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Dr. George F. Knowlton holding up two drawings of pea aphids, 1950s
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Dr. George F. Knowlton holding up two drawings of pea aphids, 1950s
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usu_a0845.jpg
Title
Dr
.
George
F
.
Knowlton
holding
up
two
drawings
of
pea
aphids
,
1950s
Description
Dr
.
George
F
.
Knowlton
, at the
USAC
Agricultural
Experiment
Station
,
holding
up
two
drawings
of
pea
aphids
, a
common
pest
of
pea
,
alfalfa
and of
certain
clovers
,
1950s
.
Aphids
spread
virus
diseases
of
celery
,
potatoes
,
beans
, and
various
other
farm
crops
. These
tiny
pests
were
investigated
by
Dr
.
George
F
.
Knowlton
for a
number
of
years
. He
spent
many
years
in
research
,
teaching
, and
extension
activities
dealing
with the
insect
pests
of
crops
and
livestock
in the
Intermountain
area
.
Size
of
photograph
:
8
x
9.75
in.
Date.Original
1950-1959
Subject.LCSH
Utah State University -- History -- Pictorial works
Knowlton, George F. -- Portraits
Entomology -- Utah -- Logan -- Pictorial works
Utah State Agricultural College -- History -- Pictorial works
Entomology -- Research -- Utah -- Logan -- Pictorial works
Entomologists -- Utah -- Logan -- Portraits
Subject.GMGPC
Photographs
Portrait photographs
Time Period
1950-1959
Source
USU
Historical
Photo-board
Collection
,
photo
no
.
USU-A0845
Type
Image
Digital Publisher
Utah State University Libraries
Rights
Reproduction for publication, exhibition, web display or commercial use is only permissible with the consent of the USU Libraries photograph curator, phone (435) 797-0890
Date.Digital
12/1/2003
conversionSpecifications
600
ppi
,
8-bit
grayscale
,
uncompressed
TIFF
image
scanned
using
Creo-Scitex
Eversmart
Jazz+
scanner
Format
Image/jpeg
Holding.Institution
Utah State University, Special Collections and Archives
USU Call Number
USU-A0845
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