scholarly journals Virus Diseases of Edible Seed Squash (Cucurbita pepo L.) in Turkey

2016 ◽  
Keyword(s):  
Cucurbita Pepo ◽  
Virus Diseases ◽  
Edible Seed

scholarly journals Delay in Mosaic Virus Onset and Aphid Vector Reduction in Summer Squash Grown on Reflective Mulches

HortScience ◽  
1993 ◽  
Vol 28 (9) ◽  
pp. 895-896 ◽  
Author(s):  
James E. Brown ◽  
James M. Dangler ◽  
Floyd M. Woods ◽  
Ken M. Tilt ◽  
Michael D. Henshaw ◽  
...  
Keyword(s):  
Mosaic Virus ◽  
Cucurbita Pepo ◽  
Virus Disease ◽  
Bare Ground ◽  
Plastic Mulch ◽  
Virus Diseases ◽  
Aphid Vector ◽  
Summer Squash ◽  
Disease Reduction ◽  
Aphid Populations

Silver reflective plastic mulches were compared with conventional bare-ground culture of yellow crookneck summer squash (Cucurbita pepo L. var. melopepo Alef.) for reducing aphids and the following mosaic virus diseases: cucumber mosaic, watermelon mosaic I and II, zucchini yellows mosaic, and squash mosaic. Plants grown on silver plastic mulch produced higher marketable yields than those grown on bare ground. Other colors (white, yellow, and black with yellow edges) of plastic mulch were intermediate in their effects on aphid population and virus disease reduction. Silver reflective mulch alone and silver reflective mulch with insecticide were superior to other colors of plastic mulch in reducing aphid populations. Silver reflective plastic mulch, with or without insecticide, resulted in 10 to 13 days delay in the onset of the mosaic diseases noted.

Search mode for rapid detection of virus particles

1991 ◽  
Vol 49 ◽  
pp. 286-287
Author(s):  
O. E. Bradfute
Keyword(s):  
Electron Microscopy ◽  
Rapid Detection ◽  
Plant Virus ◽  
Low Dose ◽  
Search Mode ◽  
Virus Diseases ◽  
Virus Particles ◽  
Focus Image ◽  
Time Required ◽  
Rapid Switching

Electron microscopy is frequently used in preliminary diagnosis of plant virus diseases by surveying negatively stained preparations of crude extracts of leaf samples. A major limitation of this method is the time required to survey grids when the concentration of virus particles (VPs) is low. A rapid survey of grids for VPs is reported here; the method employs a low magnification, out-of-focus Search Mode similar to that used for low dose electron microscopy of radiation sensitive specimens. A higher magnification, in-focus Confirm Mode is used to photograph or confirm the detection of VPs. Setting up the Search Mode by obtaining an out-of-focus image of the specimen in diffraction (K. H. Downing and W. Chiu, private communications) and pre-aligning the image in Search Mode with the image in Confirm Mode facilitates rapid switching between Modes.

Virus Diseases of the Respiratory Tract

1950 ◽  
Vol 34 (6) ◽  
pp. 1637-1652
Author(s):  
Thomas M. Durant ◽  
Charles R. Shuman
Keyword(s):  
Respiratory Tract ◽  
Virus Diseases

Studies on Thalidomide as a Cause of Congenital Malformations

1963 ◽  
Vol 02 (02) ◽  
pp. 49-51 ◽  
Author(s):  
K. Knapp ◽  
W. Lenz
Keyword(s):  
Federal Republic ◽  
Congenital Malformations ◽  
Chemical Substance ◽  
Federal Republic Of Germany ◽  
Virus Diseases ◽  
Many Sources

SummaryIn 1961 an increase in certain congenital malformations was noticed in various parts of the Federal Republic of Germany. From the outset, it seemed very probable that a single cause was responsible, since, although these malformations varied, they appeared to belong to one and the same syndrome. For general reasons, such causes as radioactivity, contraceptives, attempted abortions or virus diseases did not provide an acceptable explanation. The epidemiology was, however, suggestive of some chemical substance taken orally.After thalidomide had been indicated in several histories, suspicion of that drug was aroused and, within one week, intake of it could be proved or was found to be very likely in 17 out of 20 cases, while in the remaining cases it could not be excluded. Though this first result was highly significant, we were at first reluctant to incriminate thalidomide definitely, because there was still some doubt about the reliability of the histories. But within a few weeks, the thalidomide aetiology received support from many sources. Specific studies on limited material are sometimes superior to extensive, broadly planned investigations.

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