A STRAIN OF THE EUROPEAN RED MITE, PANONYCHUS ULMI (KOCH) (ACARINA: TETRANYCHIDAE), RESISTANT TO OVEX IN SOUTHWESTERN ONTARIO

1960 ◽  
Vol 40 (3) ◽  
pp. 542-545
Author(s):  
W. H. Foott
Keyword(s):  
Resistant Strain ◽  
Panonychus Ulmi ◽  
European Red Mite ◽  
Cent Level

A strain of the European red mite resistant to ovex was indicated after the chemical had been used 7 years against the mite on apple. In the laboratory, hatchability of ovex-treated eggs of mites taken from the ovex-sprayed trees was significantly higher at the 1 per cent level than that of similarly treated eggs of mites taken from trees that had never been sprayed with ovex. Decreases in percentage hatch associated with increases in concentration of ovex were not sufficient to warrant attempts to control the resistant strain by increasing the rate of the chemical.

COMPARISONS BETWEEN AN EXOTIC AND AN ENDEMIC PHYTOSEIID MITE PREDATOR (ACARINA: PHYTOSEIIDAE) IN BRITISH COLUMBIA

1974 ◽  
Vol 106 (7) ◽  
pp. 773-776 ◽  
Author(s):  
R. S. Downing ◽  
T. K. Moilliet
Keyword(s):  
British Columbia ◽  
Resistant Strain ◽  
Panonychus Ulmi ◽  
Phytoseiid Mite ◽  
Population Densities ◽  
Amblyseius Fallacis ◽  
European Red Mite ◽  
Mite Predator ◽  
Phytoseiid Predator

AbstractIn 1972, an organophosphate resistant strain of the phytoseiid predator Amblyseius fallacis (Garman) from Michigan compared favourably with the endemic Typhlodromus occidentalis Nesbitt, from Summerland, B.C., in laboratory and greenhouse trials against European red mite, Panonychus ulmi (Koch), and was later released into an orchard. By August 1972, A. fallacis had decreased whereas population densities of T. occidentalis increased. Examination of leaves and bark from the trees, and weeds, grass, and litter beneath the trees in 1973 confirmed that A. fallacis failed to survive in the Okanagan environment.

Quinoxalines as Orchard Acaricides in British Columbia

1966 ◽  
Vol 98 (2) ◽  
pp. 134-138 ◽  
Author(s):  
R. S. Downing
Keyword(s):  
Active Ingredient ◽  
Resistant Strain ◽  
Spider Mite ◽  
High Volume ◽  
Panonychus Ulmi ◽  
Phytoseiid Mite ◽  
Bud Development ◽  
European Red Mite ◽  
Excellent Control ◽  
Selection Of

AbstractThe quinoxalines, Eradex and Morestan, were found to be very effective miticides in laboratory and orchard experiments with the latter the most toxic. Applied at the pink stage of apple bud development Eradex and Morestan gave excellent control of European red mite, Panonychus ulmi (Koch), and delayed the build-up of the apple rust mite, Vasates schlechtendali (Nal.), and the McDaniel spider mite, Tetranychus mcdanieli McG. Both miticides were also very effective when applied in summer. The rates of use for Morestan were established at 8 to 16 ounces of active ingredient per acre in concentrate sprayers and at 2 ounces per 100 gallons in handgun sprayers and at twice these rates for Eradex. Where Eradex or Morestan were the only miticides used in an orchard for four years, the control of the European red mite and the McDaniel spider mite was excellent, an indication that selection of a resistant strain had not occurred. Morestan was highly toxic to the predaceous phytoseiid mite, Neoseiulus caudiglans (Schuster). Morestan has not injured fruit or foliage when applied at the pink bud stage but has marked fruit when applied in summer especially when applied by high-volume handgun sprayer.

scholarly journals Pathogenicity of Isaria fumosorosea to European red mite in the laboratory

Biotemas ◽  
2017 ◽  
Vol 30 (1) ◽  
pp. 73
Author(s):  
Cláudia Andréia Gräff ◽  
Liana Johann ◽  
Cláucia Fernanda Volken de Souza ◽  
Noeli Juarez Ferla
Keyword(s):  
Rio Grande ◽  
Panonychus Ulmi ◽  
Rio Grande Do Sul ◽  
Isaria Fumosorosea ◽  
European Red Mite

http://dx.doi.org/10.5007/2175-7925.2017v30n1p73A vitivinicultura no estado do Rio Grande do Sul tem sofrido infestações significativas de ácaros praga, destacando-se recentemente Panonychus ulmi (Koch). Há relatos sobre a capacidade de controle de ácaros fitófagos com Isaria fumosorosea. O objetivo deste trabalho foi avaliar em laboratório a ação patogênica de I. fumosorosea sobre o ácaro P. ulmi. As criações de P. ulmi foram estabelecidas a partir de coleta realizadas em videiras da Serra Gaúcha. Sobre os ovos de P. ulmi, as aplicações de suspensões de esporos foram feitas em diferentes concentrações. As triplicatas das fêmeas de 12 a 15 dias foram tratadas com suspensão a 108 esporos x mL-1. As testemunhas foram tratadas com água destilada. Após sete dias da aplicação, observaram-se 55,6% de ovos não eclodidos tratados com suspensão 106 esporos x mL-1 e com fêmeas tratadas obteve-se uma mortalidade total entre 85-90% e mortalidade confirmada entre 50-55%. A mortalidade máxima dos controles no tratamento dos ovos e das fêmeas foi, em média, de 12,8 e 15,5%, respectivamente. Conclui-se que o isolado I. fumosorosea possui habilidade para infectar ovos e fêmeas adultas de P. ulmi e portanto mostra-se como uma alternativa viável para ser experimentada no campo.

Polybutenes in Orchard Pest Control

1962 ◽  
Vol 94 (11) ◽  
pp. 1222-1227 ◽  
Author(s):  
R. S. Downing
Keyword(s):  
British Columbia ◽  
Pest Control ◽  
Spider Mite ◽  
Panonychus Ulmi ◽  
Phytophagous Mites ◽  
European Red Mite ◽  
Short Time ◽  
Methods Of Control

In British Columbia the control of phytophagous mites, especially the European red mite, Panonychus ulmi (Koch), and the McDaniel spider mite, Tetranychus mcdanieli McG., is becoming increasingly difficult, mainly because of the mites' ability to develop resistance to most acaricides in a relatively short time (3). Because of this, methods of control other than strictly chemical are examined at every opportunity.

EFFECTS OF SEVIN ON PHYTOPHAGOUS MITES AND PREDATORS IN AN ONTARIO PEACH ORCHARD

1960 ◽  
Vol 40 (1) ◽  
pp. 198-201 ◽  
Author(s):  
Wm. L. Putman ◽  
D. C. Herne
Keyword(s):  
Panonychus Ulmi ◽  
Predacious Mite ◽  
Phytophagous Mites ◽  
European Red Mite ◽  
Peach Trees ◽  
Peach Orchard ◽  
Stethorus Punctillum

Numbers of the European red mite (Panonychus ulmi Koch) increased but those of the brown mite (Bryobia arborea Morgan & Anderson) and the peach silver mite (Vasates cornutus Banks) decreased after sprays of Sevin (N-methyl-1-naphthyl carbamate) were applied to peach trees. Sevin practically eliminated the predacious mite Typhlodromus rhenanus Oudms., and larvae and pupae of Stethorus punctillum Weise, and greatly reduced the numbers of adults of S. punctillum, chrysopid larvae, and spiders.

scholarly journals Characterization of abamectin resistance in Iranian populations of European red mite, Panonychus ulmi Koch (Acari: Tetranychidae)

2019 ◽  
Vol 125 ◽  
pp. 104903 ◽  
Author(s):  
Fariborz Rameshgar ◽  
Jahangir Khajehali ◽  
Ralf Nauen ◽  
Wannes Dermauw ◽  
Thomas Van Leeuwen
Keyword(s):  
Panonychus Ulmi ◽  
European Red Mite ◽  
Iranian Populations

SAMPLING SYSTEMS FOR EUROPEAN RED MITE, PANONYCHUS ULMI (ACARINA: TETRANYCHIDAE), EGGS ON APPLE IN NOVA SCOTIA

1973 ◽  
Vol 105 (12) ◽  
pp. 1519-1523 ◽  
Author(s):  
H. J. Herbert ◽  
K. P. Butler
Keyword(s):  
Nova Scotia ◽  
Apple Orchard ◽  
Panonychus Ulmi ◽  
Population Estimates ◽  
Population Densities ◽  
European Red Mite ◽  
Tree Population ◽  
Sampling Systems ◽  
Mature Apple ◽  
Whole Tree

AbstractA study was conducted in a mature apple orchard in Nova Scotia to compare the density of eggs of the European red mite, Panonychus ulmi (Koch), over the whole tree to their density on a selected area using a random selection and standard selection technique. Both methods provided nearly equivalent estimates of population densities for generations 2 and 4 but not for generation 3. The population estimates based on sampling from the selected area overestimated the whole tree population.Optimum allocation of sampling resources may be obtained by sampling a small number of clusters from each of a large number of trees.

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