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.

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.

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.

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.

Occurrence and Food of Some Coccinellids (Coleoptera) in Ontario Peach Orchards

1964 ◽  
Vol 96 (9) ◽  
pp. 1149-1155 ◽  
Author(s):  
Wm. L. Putman
Keyword(s):  
Myzus Persicae ◽  
Second Generation ◽  
Green Peach Aphid ◽  
Adalia Bipunctata ◽  
Panonychus Ulmi ◽  
Population Densities ◽  
European Red Mite

AbstractTen species of the larger, primarily aphidophagous, coccinellids were present in peach orchards of the Niagara Peninsula. Adalia bipunctata (L.) and Coccinella trifasciata perplexa Mulsant were the commonest. All were most numerous in the spring while the green peach aphid, Myzus persicae (Sulzer), was present but their population densities were low at all times, apparently because suitable prey was scarce. They were not attracted to dense populations of the European red mite, Panonychus ulmi (Koch), and were of no importance as predators of peach pests.At least 7 species were bivoltine but the second generation was only partial.

PLICTRAN AS AN ORCHARD ACARICIDE IN BRITISH COLUMBIA

1970 ◽  
Vol 102 (12) ◽  
pp. 1604-1607 ◽  
Author(s):  
R. S. Downing ◽  
T. K. Moilliet
Keyword(s):  
British Columbia ◽  
Panonychus Ulmi ◽  
Selective Action ◽  
Bud Development ◽  
Control Programs ◽  
Phytophagous Mites ◽  
European Red Mite ◽  
Metaseiulus Occidentalis ◽  
Mite Control ◽  
Aculus Schlechtendali

AbstractPlictran (tricyclohexyltin hydroxide) was very effective against the European red mite, Panonychus ulmi (Koch), and the apple rust mite, Aculus schlechtendali (Nalepa), when applied at the pink bud stage of apple bud development. Plictran as a summer spray was not so effective because a small number of phytophagous mites survived. Plictran, however, is low in toxicity to the predaceous phytoseiids Metaseiulus occidentalis (Nesbitt) and Typhloseiopsis sp. near arboreus (Chant), and these predators increased on the surviving phytophagous mites. Because of this selective action, Plictran is a very promising acaricide for use in integrated mite control programs.

CONTAGIOUS DISTRIBUTION IN THE EUROPEAN RED MITE, PANONYCHUS ULMI (KOCH), AND A METHOD OF GRADING POPULATION DENSITIES FROM A COUNT OF MITE-FREE LEAVES

1960 ◽  
Vol 38 (3) ◽  
pp. 645-653 ◽  
Author(s):  
D. P. Pielou
Keyword(s):  
Panonychus Ulmi ◽  
Total Count ◽  
Population Densities ◽  
Leaf Sample ◽  
Apple Trees ◽  
Assessment Of Performance ◽  
Narrow Zone ◽  
European Red Mite ◽  
Mite Density ◽  
The Mean

Examination of a large number of 100-leaf samples shows that the European red mite is distributed contagiously, not randomly, on leaves of apple trees. When the mean number of mites per leaf is plotted against the proportion of mite-free leaves for the corresponding sample, the points fall in a narrow zone, steepest and narrowest at the lower densities. Following application of miticides to heavily infested trees, it is usual to summarize the findings of the tests by grading the performance of the chemicals as excellent, good, etc. according to mite density as determined by s total count from the 100-leaf sample. A method is outlined, in which, by making use of plotted values, a count of mite-free leaves only is sufficient to allow the assessment of performance in such categories.

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.

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