scholarly journals État actuel de la lutte biologique contre les acariens phytophages par des acariens prédateurs

2005 ◽  
Vol 74 (1) ◽  
pp. 41-49 ◽  
Author(s):  
M. Roy
Keyword(s):  
Tetranychus Urticae ◽  
Lutte Biologique ◽  
Panonychus Ulmi ◽  
Malus Pumila ◽  
Amblyseius Fallacis

Au Québec, la stratégie de lutte contre le tétranyque rouge du pommier (Panonychus ulmi) et le tétranyque à deux points (Tetranychus urticae) dans les vergers de pommier (Malus pumila) repose actuellement sur l'emploi d'acaricides coûteux. Par ailleurs, les consommateurs exigent de plus en plus des fruits exempts de pesticides. Dans ce contexte, l'utilisation de méthodes de lutte non chimiques suscite un grand intérêt auprès des pomiculteurs. Depuis plusieurs années, les efforts de recherche et les essais conduits aux États-Unis et en Europe ont donné un large essor à l'utilisation de souches d'acariens prédateurs résistants à certaines classes de pesticides. Au Québec, des expériences de lutte biologique avec l'acarien prédateur Amblyseius fallacis [Acarina: Phytoseiidae] ont été entreprises depuis quelques années. Cet article se propose d'exposer la problématique de la lutte contre les acariens nuisibles dans les vergers québécois ainsi que les perspectives d'avenir de l'utilisation de la lutte biologique contre ces ravageurs.

The Role of Predators and Other Biotic Agents in Regulating the Population Density of Phytophagous Mites in Ontario Peach Orchards

1966 ◽  
Vol 98 (8) ◽  
pp. 808-820 ◽  
Author(s):  
W. L. Putman ◽  
D. H. C. Herne
Keyword(s):  
Population Density ◽  
Population Growth ◽  
Tetranychus Urticae ◽  
Considerable Extent ◽  
Panonychus Ulmi ◽  
Apple Orchards ◽  
Rapid Population Growth ◽  
One Year ◽  
Heavy Mortality

AbstractMore than 40 species of insects and arachnids attack Panonychus ulmi (Koch), Tetranychus urticae Koch, T. canadensis (McGregor), Bryobia arborea Morgan and Anderson, or Aculus cornutus (Banks) in peach orchards of the Niagara Peninsula. The most effective predators attacking P. ulmi are Typhlodromus caudiglans Schuster, Haplothrips faurei Hood, Stethorus punctillum Weise, and Chrysopa spp. Peach orchards lack the predatory mirids characteristic of apple orchards. A condition, presumably disease, caused heavy mortality in one year. Endemic densities of P. ulmi are maintained in that state by predators, chiefly T. caudiglans, that subsist to a considerable extent on other sources of food, whereas epidemics of P. ulmi are reduced largely by other predators, chiefly H. faurei and S. punctillum, that increase in numbers by feeding on the mite during its period of rapid population growth but exert their greatest effect later in the season by destroying the winter eggs.

THE EGGS AND OVIPOSITION SITES OF DIAPHNIDIA CAPITATA (HEMIPTERA: MIRIDAE) ON APPLE TREES

1970 ◽  
Vol 102 (10) ◽  
pp. 1316-1319 ◽  
Author(s):  
R. L. Horsburgh ◽  
Dean Asquith
Keyword(s):  
Tetranychus Urticae ◽  
Spider Mites ◽  
Panonychus Ulmi ◽  
Apple Trees ◽  
Oviposition Sites

AbstractNymphal and adult Diaphnidia capitata (Van Duzee) have long been recognized as predators of Panonychus ulmi (Koch) and Tetranychus urticae Koch. The eggs and oviposition sites preferred by this species are described herein to supplement available descriptions of the eggs of mirid predators of spider mites.

Species Dominance of Tetranychus urticae and Panonychus ulmi (Acari: Tetranychidae) in Apple Orchards in the Southern part of Korea

2014 ◽  
Vol 53 (4) ◽  
pp. 415-425 ◽  
Author(s):  
Kyung-Hee Choi ◽  
◽  
Dong-Hyuk Lee ◽  
Soon-Won Lee ◽  
Changmann Yoon ◽  
...  
Keyword(s):  
Tetranychus Urticae ◽  
Panonychus Ulmi ◽  
Apple Orchards ◽  
Species Dominance

scholarly journals Localização de presas à curta distância por Neoseiulus californicus (McGregor) (Acari: Phytoseiidae): o papel dos aleloquímicos dos ácaros fitófagos Panonychus ulmi (Koch) e Tetranychus urticae Koch (Acari: Tetranychidae) e da planta hospedeira, Malus domestica (Borkham)

2000 ◽  
Vol 29 (4) ◽  
pp. 705-713 ◽  
Author(s):  
Karin F.S. Collier ◽  
Álvaro E. Eiras ◽  
Gilberto S. Albuquerque ◽  
Jacquelyn L. Blackmer ◽  
Marilaine C. Araújo ◽  
...  
Keyword(s):  
Tetranychus Urticae ◽  
Malus Domestica ◽  
Panonychus Ulmi ◽  
Neoseiulus Californicus ◽  
Tetranychus Urticae Koch

Para conhecer os estímulos olfativos à curta distância que Neoseiulus californicus (McGregor) usa para encontrar seu alimento, isto é, os ácaros fitófagos Panonychus ulmi (Koch) e Tetranychus urticae Koch, estudaram-se as respostas deste ácaro predador em relação aos aleloquímicos voláteis oriundos tanto das duas espécies de presa como de sua planta hospedeira, Malus domestica (Borkham). Na extremidade de um braço da trilha em Y foi introduzido um disco de folha sadia de macieira (= controle) e na outra um dos oito tipos de estímulo (= tratamento) seguintes: 1) folha sadia, 2) folha sadia com a presa, 3) folha sadia com cairomônios da presa, 4) folha sadia com a presa e seus cairomônios, 5) folha atacada limpa, 6) folha atacada com a presa, 7) folha atacada com cairomônios da presa e 8) folha atacada com a presa e seus cairomônios. Para cada tratamento, observou-se a direção do deslocamento do ácaro predador e analisou-se sua porcentagem de resposta. Para localizar P. ulmi, N. californicus orientou-se pelos estímulos oriundos de folhas sadias com a presa e seus cairomônios (T4), folhas atacadas com cairomônios da presa (T7) e folhas atacadas com a presa e seus cairomônios (T8). Com relação a T. urticae, o ácaro predador respondeu significativamente aos estímulos oriundos de folhas sadias com cairomônios da presa (T3) e de folhas sadias com a presa e seus cairomônios (T4), assim como de todas as combinações com folhas atacadas (T5-8). Estes resultados demonstram que os voláteis emanados pelos ácaros fitófagos, por seus subprodutos e pela planta por eles atacada, em conjunto ou isoladamente, são importantes fontes de informação para N. californicus localizar T. urticae à curta distância. Por outro lado, somente a combinação de dois ou mais estímulos olfativos parece sinalizar a localização de P. ulmi para o ácaro predador, principalmente se os cairomônios de suas fezes, ovos e exúvias estiveram incluídos em tal mistura.

Prey consumption in acarine predator-prey populations reared in the greenhouse

1971 ◽  
Vol 49 (6) ◽  
pp. 903-913 ◽  
Author(s):  
T. Burnett
Keyword(s):  
Tetranychus Urticae ◽  
Natural Enemy ◽  
Prey Density ◽  
Prey Consumption ◽  
Predator Prey ◽  
Amblyseius Fallacis ◽  
Two Factors ◽  
Prey Populations

Two factors, in addition to temperature, could affect the assessment of Amblyseius fallacis as a natural enemy of Tetranychus urticae infesting alfalfa. These are initial prey density and sampling of the predator–prey populations during daylight hours. The influence of these factors was determined by propagating predator–prey populations having different initial prey densities on alfalfa in the greenhouse, recording the subsequent variation in the numbers of the two species during daylight hours, and comparing estimates of the rates at which prey entered and were removed from the populations. A. fallacis was able to reduce prey density before webbing of the alfalfa plants occurred. Prey consumption by the predator populations was judged capable of inducing the observed decline in prey numbers.

Effect of temperature on a greenhouse acarine predator–prey population

1970 ◽  
Vol 48 (3) ◽  
pp. 555-562 ◽  
Author(s):  
T. Burnett
Keyword(s):  
Tetranychus Urticae ◽  
Age Structure ◽  
The Other ◽  
Prey Abundance ◽  
Prey Population ◽  
Effect Of Temperature ◽  
Initial Increase ◽  
Predator Population ◽  
Predator Prey ◽  
Amblyseius Fallacis

Populations of the two-spotted mite, Tetranychus urticae, and its acarine predator, Amblyseius fallacis, were propagated on alfalfa in the greenhouse at constant temperatures in the range 65 to 85 °F (18.3–29.4 °C). The predator limited the initial increase in prey abundance only at temperatures above about 70 °F (21.1 °C). At 80 and 85 °F (26.7 and 29.4 °C) fluctuations in prey and predator numbers increased in amplitude as propagation continued. The age structure of the predator population reared at 75 °F (23.9 °C) differed from that of populations propagated at the other temperatures.

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