scholarly journals Preliminary search for a νirus in Dacus oleae Gmel. populations in Northern Greece

2017 ◽  
Vol 4 ◽  
pp. 15 ◽  
Author(s):  
T. Manousis ◽  
S.M. Eley ◽  
J.S.K. Pullin ◽  
Α. Labropoulos ◽  
N.F. Moore
Keyword(s):  
Small Proportion ◽  
Dacus Oleae ◽  
Northern Greece ◽  
Virus Like Particles ◽  
The Dead

A large number of larvae of Dacus oleae were collected from infested olives in Northern Greece, and a small proportion of these were found to be dead. Adult flies were caught in McPhail traps at the same locations. The larvae and adults were fractionated by a series of steps designed to identify occluded and nonoccluded viruses. Virus-like particles were identified in small amounts only in the dead larvae.

scholarly journals Αn assessment of components of crop loss due to infestation by Dacus oleae, in Corfu

2017 ◽  
Vol 1 ◽  
pp. 7 ◽  
Author(s):  
Ε.Τ. Kapatos ◽  
B.S. Fletcher
Keyword(s):  
Small Proportion ◽  
Stage Larva ◽  
Crop Loss ◽  
Fruit Pulp ◽  
Dacus Oleae ◽  
The Third ◽  
Fruit Drop ◽  
Olive Fly ◽  
Third Stage

An assessment of components of crop loss caused by the olive fly, Dacus oleae, was carried out in Corfu during the years 1976-1979. The results indicate that the most important component of crop loss due to D. oleae infestation is the preharvest fruit drop induced, mainly, by the third stage larva. Using three starting dates, which coincided with the main periods of infestation between July and October, estimates were made of the proportions of infested fruits induced to fall prematurely before the start of harvesting in November. The larva of D. oleae consumes only a small proportion of the fruit pulp (on average 4.48 %). The effect of infestation on the acidity of the oil is indirect and it is important only when the fruits remain for over a week on the ground before they are collected. Compensation by the tree for premature fruit drop caused by D. oleae infestation does not appear to be of any significance in assessing crop loss.

Occurrence of virus-like particles in the Dead Sea

Extremophiles ◽  
1997 ◽  
Vol 1 (3) ◽  
pp. 143-149 ◽  
Author(s):  
Aharon Oren ◽  
Gunnar Bratbak ◽  
Mikal Heldal
Keyword(s):  
Dead Sea ◽  
Virus Like Particles ◽  
The Dead

Cytoplasmic Tubules in Cells Infected with Laryngotracheitis Virus

1969 ◽  
Vol 27 ◽  
pp. 376-377
Author(s):  
A. M. Watrach
Keyword(s):  
Tissue Culture ◽  
Small Proportion ◽  
Chicken Embryo ◽  
Culture Cells ◽  
Tissue Culture Cells ◽  
Morphologic Characteristics ◽  
Infectious Laryngotracheitis ◽  
Laryngotracheitis Virus ◽  
In Cells

During a study of the development of infectious laryngotracheitis (LT) virus in tissue culture cells, unusual tubular formations were found in the cytoplasm of a small proportion of the affected cells. It is the purpose of this report to describe the morphologic characteristics of the tubules and to discuss their possible association with the development of virus.The source and maintenance of the strain of LT virus have been described. Prior to this study, the virus was passed several times in chicken embryo kidney (CEK) tissue culture cells.

An Alternative Method for Identifying a Failed Engine in Twin-Engine Propeller Aircraft

2020 ◽  
Vol 10 (2) ◽  
pp. 103-111
Author(s):  
Andrey K. Babin ◽  
Andrew R. Dattel ◽  
Margaret F. Klemm
Keyword(s):  
Human Error ◽  
Flight Simulator ◽  
Traditional Group ◽  
Aircraft Accidents ◽  
Alternative Method ◽  
Indicator Group ◽  
Group A ◽  
The Dead ◽  
Engine Failure ◽  
And Performance

Abstract. Twin-engine propeller aircraft accidents occur due to mechanical reasons as well as human error, such as misidentifying a failed engine. This paper proposes a visual indicator as an alternative method to the dead leg–dead engine procedure to identify a failed engine. In total, 50 pilots without a multi-engine rating were randomly assigned to a traditional (dead leg–dead engine) or an alternative (visual indicator) group. Participants performed three takeoffs in a flight simulator with a simulated engine failure after rotation. Participants in the alternative group identified the failed engine faster than the traditional group. A visual indicator may improve pilot accuracy and performance during engine-out emergencies and is recommended as a possible alternative for twin-engine propeller aircraft.

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