Results 181 to 190 of about 6,659 (211)
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Sexual morph determination in the aphid, Acyrthosiphon pisum
Journal of Insect Physiology, 1972Abstract The effects of two temperatures and a series of photoperiods on sexual morph determination in an aphid are examined. Photoperiodic response curves are presented and analysed. Female morph determination and male production were influenced by both these environmental factors.
R.J. Lamb, P.J. Pointing
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Botanical products in Acyrthosiphon pisum (Harris) management in Pisum sativum L.
Journal of Environmental Science and Health, Part B, 2022Botanical products have an important role in the development of sustainable and ecologically friendly agriculture. Therefore, this study is focused on assessing the insecticidal activity of botanical products (Pyrethro Natura and Rapax) applied individually and in combination with an organic fertilizer (Fitasio) against Acyrthosiphon pisum. Further the
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Insulin-like peptides involved in photoperiodism in the aphid Acyrthosiphon pisum
Insect Biochemistry and Molecular Biology, 2019Aphids were the first animals reported as photoperiodic as their life cycles are strongly determined by the photoperiod. During the favourable seasons (characterised by long days) aphid populations consist exclusively of viviparous parthenogenetic females (known as virginoparae).
Miquel, Barberà +2 more
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Extraordinary proliferation of microorganisms in aposymbiotic pea aphids, Acyrthosiphon pisum
Journal of Invertebrate Pathology, 2003Aposymbiotic pea aphids, which were deprived of their intracellular symbiotic bacterium, Buchnera, exhibit growth retardation and no fecundity. High performance liquid chromatographic (HPLC) analysis revealed that these aposymbiotic aphids, when reared on broad bean plants, accumulated a large amount of histamine.
Atsushi, Nakabachi +2 more
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Effects of antibiotics on intracellular symbiotes in the pea aphid, Acyrthosiphon pisum
Cell and Tissue Research, 1974The effects of penicillin and chlortetracyline HCl on the fine structure of the intracellular symbiotes of the pea aphid were studied in an attempt to remove the symbiote population. High penicillin concentrations, 1% and 0.1%, caused symbiote breakdown but were toxic and/or repellent to the aphids; at 0.1% specific effects were observed on the ...
G W, Griffiths, S D, Beck
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Acyrthosiphon pisum (pea aphid).
2021Abstract A. pisum is a major pest of pea, lucerne and clover. Severe damage can occur to peas due to direct feeding and virus spread. Direct feeding on pea results in sap being removed from terminal leaves and the stem. Heavy infestations on pea can cause stunting, deformation, wilting and even death.
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Characterization of a Facultative Endosymbiotic Bacterium of the Pea Aphid Acyrthosiphon pisum
Microbial Ecology, 2005The pea aphid U-type symbiont (PAUS) was investigated to characterize its microbiological properties. Fluorescence in situ hybridization (FISH) and electron microscopy revealed that PAUS was a rod-shaped bacterium found in three different locations in the body of the pea aphid Acyrthosiphon pisum: sheath cells, secondary mycetocytes, and hemolymph ...
T, Tsuchida +4 more
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Functional characterization of the adipokinetic hormone in the pea aphid, Acyrthosiphon pisum
Comparative Biochemistry and Physiology Part A: Molecular & Integrative Physiology, 2012Aphids are important plant phloem-sucking pests and detailed knowledge about the hormonal control of their metabolism can potentially contribute to the development of methods for their management. The insect metabolism is predominantly controlled by neuropeptides belonging to the adipokinetic hormone/red pigment-concentrating hormone family (AKH/RPCH).
P, Jedlička +3 more
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AGGREGATION BEHAVIOR OF PEA APHIDS, ACYRTHOSIPHON PISUM
Entomologia Experimentalis et Applicata, 1967First and second instar pea aphid nymphs were allowed to respond in multiple choice test chambers having five parafilm feeding stations, each of which contained 20% sucrose solution. Under light conditions, the aphids assumed a negative bionomial distribution. This same phenomenon occurred in darkness, but with a lesser degree of aggregation.
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Acyrthosiphon pisum . [Distribution map].
Distribution Maps of Plant Pests, 2005Abstract A new distribution map is provided for Acyrthosiphon pisum (Harris) ( Macrosiphum pisum (Harris), M. onobrychis (Boy.)) (Hemipt., Aphididae) (Pea Aphis). Host Plants: Pea, beans and other legumes. A vector of virus diseases.
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