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Topic

Aphid

About: Aphid is a research topic. Over the lifetime, 11380 publications have been published within this topic receiving 229721 citations. The topic is also known as: Aphidoidea & plant lice.


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MonographDOI
01 May 2008
TL;DR: Flower flies (also known as syrphids or hoverflies) are effective predators against aphids in California vegetable fields and learn to recognize these aphid eaters and encourage them to help with pest management.
Abstract: Author(s): Bugg, Robert L; Colfer, Ramy G; Chaney, William E; Smith, Hugh A; Cannon, James | Abstract: Flower flies (also known as syrphids or hoverflies) are effective predators against aphids in California vegetable fields. Learn to recognize these aphid eaters and encourage them to help with your pest management. This publication describes syrphid flies and other natural enemies of aphids. It includes color photographs of the syrphid adults and larvae commonly seen in California vegetable crops.

75 citations

Journal ArticleDOI
TL;DR: Two field experiments were conducted to test the hypothesis that the intensity of predation by a generalist predator on two species of prey changes with the developmental stage of the predator.
Abstract: 1. Two field experiments were conducted to test the hypothesis that the intensity of predation by a generalist predator on two species of prey changes with the developmental stage of the predator. The generalist predator studied was Zelus renardii Kolenati (Hemiptera: Reduviidae) and the prey were the lacewing larva, Chrysoperla carnea Stephens, and the cotton aphid, Aphis gossypii Glover. 2. Zelus renardii and lacewings feed on aphids, thereby acting as potential competitors. In addition, Z. renardii feeds on lacewings. Thus, Z. renardii is an intraguild predator of lacewings. 3. Zelus renardii exhibited changes in prey preferences across developmental stages. The older stages of Z. renardii exerted greater mortality on lacewings and fed on larger lacewing larvae than did the younger stages. 4. Lacewings suppressed aphid population growth strongly. In contrast, none of the stages of Z. renardii was an effective control agent of the cotton aphid. 5. The addition of Z. renardii frequently disrupted the effective control of aphids generated by lacewings. In one of the two replicates of the experiment, the disruption increased with the developmental stage of Z. renardii, paralleling the increase in lacewing mortality. 6. Although the developmental stage of Z. renardii can influence the prevalence of intraguild predation and the intensity of the disruption of the aphid biological control, these experiments have demonstrated that even the youngest instars of Z. renardii can cause substantial lacewing mortality and release aphid populations from regulation.

75 citations

Journal ArticleDOI
TL;DR: Results indicate that Rme1 does not play a general role in disease resistance but may be specific for Mi-1-mediated resistance, and the response against Fusarium oxysporum f.sp.
Abstract: The tomato Mi-1 gene confers resistance against root-knot nematodes (Meloidogyne spp.) and a biotype of the potato aphid (Macrosiphum euphorbiae). Four mutagenized Mi-1/Mi-1 tomato populations were generated and screened for altered root-knot nematode resistance. Four independent mutants belonging to two phenotypic classes were isolated. One mutant was chosen for further analyzes; rme1 (for resistance to Meloidogyne) exhibited levels of infection comparable with those found on susceptible controls. Molecular and genetic data confirmed that rme1 has a single recessive mutation in a locus different from Mi-1. Cross-sections through galls formed by feeding nematodes on rme1 roots were identical to sections from galls of susceptible tomato roots. In addition to nematode susceptibility, infestation of rme1 plants with the potato aphid showed that this mutation also abolished aphid resistance. To determine whether Rme1 functions in a general disease-resistance pathway, the response against Fusarium oxysporum f.sp. lycopersici race 2, mediated by the I-2 resistance gene, was studied. Both rme1 and the wild type plants were equally resistant to the fungal pathogen. These results indicate that Rme1 does not play a general role in disease resistance but may be specific for Mi-1-mediated resistance.

75 citations

Journal ArticleDOI
TL;DR: Host choice by Monoctonus paulensis was qualitatively the same as host order based on estimated fitness returns, and A. pisum was the “best” host in terms of successful oviposition, eclosion from mummies, and offspring sex ratio.

75 citations


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Performance
Metrics
No. of papers in the topic in previous years
YearPapers
2023387
20221,082
2021337
2020393
2019373
2018382