
Vol 10 ◽  
Author(s):  
Chenchen Zhao ◽  
Hui Zhao ◽  
Shuai Zhang ◽  
Junyu Luo ◽  
Xiangzhen Zhu ◽  
...  
Keyword(s):  
Developmental Stage ◽  
Pea Aphid ◽  
Aphid Feeding

SEASONAL OCCURRENCE OF THE PEA APHID, ACYRTHOSIPHON PISUM (HARRIS) (HOMOPTERA: APHIDIDAE), ON CULTIVARS OF FIELD PEAS IN MANITOBA AND ITS EFFECTS ON PEA GROWTH AND YIELD

1990 ◽  
Vol 122 (3) ◽  
pp. 503-513 ◽  
Author(s):  
J.J. Soroka ◽  
P.A. Mackay
Keyword(s):  
Seed Weight ◽  
Acyrthosiphon Pisum ◽  
Regression Line ◽  
Pea Aphid ◽  
Aphid Population ◽  
Growth And Yield ◽  
Field Peas ◽  
Aphid Feeding ◽  
One Year ◽  
Yield Responses

AbstractPopulations of pea aphid, Acyrthosiphon pisum (Harris), were sampled through the summer of 1984 on five cultivars and in 1985 and 1986 on six cultivars of field peas, Pisum sativum L., grown in field plots in southern Manitoba. Patterns of pea aphid population growth were generally similar among cultivars in any one year. Aphid populations on all cultivars in all years remained relatively low until mid-July, then increased rapidly, peaked at about the beginning of August, and declined sharply to low levels in late August. At the time of peak aphid numbers, significant differences in aphid population densities were found among cultivars in 2 years; the lowest densities were found on the cultivars Century and Tipu, and the highest densities on Triumph or Trapper. Pea aphid feeding was not detrimental to any yield parameters except 1000 seed weight. In 1984 Triumph and Tara, and in 1985 Triumph had significantly decreased 1000 seed weights in plots in which aphid densities were not controlled. Differences in the abundance of the aphid among cultivars were not reflected in their yield responses. Over 3 years the regression line of aphid densities upon Century seed weight was significantly steeper than those of Trapper, Lenca, or Tara. Trapper was least affected by aphid feeding. Results indicated that the economic threshold of pea aphids on peas other than Century needs to be re-evaluated.

Recent Advances in the Feeding and Nutrition of Aphids

1964 ◽  
Vol 96 (1-2) ◽  
pp. 241-249 ◽  
Author(s):  
J. L. Auclair
Keyword(s):  
Amino Acid ◽  
Digestive Enzymes ◽  
Host Plants ◽  
Artificial Feeding ◽  
Pea Aphid ◽  
Nutritional Requirements ◽  
Feeding Method ◽  
Recent Developments ◽  
Aphid Feeding ◽  
Successive Generations

AbstractSome recent developments on aphid digestive enzymes, aphid feeding and nutrition on host-plants, and on artificial media are briefly reviewed. A chemically defined diet, on which pea aphid life and reproduction can be sustained during two successive generations, is described. An important feature of this successful chemical diet concerns its amino acid composition, which was based on that of pea aphid blood and honeydew. An artificial feeding method for aphids divorced from their host-plants should prove a valuable tool in the study of the nutritional requirements and the intermediary metabolism of these insects, as well as in determining the influence of dietary constituents on polymorphism and in relation to the phenomena of plant resistance to aphids.

Acceptance of low-saponin lines of alfalfa with varied phenolic concentrations by pea aphid (Homoptera: Aphididae)

Biologia ◽  
2009 ◽  
Vol 64 (2) ◽  
Author(s):  
Sylwia Goławska ◽  
Iwona Łukasik
Keyword(s):  
Feeding Behaviour ◽  
Acyrthosiphon Pisum ◽  
Rank Correlation ◽  
Pea Aphid ◽  
Spearman Rank Correlation ◽  
Peripheral Tissues ◽  
Phloem Sap ◽  
Reproduction Period ◽  
Aphid Feeding ◽  
Low Levels

AbstractThis research aims to examine the effect of phenolics on pea aphid (Acyrthosiphon pisum) (Homoptera: Aphididae) development and feeding behaviour, on leaves of selected low-saponin lines of Radius alfalfa (Medicago sativa). There was a slight, negative correlation (Spearman rank correlation r s = −0.80) between concentrations of saponins and phenols. Lines with higher concentrations of saponins had less phenolics. Levels of phenolics in low-saponin lines of alfalfa cv. Radius were related to their acceptance by the pea aphid. Our data revealed an inverse relationship between level of phenolics and the aphid abundance and its biology on studied alfalfa lines. Larval development of the pea aphid was longer, reproduction period was shorter, and the fecundity was lower on low-saponin lines with higher level of phenolics. There were observed some tendencies in the pea aphid feeding behaviour on these lines: prolonging the probing of the peripheral tissues (epidermis and mesophyll) and shortening the period of phloem sap ingestion. The better hosts for the pea aphid were low-saponin lines with low levels of phenolic compounds.

INTER- AND INTRASPECIFIC LARVAL COMPETITION IN APHIDIUS SMITHI AND PRAON PEQUODORUM (HYMENOPTERA: APHIDIIDAE)

1984 ◽  
Vol 116 (8) ◽  
pp. 1097-1107 ◽  
Author(s):  
F. J. Chow ◽  
M. Mackauer
Keyword(s):  
Embryonic Development ◽  
Developmental Stage ◽  
Interspecific Competition ◽  
Intraspecific Competition ◽  
Acyrthosiphon Pisum ◽  
Pea Aphid ◽  
Age Difference ◽  
Larval Competition ◽  
Relative Age ◽  
Conspecific Female

AbstractSuperparasitism and multiple parasitism of the pea aphid, Acyrthosiphon pisum (Harris), by the solitary hymenopterous parasites Aphidius smithi Sharma & Subba Rao and Praon pequodorum Viereck were studied in the laboratory. In intraspecific competition, an older larva usually eliminated a younger one; exceptions to this rule depended on the relative age difference and developmental stage of the competitors. In interspecific competition, P. pequodorum was intrinsically superior to A. smithi, regardless of the latter's age. The stage of host parasitized and the number of competing larvae had no significant effect on the outcome of the contest. A. smithi females discriminated against aphids previously parasitized by a conspecific female or by P. pequodorum, the degree of oviposition restraint increasing with the time between ovipositions. P. pequodorum females attacked aphids already parasitized by A. smithi, regardless of the age of the Aphidius larva, but avoided oviposition when the aphid contained a Praon larva or embryo. The rate of embryonic development is shown as a major factor in contest-type competition between first-stage larvae.

Neural correlates of postformal stages of reasoning: Biological determinants of developmental stage.

2016 ◽  
Vol 21 (1) ◽  
pp. 33-43 ◽  
Author(s):  
Sofia Ribeirinho Leite ◽  
Cory David Barker ◽  
Marc G. Lucas
Keyword(s):  
Developmental Stage ◽  
Neural Correlates ◽  
Biological Determinants

Developmental stage-specific interplay between GATA1 and IGF signaling during fetal hematopoiesis and leukemogenesis

2009 ◽  
Vol 221 (03) ◽  
Author(s):  
JH Klusmann ◽  
FJ Godinho ◽  
K Heitmann ◽  
T Pushpanathan ◽  
D Reinhardt ◽  
...  
Keyword(s):  
Developmental Stage ◽  
Fetal Hematopoiesis ◽  
Igf Signaling
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