FECUNDITY AND RATE OF DEVELOPMENT OF THE EUROPEAN RED MITE, PANONYCHUS ULMI (KOCH) (ACARINA: TETRANYCHIDAE), ON LEAVES FROM AN ABANDONED PEACH ORCHARD

1964 ◽  
Vol 42 (5) ◽  
pp. 719-722 ◽  
Author(s):  
Wm. L. Putman
Keyword(s):  
Population Density ◽  
Nutritional State ◽  
Panonychus Ulmi ◽  
Immature Stages ◽  
Rate Of Development ◽  
European Red Mite ◽  
Peach Orchard

The fecundity of the European red mite, Panonychus ulmi (Koch), reared on leaves from an abandoned peach orchard was equal to that of mites on leaves from a cultivated orchard, but the development of immature stages was slightly slower on leaves from the abandoned orchard. Poor nutritional state of the foliage is apparently not responsible for the very low population density of the mite in abandoned peach orchards.

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.

SOME EFFECTS OF ANOXIA AND HYPOXIA ON THE EUROPEAN RED MITE, PANONYCHUS ULMI (ACARINA: TETRANYCHIDAE)

1968 ◽  
Vol 100 (6) ◽  
pp. 617-623 ◽  
Author(s):  
Wm. L. Putman
Keyword(s):  
Relative Humidity ◽  
Panonychus Ulmi ◽  
High Humidity ◽  
Immature Stages ◽  
Pure Nitrogen ◽  
Adult Females ◽  
European Red Mite ◽  
Partial Paralysis

AbstractProgressively increasing lengths of exposure to pure nitrogen caused temporary anaesthesia, irreversible partial paralysis, and death, in that order, to the European red mite, Panonychus ulmi (Koch). The immature stages, especially eggs, were more tolerant than adult females. Confinement in 2.5% oxygen at a relative humidity approximating 100% had no effect on the mites, except on oviposition, beyond that of high humidity alone.

SOME ASPECTS OF SEX IN THE EUROPEAN RED MITE, PANONYCHUS ULMI

1970 ◽  
Vol 102 (5) ◽  
pp. 612-617 ◽  
Author(s):  
Wm. L. Putman
Keyword(s):  
Seasonal Variation ◽  
Life Span ◽  
Young Male ◽  
Panonychus Ulmi ◽  
Nymphal Instar ◽  
European Red Mite ◽  
Peach Orchard

AbstractThe proportion of females of the European red mite, Panonychus ulmi (Koch), reared from periodic samples of larvae and nymphs from a peach orchard averaged about 75% with little seasonal variation. A male can copulate at least 11 times in 2 hr, and inseminate at least 26 females during its life span, but many later copulations inseminate the females incompletely or not at all. Some females copulate at least three times but one copulation with a young male enables a female to lay the usual proportion of fertilized (female) eggs, which exceeds that of unfertilized (male) eggs. No evidence of males with only one nymphal instar, as reported in Europe, was found in mites reared at 15°, 22°, or 30 °C. Males disperse much more rapidly than females.

OCCURRENCE AND TRANSMISSION OF A VIRUS DISEASE OF THE EUROPEAN RED MITE, PANONYCHUS ULMI

1970 ◽  
Vol 102 (3) ◽  
pp. 305-321 ◽  
Author(s):  
Wm. L. Putman
Keyword(s):  
Population Density ◽  
Crystalline Structure ◽  
Virus Disease ◽  
Panonychus Ulmi ◽  
Oral Secretions ◽  
Feeding Sites ◽  
European Red Mite ◽  
Water Suspensions

AbstractA rod-shaped noninclusion virus infects the European red mite, Panonychus ulmi (Koch), in Ontario. Infection and death can occur in any postovarial stage. Most infected mites contain, in the midgut, more or less spheroidal inclusions with a radiating crystalline structure. Infected mites deposit inoculum on the leaves, probably in excreta or oral secretions at feeding sites, which is picked up orally by uninfected mites while feeding. The inoculum on the leaves is very unstable, seldom remaining infective for more than a week and being almost immediately inactivated after exposure to water. Suspensions of infected mites, triturated in water or various solutions, were inefficient inocula.Introduction of virus into orchard populations of P. ulmi induced epizootics that rapidly reduced the population density. Natural epizootics were found only in dense populations.

SEX RATIO OF THE EUROPEAN RED MITE, PANONYCHUS ULMI (ACARINA: TETRANYCHIDAE), IN APPLE ORCHARDS IN NOVA SCOTIA

1975 ◽  
Vol 107 (8) ◽  
pp. 825-828 ◽  
Author(s):  
H. J. Herbert ◽  
K. P. Butler
Keyword(s):  
Nova Scotia ◽  
Population Density ◽  
Sex Ratio ◽  
First Generation ◽  
Panonychus Ulmi ◽  
Apple Orchards ◽  
Male And Female ◽  
Average Percentage ◽  
European Red Mite ◽  
Different Levels

AbstractThe number of male and female first generation Panonychus ulmi (Koch) were recorded from 13 apple orchards representing widely different levels of mite infestation on four different varieties. The average percentage of males was 27.5. Statistically significant differences were found among orchards, varieties, observers, and their interactions. No relationship between sex ratio and population density was evident.

Effects of phytoseiid predators on the sex ratio of the spider mite Panonychus ulmi

1991 ◽  
Vol 69 (1) ◽  
pp. 208-212 ◽  
Author(s):  
Dan L. Johnson ◽  
Heather C. Proctor
Keyword(s):  
Population Density ◽  
Sex Ratio ◽  
Spider Mite ◽  
Total Population ◽  
Panonychus Ulmi ◽  
Encounter Rate ◽  
Male Mortality ◽  
Adult Sex Ratio ◽  
Biased Sex Ratio ◽  
Male Activity

The effect of predator presence on the adult sex ratio of a spider mite (Panonychus ulmi) was examined in a field experiment. Phytoseiid predators (chiefly Typhlodromus occidentalis) were removed from 32 trees harboring P. ulmi populations, and allowed to remain at natural levels on 32 other trees. Both total population density and proportion of males in the prey population were significantly higher in predator-free trees. Mechanisms that could explain the increase in the proportion of males are examined. The most probable is that greater male activity results in a higher encounter rate between predator and prey, and that subsequent higher male mortality when predators are present exaggerates the female-biased sex ratio. The theoretical effects of sex-biased predation on diplo-diploid and haplo-diploid organisms are discussed.

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.

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