Zobrazeno 1 - 10
of 61
pro vyhledávání: '"R. W. WEIRES"'
Publikováno v:
Journal of Economic Entomology. 85:83-87
Eight bacterial species isolated from apple foliage were evaluated for attractiveness to adult apple maggot flies, Rhagoletis pomonella (Walsh) in the laboratory. None elicited a strong response from the adult apple maggot flies. Another, previously
Publikováno v:
Journal of Economic Entomology. 85:212-225
Laboratory and field studies were conducted during 1988-1990 to investigate Cornstock mealybug, Pseudococcus Cornstocki (Kuwana), infestations in pears ( Pyrus cummunis L.) grown for processing in New York. The incidence and size of external infestat
Autor:
Scott D. Lawson, R. W. Weires
Publikováno v:
Journal of Economic Entomology. 84:1550-1557
Three petroleum oils and one insecticidal soap were evaluated in laboratory tests at different rates for ovicidal efficacy against overwintering Panonychus ulmi (Koch) eggs. Sunspray 6E and Volck Supreme oils caused the greatest mortality of all mate
Autor:
R. W. Weires, D. Scott Lawson
Publikováno v:
Insecticide and Acaricide Tests. 15:38-38
Treatments were applied to 8 tree plots replicated 3 times in a randomized complete block design. All treatments were applied dilute to runoff using a high-pressure handgun sprayer at 400 psi delivering from 2.7 to 4.2 gal spray/tree or 262 to 407 ga
Publikováno v:
Journal of Economic Entomology. 80:230-236
Populations of the European red mite (ERM), Panonychus ulmi (Koch), from apple orchards throughout New York State were evaluated by laboratory bioassays to assess range of susceptibility to cyhexatin. As an indicator of cyhexatin susceptibility of ad
Publikováno v:
Journal of Economic Entomology. 82:692-697
Two field populations of European red mite, Panonychus ulmi (Koch), that were resistant to cyhexatin were exposed for 2 yr to three different levels of selection pressure by cyhexatin to determine whether resistance was stable under field conditions.
Publikováno v:
Journal of Economic Entomology. 81:1551-1561
Susceptibility to dicofol of populations of Panonychus ulmi (Koch) and Tetranychus urticae Koch from New York apple orchards was estimated in 1985-1986 with a whole-plant residual bioassay. Nine of 14 P. ulmi populations collected from throughout the
Publikováno v:
Environmental Entomology. 8:51-54
The minimum temperature threshold for the development of apple maggot pupae, Rhagoletis pomonella was 6.4°C. From 1951–75 the 1st flies emerged in cages over infested apples on the avg on June 15 near Highland, NY and on June 23 in Geneva, NY. The
Publikováno v:
Journal of Economic Entomology. 75:680-684
Spoiled tentiform leafminer, Phyllonorycter blancardella (F.), moths collected from Western New York commercial apple orchards were highly resistant to azinphosmethyl and carbaryl but susceptible to demeton, endosulfan, methomyl, and oxamyl. Apantele
Autor:
R. W. Weires
Publikováno v:
Journal of Economic Entomology. 77:186-189
Outbreaks of the Comstock mealybug, Pseudococcus comstocki (Kuwani), occurred in three of the five test plots where the pyrethroed insecticide, flucythrinate, was evaluated for control of apple insects. Where no insecticides were used, mealybug-damag