Results 211 to 220 of about 2,567 (236)
Some of the next articles are maybe not open access.
The functional response ofTyphlodromus pyri to its prey,Panonychus ulmi: the effect of pollen
Experimental and Applied Acarology, 1997We looked at the effect of the presence of pollen (Typha latifolia) on the functional response of Typhlodromus pyri (Phytoseiidae) to Panonychus ulmi (Tetranychidae) in the laboratory. We found that pollen significantly reduced the predation rate but that the magnitude of the effect was not large.
Qingcai Wei, Sandra J. Walde
openaire +2 more sources
Journal of Applied Entomology, 1992
AbstractThe spatial and temporal distribution of the European red mite Panonychus ulmi (Koch) on mature grapevines (Vitis vinifera L.) was studied during the different phenological stages of the plants. P. ulmi showed circadian movements between the lower and upper surface of the leaf: in the morning, the mites were located preferably on the lower ...
M. P. Candolfi +2 more
openaire +2 more sources
AbstractThe spatial and temporal distribution of the European red mite Panonychus ulmi (Koch) on mature grapevines (Vitis vinifera L.) was studied during the different phenological stages of the plants. P. ulmi showed circadian movements between the lower and upper surface of the leaf: in the morning, the mites were located preferably on the lower ...
M. P. Candolfi +2 more
openaire +2 more sources
Effects of phytoseiid predators on the sex ratio of the spider mite Panonychus ulmi
Canadian Journal of Zoology, 1991The 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
Dan L. Johnson, Heather C. Proctor
openaire +2 more sources
Experimental & Applied Acarology, 2005
We have developed baseline susceptibility values for four new acaricides: bifenazate, acequinocyl, spirodiclofen and etoxazole for eggs or adult females of a susceptible laboratory population of Panonychus ulmi (Koch) (Acari: Tetranychidae). Further, we have tested diagnostic concentrations of each acaricide against populations resistant to ...
D.J. Pree, K.J. Whitty, L. Van Driel
openaire +3 more sources
We have developed baseline susceptibility values for four new acaricides: bifenazate, acequinocyl, spirodiclofen and etoxazole for eggs or adult females of a susceptible laboratory population of Panonychus ulmi (Koch) (Acari: Tetranychidae). Further, we have tested diagnostic concentrations of each acaricide against populations resistant to ...
D.J. Pree, K.J. Whitty, L. Van Driel
openaire +3 more sources
Experimental and Applied Acarology, 2012
The developmental rate and reproductive biology of Neoseiulus californicus, a generalist predator on spider mites and small insects, was investigated in the laboratory at five constant temperatures: 15, 20, 25, 30, and 34°C. The European red mite, Panonychus ulmi, an important pest in Korean apple orchards, was used as prey. Mean developmental time and
H. F. El Taj, H. F. El Taj, Chuleui Jung
openaire +3 more sources
The developmental rate and reproductive biology of Neoseiulus californicus, a generalist predator on spider mites and small insects, was investigated in the laboratory at five constant temperatures: 15, 20, 25, 30, and 34°C. The European red mite, Panonychus ulmi, an important pest in Korean apple orchards, was used as prey. Mean developmental time and
H. F. El Taj, H. F. El Taj, Chuleui Jung
openaire +3 more sources
THE EFFECT OF DDT ON OVIPOSITION, AND ON BEHAVIOR, IN THE EUROPEAN RED MITE, PANONYCHUS ULMI (KOCH)
Canadian Journal of Zoology, 1960It has not been possible to confirm the statement that DDT brings about increased egg production in the European red mite, Panonychus ulmi (Koch). Newly emerged females were allowed to oviposit individually on single, whole, isolated apple leaves for their entire lifetime. On leaves sprayed with DDT, with mean deposits of 3.1 and 10.6 μg per sq.
openaire +2 more sources
Journal of Economic Entomology, 1958
Apple trees were grown in nutrient culture in the greenhouse on varying levels of nitrogen and phosphorus supply during two seasons. Females of Panonychus ulmi Koch and Tetranychus telarius (L.) were cultured on leaves detached from the trees and the resulting progeny were counted.
openaire +2 more sources
Apple trees were grown in nutrient culture in the greenhouse on varying levels of nitrogen and phosphorus supply during two seasons. Females of Panonychus ulmi Koch and Tetranychus telarius (L.) were cultured on leaves detached from the trees and the resulting progeny were counted.
openaire +2 more sources
BIOLOGICAL CONTROL OF PANONYCHUS ULMI IN APPLE ORCHARDS IN LLEIDA (NE OF SPAIN)
Acta Horticulturae, 1993M.J. Sarasúa +3 more
openaire +2 more sources
A VIRUS DISEASE OF THE EUROPEAN RED MITE PANONYCHUS ULMI (KOCH)
Canadian Journal of Microbiology, 1967openaire +3 more sources
Comparison of two control strategies of Panonychus ulmi (Koch) on vineyards
2021openaire +2 more sources