Factors Influencing Scale Insect Populations in Southern Pine Monocultures

1987 ◽  
Vol 70 (1) ◽  
pp. 65 ◽  
Author(s):  
Barbara J. Sheffer ◽  
Michael L. Williams
Keyword(s):  
Scale Insect ◽  
Southern Pine ◽  
Factors Influencing ◽  
Insect Populations

Factors Influencing Stored-oat Insect Populations in South Dakota

1986 ◽  
Vol 79 (2) ◽  
pp. 518-522 ◽  
Author(s):  
J. A. Ingemansen ◽  
D. L. Reeves ◽  
R. J. Walstrom
Keyword(s):  
South Dakota ◽  
Factors Influencing ◽  
Insect Populations

scholarly journals Comparing armoured scale insect (Hemiberlesia spp) populations on male and female Actinidia chinensis vines

2009 ◽  
Vol 62 ◽  
pp. 274-278
Author(s):  
M.G. Hill ◽  
S.J. Dobson ◽  
C.M. Mckenna ◽  
B.J. Maher ◽  
N.A. Mauchline
Keyword(s):  
Scale Insect ◽  
Scale Insects ◽  
Insect Control ◽  
Actinidia Chinensis ◽  
Male And Female ◽  
Insect Populations ◽  
Armoured Scale Insects

The wood and leaves of Actinidia chinensis Hort16A and two male pollinisers A chinensis Meteor and A chinensis Sparkler from commercial kiwifruit orchards were sampled for the presence of armoured scale insects during winter 2007 and summer 2008/09 The numbers and species of scale insect were recorded Meteor had high armoured scale insect populations on its wood with approximately 10 times more armoured scale insects than Sparkler or Hort16A The leaves of Hort16A vines adjacent to Meteor vines had 44 more armoured scale insects and were 30 more likely to be infested by scale insects than the leaves of Hort16A vines adjacent to Sparkler vines The implications of these findings for armoured scale insect control on Hort16A fruit are discussed

scholarly journals Artificial light and biting flies: the parallel development of attractive light traps and unattractive domestic lights

2021 ◽  
Vol 14 (1) ◽  
Author(s):  
Roksana Wilson ◽  
Andrew Wakefield ◽  
Nicholas Roberts ◽  
Gareth Jones
Keyword(s):  
Disease Transmission ◽  
Disease Surveillance ◽  
Light Trapping ◽  
Light Traps ◽  
Comprehensive Understanding ◽  
Vector Species ◽  
Positive Phototaxis ◽  
Factors Influencing ◽  
Efficient Vector ◽  
Insect Populations

AbstractLight trapping is an important tool for monitoring insect populations. This is especially true for biting Diptera, where light traps play a crucial role in disease surveillance by tracking the presence and abundance of vector species. Physiological and behavioural data have been instrumental in identifying factors that influence dipteran phototaxis and have spurred the development of more effective light traps. However, the development of less attractive domestic lights has received comparatively little interest but could be important for reducing interactions between humans and vector insects, with consequences for reducing disease transmission. Here, we discuss how dipteran eyes respond to light and the factors influencing positive phototaxis, and conclude by identifying key areas for further research. In addition, we include a synthesis of attractive and unattractive wavelengths for a number of vector species. A more comprehensive understanding of how Diptera perceive and respond to light would allow for more efficient vector sampling as well as potentially limiting the risk posed by domestic lighting.

Effect of Spray Residues on Scale Insect Populations

1938 ◽  
Vol 31 (6) ◽  
pp. 731-732 ◽  
Author(s):  
Max R. Osburn ◽  
Herbert Spencer
Keyword(s):  
Scale Insect ◽  
Insect Populations

CONTACT TOXICITIES OF FIVE PYRETHROID AND FOUR ORGANOPHOSPHOROUS INSECTICIDES TO TOUMEYELLA PARVICORNIS (COCKERELL) CRAWLERS

1992 ◽  
Vol 124 (3) ◽  
pp. 563-564
Author(s):  
S.R. Clarke ◽  
G.L. DeBarr ◽  
T.X. Liu
Keyword(s):  
Insect Pest ◽  
Scale Insect ◽  
Scale Insects ◽  
Similar Relationship ◽  
Southern Pine ◽  
Seed Orchards ◽  
Control Seed ◽  
Organophosphorous Insecticides ◽  
Lower Contact

The use of pyrethroids in southern pine seed orchards to control seed and cone insects has sometimes resulted in outbreaks of scale insects (Nord et al. 1985). Onset of these infestations has been related in part to the relatively low contact toxicities of pyrethroids (Clarke et al. 1988). Pyrethroids have lower contact toxicities than organophosphorous insecticides against crawlers of the striped pine scale, Tourneyella pini (King). Our objective was to determine if a similar relationship existed for the pine tortoise scale, Tourneyella parvicornis (Cockerell), another scale insect pest that infests southern pine seed orchards.

Factors influencing adhesive bonding at the bone/implant interface

1992 ◽  
Vol 50 (2) ◽  
pp. 1114-1115
Author(s):  
Julie A. Martini ◽  
Robert H. Doremus
Keyword(s):  
Electron Microscopy ◽  
Adhesive Bonding ◽  
Microscopy Study ◽  
Electron Microscopy Study ◽  
Bone Implant ◽  
Factors Influencing ◽  
Lr White ◽  
Transmission Electron ◽  
New Zealand White Rabbits ◽  
Scanning Electron

Tracy and Doremus have demonstrated chemical bonding between bone and hydroxylapatite with transmission electron microscopy. Now researchers ponder how to improve upon this bond in turn improving the life expectancy and biocompatibility of implantable orthopedic devices.This report focuses on a study of the- chemical influences on the interfacial integrity and strength. Pure hydroxylapatite (HAP), magnesium doped HAP, strontium doped HAP, bioglass and medical grade titanium cylinders were implanted into the tibial cortices of New Zealand white rabbits. After 12 weeks, the implants were retrieved for a scanning electron microscopy study coupled with energy dispersive spectroscopy.Following sacrifice and careful retrieval, the samples were dehydrated through a graduated series starting with 50% ethanol and continuing through 60, 70, 80, 90, 95, and 100% ethanol over a period of two days. The samples were embedded in LR White. Again a graduated series was used with solutions of 50, 75 and 100% LR White diluted in ethanol.

Factors Influencing Electrophysiologic Responsivity in Normal Adults

1965 ◽  
Vol 8 (4) ◽  
pp. 323-347
Author(s):  
Robert Goldstein ◽  
Benjamin RosenblÜt
Keyword(s):  
Conditioned Stimulus ◽  
White Light ◽  
Pure Tone ◽  
Alpha Rhythm ◽  
White Women ◽  
White Men ◽  
Inverse Relation ◽  
Factors Influencing ◽  
Electrodermal Responses ◽  
Normal Adults

Electrodermal and electroencephalic responsivity to sound and to light was studied in 96 normal-hearing adults in three separate sessions. The subjects were subdivided into equal groups of white men, white women, colored men, and colored women. A 1 000 cps pure tone was the conditioned stimulus in two sessions and white light was used in a third session. Heat was the unconditioned stimulus in all sessions. Previously, an inverse relation had been found in white men between the prominence of alpha rhythm in the EEG and the ease with which electrodermal responses could be elicited. This relation did not hold true for white women. The main purpose of the present study was to answer the following questions: (1) are the previous findings on white subjects applicable to colored subjects? (2) are subjects who are most (or least) responsive electrophysiologically on one day equally responsive (or unresponsive) on another day? and (3) are subjects who are most (or least) responsive to sound equally responsive (or unresponsive) to light? In general, each question was answered affirmatively. Other factors influencing responsivity were also studied.

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