NEWARK, DEL. Defoliation
of shade trees by gypsy moths and
other leaf-feeding insects isn’t
usually considered a serious
problem, says University of
Delaware extension horticulturist
Charles Dunham. When trees lose
their leaves early in the season,
they soon put out new ones, he
says. But foliage loss does reduce
growth. It also affects flower and
fruit bud formation.
The problem is more serious
when defoliation occurs two or
three years in a row. If a tree is
under another stress as well—such
as - drought—it may go into a
general decline. When that hap
pens, dieback and even death may
result, says Dunham.
Defoliation is a more serious
problem with evergreens like pines
which can’t replace lost needles, so
it should be prevented if at all
possible. Injury to evergreens is
directly related to the extent of
needle loss.
There are a number of ways to
minimize the effects of defoliation
on deciduous trees, says Dunham.
Basically, these involve reducing
other' stress factors and en
couraging rapig generation of new
leaves.
At Hamilton Bank, we still
make house calls.
One of the biggest advantages
Hamilton Bank can offer you is
personal service - local contact
through local offices.
We have 63 offices throughout
Southcentral Pennsylvania farm
areas. So there’s one close to you.
You probably know your local
Hamilton Bank manager. He’s a
neighbor, a friend. And when you
need his help, he’s willing to come
to you. If it’s more convenient, he'll
Shady Breeze Farm. RFD #2, Myerstown, Pa The Bamel B Horning family discussing their farm records with Hamilton Bank
representatives (L to R) Merritt J Marks, Senior Vice President and Regional Administrator for the Lebanon Region, Mary
Horning, Daniel Homing and Randy L Brandt, Area Manager of the Richland/Newmanstown Cluster (Standing) Marlin Horning
The Hornings 72-acre farm operation includes 118 steers along with the growing of produce to sell at their stand on the farm
How to help defoliated trees recover
Your first concern should be to
make sure affected trees get
enough water. This is especially
important during periods of dry
weather. Apply enough water to
soak soil in the root zone to a depth
of 12 to 18 inches. This means
putting on about a gallon of water
for each square foot of soil area
under the tree canopy. Water
every two weeks until leaves are
fully developed. Take care to
prevent runoff, so that what you
put on soaks into the ground.
Regrowth of leaves can be
hastened and stimulated by
feeding trees with a fertilizer high
in nitrogen. This is especially
important for valuable or
namentals and tres weakened by
other stress factors in addition to
defoliation. For rapid response,
apply the fertilizer either in liquid
form to the root system, or as a
foliar spray to developing leaves.
To root feed, dissolve soluble
fertilizers like 20-20-20 or 30-10-10 in
water and apply them with a root
feeder in the area under the tree
canopy. Use a rate of 2 pounds of
fertilizer for 100 gallons of water.
Apply 5 gallons of solution for each
inch of trunk diameter. Do this as
soon as possible after defoliation.
come out to your house, sit down,
and work right along with you to
take care of any problems or
questions you may have.
He knows his business, he
understands farming, and he’s
backed up by a seasoned
Agri-Finance Department. So
when you have a question about
banking, just call your friend at
Hamilton Bank. He still makes
house calls.
Expanding young leaves have a
high capacity for nutrient ab
sorption, says Dunham. Special
mixtures that contain nitrogen in
the form of urea are required for
foliar feeding. These spray feed
formulations may have ratios like
30-10-10. Dissolve them at the rate
of 2 pounds of fertilizer per 100
gallons of water, and apply to
leaves and branches as a spray to
Chester Co. milk promotion
AVONDALE Today a milk
promotion is scheduled to take
place at the Avondale Grange
in conjunction with the tricentennial
celebration being held all day in
Avondale. The Chester County
Milk Promotion Committee is
sponsoring the milk promotion,
and it will get under way at 10 a.m.
and run until 3 p.m.
On hand for the celebration will
be a live Jersey cow and calf, also
a cow of uncertain origins and a
HAMILTON
BANK
Lancaster Firming, Saturday, May 21,1983—€
the point of runoff. Apply when
new leaves are about half ex
panded. Repeat once or twice as
needed.
Trees which are in active,
vigorous growth at the time of
defoliation will suffer less than
those which are already under
stress from other causes, says
Dunham.
different color, a pink cow!
Persons attending the event will
be given the opportunity to test
their knowledge of dairy science,
by taking a brief quiz. Anyone who
answers the questions correctly
will be given a coupon for a
discount at Landhope Farm dairy
stores.
Cheese and butter samples will
be given away, so don’t miss the
fun, get out today for the
celebration.
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i» l n«T n i l fiT..nrn 3007 H. NEWPORT RD.
LANTZ STRUCTURES honks. ?a mn
2Vz Miles S. of Rt. 23 - Aiong.Rt. 772
Leave Message at 717-656-9418
HOURS; Mon. thru Fn. 8-5. Sat. 8-4; Closed Sun.
(Continued from Page C 2)
technical committee for the
Northeast Agricultural Ex
periment Station black fly regional
project. The committee meets
once a year to evaluate research
findings from the different states
and set a course for future
research. By collecting as much
information as they can on the
biology and distribution of this
insect, identifying as many species
as possible, evaluating its impact
on humans, domestic animals and
wildlife, studying its population
dynamics and developing methods
for rearing it in the laboratroy, the
group hopes in time to develop
safe, effective controls for the
black fly. At present there are no
effective insecticides cleared for
use against it.
Although none of the states
participating in the project has
instituted an organized black fly
control program. Lake says one
material - a strain of the biologic
insecticide Bacillus thuringiensis
called israelensis (BTI) - shows
great promise on black fly larvae.
Though the material has not been
registered for black fly control, it
has been shown to have little ad
verse effect on other aquatic in
sects or invertebrates. (One of the
few other'organisms it does kill is
the mosquito larva - in fact, Lake
and fellow researchers at the
University of Delaware are testing
BTI for that use.)
Until an effective control
program is available for black
flies, people who plan to be out
doors where this pest is active will
have to seek relief from attack
with an insect repellent, the en
tomologist says.
To speed local research efforts.
Lake asks Delaware residents
troubled with black flies this
spring to call him at 738-2526.
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