scholarly journals Population Dynamics of Cacopsylla melanoneura (Hemiptera: Psyllidae) in Northeast Italy and Its Role in the Apple Proliferation Epidemiology in Apple Orchards

2012 ◽  
Vol 105 (2) ◽  
pp. 322-328 ◽  
Author(s):  
Rosemarie Tedeschi ◽  
Mario Baldessari ◽  
Valerio Mazzoni ◽  
Federica Trona ◽  
Gino Angeli
Keyword(s):  
Population Dynamics ◽  
Apple Orchards ◽  
Apple Proliferation ◽  
Cacopsylla Melanoneura

scholarly journals Surveying Potential Vectors of Apple Proliferation Phytoplasma: Faunistic Analysis and Infection Status of Selected Auchenorrhyncha Species

Insects ◽  
2020 ◽  
Vol 12 (1) ◽  
pp. 12
Author(s):  
Stefanie Fischnaller ◽  
Martin Parth ◽  
Manuel Messner ◽  
Robert Stocker ◽  
Christine Kerschbamer ◽  
...  
Keyword(s):  
New Records ◽  
Regional Scale ◽  
Insect Vectors ◽  
Infection Status ◽  
Apple Proliferation ◽  
Population Densities ◽  
South Tyrol ◽  
Candidatus Phytoplasma Mali ◽  
Cacopsylla Melanoneura

Apple proliferation (AP) is one of the economically most important diseases in European apple cultivation. The disease is caused by the cell-wall-less bacterium ’ Candidatus Phytoplasma mali’, which is transmitted by Cacopsylla picta (Foerster) and Cacopsylla melanoneura (Foerster) (Hemiptera: Psylloidea). In South Tyrol (Italy), severe outbreaks were documented since the 1990s. Infestation rates of AP do not always correlate with the population densities of the confirmed vectors, implying the presence of other, so far unknown, hemipterian vectors. By elucidating the species community of Auchenorrhyncha (Insecta: Hemiptera) at a regional scale, more than 31,000 specimens were captured in South Tyrolean apple orchards. The occurrence of 95 species was confirmed, whereas fourteen species are new records for this territory. Based on the faunistical data, more than 3600 individuals out of 25 species were analyzed using quantitative PCR to assess the presence of AP phytoplasma. The pathogen was sporadically detected in some individuals of different species, for example in Stictocephala bisonia Kopp and Yonk (Hemiptera: Membracidae). However, the concentration of phytoplasma was much lower than in infected C. picta and C. melanoneura captured in the same region, confirming the role of the latter mentioned psyllids as the main insect vectors of AP- phytoplasma in South Tyrol.

scholarly journals Population dynamics of Phytoseiids mite on apple orchards in southern Syria

2020 ◽  
Vol 38 (3) ◽  
pp. 258-265
Author(s):  
Jihan Al-Abdulla ◽  
◽  
Majida Mofleh ◽  
Luay Aslan ◽  
◽  
...  
Keyword(s):  
Population Dynamics ◽  
Apple Orchards

The Influence of Spray Programs on the Fauna of Apple Orchards in Nova Scotia. XI. Effects of Low Dosages of DDT on Predator Populations

1962 ◽  
Vol 94 (2) ◽  
pp. 204-216 ◽  
Author(s):  
F. T. Lord
Keyword(s):  
Population Dynamics ◽  
Nova Scotia ◽  
Prey Density ◽  
Apple Orchards ◽  
Laboratory Investigations

The varied interpretations by numerous biologists, of the role of predation in population dynamics have been critically reviewed by Holling (1959) and by Huffaker and Kennett (1956). They conclude that the processes of predation may serve to regulate prey density and disagree with generalizations that minimize the role of predation. This role has been a subject of considerable interest in recent years, notable contributions being the laboratory investigations of Collyer (1958) and Huffaker (1958), and the field studics of Holling (1959).

The Application of Ecological Principles to Orchard Entomology in Canada

1964 ◽  
Vol 96 (1-2) ◽  
pp. 348-356 ◽  
Author(s):  
E. J. LeRoux
Keyword(s):  
Population Dynamics ◽  
Precise Measurement ◽  
Natural Populations ◽  
Future Research ◽  
Pest Species ◽  
Apple Orchards ◽  
Mortality Factors ◽  
Ecological Principles ◽  
Insight Into

AbstractA knowledge of ecological principles is essential to the successful development of future research on pest control problems in Canadian orchard entomology. Such knowledge should be especially helpful in spotlighting omissions in past studies as well as indicating new areas of study in the future. In particular, the ecosystem concept should serve not only as a basis for evaluating and bringing together existing data but also as a guide in the collection, integration and interpretation of new data.Our approach should be to study the population dynamics of major arthropod pests in Canadian apple orchards to obtain data of the fundamental kind on natural populations of these species. Since this approach is dependent on precise measurement of the population and its mortality factors, as well as on the mathematical modelling of the data obtained, unambiguous deduction and greater understanding and utilization of the results would then be possible.Examples from a recent eight-year study of the population dynamics of two pest species in Canadian apple orchards reveal that the fundamental approach to pest problems in Canada is both feasible and practical, and that the results can yield considerable insight into the role of mortality factors in population regulation as well as in control of pest stages of economic importance.

THE OCCURRENCE OF HARMONIA AXYRIDIS (PALLAS) (COLEOPTERA: COCCINELLIDAE) IN CANADA

1995 ◽  
Vol 127 (4) ◽  
pp. 609-611 ◽  
Author(s):  
Daniel Coderre ◽  
Éric Lucas ◽  
Isabelle Gagné
Keyword(s):  
Population Dynamics ◽  
Harmonia Axyridis ◽  
Insect Pests ◽  
Apple Orchards ◽  
First Occurrence ◽  
Harmonia Axyridis Pallas

In a study on the population dynamics of the predators of insect pests in apple orchards of Quebec, three specimens of the Asian coccinellid Harmonia axyridis were found. This is the first occurrence of this species in Canada

Linking omics and ecology to dissect interactions between the apple proliferation phytoplasma and its psyllid vector Cacopsylla melanoneura

2020 ◽  
Vol 127 ◽  
pp. 103474
Author(s):  
Tobias Weil ◽  
Lino Ometto ◽  
Anna Esteve-Codina ◽  
Jèssica Gómez-Garrido ◽  
Tiziana Oppedisano ◽  
...  
Keyword(s):  
Apple Proliferation ◽  
Cacopsylla Melanoneura
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