scholarly journals PHENOLOGY OF THE SAN JOSE SCALE (HOMOPTERA: DIASPIDIDAE) IN NEW YORK STATE APPLE ORCHARDS,

1983 ◽  
Vol 115 (7) ◽  
pp. 717-722 ◽  
Author(s):  
Diane L. Mague ◽  
W. Harvey Reissig
Keyword(s):  
New York ◽  
New York State ◽  
Pheromone Trap ◽  
Apple Orchards ◽  
San Jose ◽  
Degree Days ◽  
Pheromone Trapping ◽  
Linear Relationships ◽  
San Jose Scale ◽  
Trap Catches

AbstractPheromone trapping studies from 1979 to 1981 showed that there were two periods of San Jose scale, Quadraspidiotus perniciosus (Comstock), male flight activity annually in western New York apple orchards. Spring flight, which resulted from overwintering black caps, began at ca. 94–140 degree-days (base 10 °C from 1 March) and occurred during bloom in the apple varieties studied. First generation crawlers emerged at ca. 360 degree-days. Second generation crawlers emerged at ca. 890 degree-days and were active throughout September. Regression analyses showed a logistic relationship between crawler density and fruit infestation, and inverse linear relationships between pheromone trap catches and San Jose scale infestation levels within trees.

Development of Pheromone Trapping Techniques for Male San Jose Scale (Homoptera: Diaspididae)1

1983 ◽  
Vol 12 (2) ◽  
pp. 371-375 ◽  
Author(s):  
S. C. Hoyt ◽  
P. H. Westigard ◽  
R. E. Rice
Keyword(s):  
San Jose ◽  
Pheromone Trapping ◽  
San Jose Scale

Are San Jose scale (Hom., Diaspididae) pheromone trap captures predictive of crawler densities?

2002 ◽  
Vol 126 (10) ◽  
pp. 545-549 ◽  
Author(s):  
F. R. Badenes-Perez ◽  
F. G. Zalom ◽  
W. J. Bentley
Keyword(s):  
Pheromone Trap ◽  
San Jose ◽  
San Jose Scale

The Parasites of the San Jose Scale in New York

1914 ◽  
Vol 7 (2) ◽  
pp. 227-229 ◽  
Author(s):  
H. E. Hodgkiss ◽  
P. J. Parrott
Keyword(s):  
New York ◽  
San Jose ◽  
San Jose Scale

scholarly journals Multi-site Thinning Comparisons with `Empire' and `McIntosh' Apples

HortScience ◽  
1997 ◽  
Vol 32 (3) ◽  
pp. 524C-524
Author(s):  
Alan N. Lakso ◽  
Terence L. Robinson ◽  
Eddie W. Stover ◽  
Warren C. Stiles ◽  
Stephen Hoying ◽  
...  
Keyword(s):  
New York ◽  
New York State ◽  
Fruit Size ◽  
Apple Orchards ◽  
Physiological Factors ◽  
Crop Load ◽  
York State ◽  
Climatic Regions ◽  
Trial Analysis ◽  
Fruit Stage

Many chemical, environmental, and physiological factors have been reported to be important to apple chemical thinning, so we have been developing a multi-site and multi-year database of chemical thinning results and potentially important factors. For 3 years, we have conducted replicated thinning trials in `Empire' and `McIntosh' apple orchards at six or seven sites around New York state in different climatic regions. Different concentrations of NAA and Accel (primarily benzyladenine), NAA/carbaryl and Accel/carbaryl combinations and unthinned controls were tested with treatments applied at the 10-mm king fruit stage by airblast sprayers. Flower cluster counts, set counts, yields, fruit sizes, and other factors thought important to thinning response (orchard condition/history, weather, application conditions, etc.) were measured or estimated in each trial. Analysis of factor importance is continuing, but some general results have come from the thinning trials so far. Thinning effectiveness varied among years from poor to adequate. There have not been consistent thinner concentration responses. Commercial NAA and Accel concentrations have not thinned adequately. NAA/carbaryl and Accel/carbaryl have thinned the most. For the same crop load, trees thinned with Accel or the carbaryl combination have had better fruit size than when thinned with NAA.

Effects of pheromone loading, dispenser age, and trap height on pheromone trap catches of the oriental fruit moth in apple orchards

2006 ◽  
Vol 34 (3) ◽  
pp. 252-260 ◽  
Author(s):  
Orkun B. Kovanci ◽  
Coby Schal ◽  
F. Walgenbach ◽  
George G. Kennedy
Keyword(s):  
Pheromone Trap ◽  
Oriental Fruit Moth ◽  
Apple Orchards ◽  
Trap Height ◽  
Trap Catches

THE USE OF PHEROMONE AND BARRIER TRAPS TO MONITOR SAN JOSE SCALE (HOMOPTERA: DIASPIDIDAE) PHENOLOGY IN THE OKANAGAN VALLEY OF BRITISH COLUMBIA

1986 ◽  
Vol 118 (8) ◽  
pp. 767-774 ◽  
Author(s):  
N.P.D. Angerilli ◽  
D.M. Logan
Keyword(s):  
British Columbia ◽  
Activity Pattern ◽  
San Jose ◽  
Degree Days ◽  
Baited Traps ◽  
Quadraspidiotus Perniciosus ◽  
San Jose Scale ◽  
Accumulated Degree Days ◽  
Okanagan Valley

AbstractComparisons of three isomers of the San Jose scale [Quadraspidiotus perniciosus (Comstock)] pheromone showed that SJS3 was slightly more attractive than SJS1 or SJS2. Pheromone-baited traps were compared with sticky barrier traps for the detection and monitoring of male emergence activity and each trap type produced a different activity pattern relative to both calendar days and accumulated degree-days (DD). San Jose scale phenology varied between geographic areas of the Okanagan Valley when compared by using DD accumulations above either 7.2 or 10.5°C and suggests a trend towards decreasing DD requirements as the insect’s distribution moves north.

Freezing degree-days in New York state

1985 ◽  
Vol 11 (1) ◽  
pp. 37-43 ◽  
Author(s):  
Thomas W. Schmidlin ◽  
Bernard E. Dethier
Keyword(s):  
New York ◽  
New York State ◽  
Degree Days ◽  
York State
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