Peach trees
(Continued from Page A3O)
Greene explained. And that, he
vent on to say, is exactly the
situation fruit growers are
generally faced with in Penn
sylvania
“Because temperatures fluc
tuate in this area, the trees are not
able to reach their maximum level
of hardiness,” he said.
Greene cited temperature
readings taken during the winter of
1982 as an example.
“On January 17 and 18 of 1982,
Adams County had temperatures
of minus 13 degrees,” he said. He
then pointed out that just 12 days
before, on January 5, the tem
peratures was 47 degrees.
He went on to say that these low
temperatures were comparable to
temperature readings taken on the
same date in Ontario. “Peach
breeders in that area called it a
test winter,” Greene said, adding
that the Pennsylvania tem
peratures were actually more
harmful because of the fluc
tuations.
Sun play rcle
Along with the fluctuating
temperatures, researchers feel
that bright, sunny days also play a
role in the amount of injury a tree
sustains. The sun causes the tree’s
bark to heat up, in some cases by
as much as 30 degrees. As a result,
on a warm, sunny day the bark
temperatures can reach 80
degrees. This, he continued, in
terferes with the tree’s ability to
reach its maximum level of har
diness. To try and off-set this
situation, researchers recommend
that fruit growers paint the bark of
the trees white in hope of coun
teracting the heating due to the
sun’s rays.
“If we could keep the tree trunks
at air temperature it would be
beneficial,” he said.
Any damage which may occur
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this winter probably will not
become evident immediately,
Greene went on to say. He added
that damage assessed through the
PICM project may have occurred
during the winer of 1978.
Cut into trunks
Researchers are able to quite
accurately predict when winter
injury occurred by cutting the
trunks of dead trees. This practice
has resulted in new data which,
when incorporated into the study,
has led to the belief that winter
injury is a main reason for tree
mortality.
Specifically, the nCM project
involved the study of 50 orchard
sites in five counties. Orchards ir
Allegheny agent retires
PITTSBURGH - Philip L.
Sellers, county extension director
and senior extension agent in
Allegheny County, retired Tuesday
after 37 years of service.
Before going to Allegheny
County, he was an assistant agent
and then associate agent in Butler
County.
He has developed and promoted
Extension education programs for
urban and farm people and has
conducted numerous clinics and
demonstrations for homeowners, 1
landscape nurserymen, com
mercial flower and vegetable
growers, garden supply dealers,
park employees and school ground
superintendents.
Through these programs par
ticipants received the latest
research and management in
formation in agronomy, vegetable
gardening, ornamental hor
ticulture and insect and disease
control.
Sellers also developed a
program of better rural-urban
relations through Farm-City
Week, which orohanm
FEBRUARY SPECIALS
Adams, York, Franklin, Berks and
Lehigh counties were included in
the project. Greene said*at 27 of
those sites it is felt that winter
injury was the primary cause for
peach tree mortality.
“We feel the project has been
successful in identifying the major
problems,” he said, “Now the
research needs to be done on
correcting those problems.”
A statewide meeting for peach
growers which will focus on an
integrated crop management
program as a means of extending
peach tree life will be held Mon
day, at the Heidlersburg Fireball.
The meeting will run from 10 a.m.
to 3 p.m. and includes dinner.
visits between rural and urban
families. He also prepared exhibits
pointing out the importance of
agriculture to the economy and
used radio and television to show
the importance of agriculture to
the state.
He received the Distinguished
Service Award from the National
Association of County Agricultural
Agents in 1965. He is a member of
Alpha Gamma Rho, agriculture
professional fraternity; Epsilon
Sigma Phi, Extension honorary;
the National and Pennsylvania
County Agents Associations, the
Pittsburgh City Farmers’ Club, the
Men’s Garden Club of America and
the Chamber of Commerce of
Greater Pittsburgh.
A State College native, Sellers
received a bachelor of science
degree in agronomy from Penn
State in 1943. During World War 11,
he served with the U.S. Navy
Seabees in Europe.
He is married to the former
Emmeline Mehlman of Johnstown.
They are the parents of two sons.
Lancaster Faming, Satarday, February 4,1M4—A31
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