#
NEWARK, Del. - A 1982
University of Delaware survey has
shown that the Dectes stem borer
is present in many Delaware
soybean fields. The insect, which
formerly infested only weeds,
Four ways to belter hoy
Gehl haying machines are the next best thing
to sunshine. They help you make better hay
even when the weather is going against you.
No-plug mowing. Our new disc mowers and
disc mower conditioner tackle heavy standing
grass or wet, down and tangled material with
out plugging. Heavy duty discs rotate at
3000 rpm to cut through Just about any crop.
Leaf-saver mower conditioners feature all
gear main drive and gentle-action condition
ing rolls. Even when conditions are marginal
you'll get fast-drying windrows that retain
important nutrients.
Gentle raking. Our new full line of finger
wheel rakes gently gathers swaths up to
22-faet wide. They give you light and airy
windrows while saving leaves and nutrition.
Exclusive Total Density Control (TDC). Only
Gehl’s new round balers with the unique
“alr-draulic” system give you Total Density
Control. Lets you adjust bale density to
suit the crop, moisture and field conditions.
You get bales that stay round and resist
weather. Choose from two models, the
All Haymaking Equipment has interest free waiver until
Sept. 1.1983.
Skid-Steer Loaders and Mix-Alls have interest free
waiver until July 1.1983.
PEOPLE’S
SALES & SERVICE
Oakland Mills, PA
717-463-2735
A. L. HERR & BRO.
Quarryville, PA
717-786-3521
S. JOHNSON HURFF
Pole Tavern
Monroeville, NJ
609-358-2565 or
609-769-2565
MMHJNW.SCIffiEFFmt
Main Rd.. Pitman, PA IMPIUWH «*«-. HH>.
717-648-1120 Richland,-PA
717-866-7518
Dectes stem borer affecting Del. soybeans
appears to be evolving so that it
also overwinters in soybeans.
When it does this it can seriously
reduce yields.
Last summer university scien
tists found adult Dectes borers
GEHL
FARM EQUIPMENT
Waiver terms on all Gehl Equipment
Example:
STOUFFER BROS. INC.
Chambersburg, PA
717-263-8424
WERTZ GARAGE
Lineboro, MD
301-374-2672
REED BROTHERS
EQUIPMENT
Petticoat Bridge Rd.
Columbus, NJ
609-298-3441
INCH EQUIPMENT CO.
516 Mam Street _ , ..
Honesdale, PA
717-253-3440 717-758-3021
1850 for over 2000 lb. bales or the 1450 for
over 1000 lb. bales.
And you can easily move these big bales
with Gehl bale handlers.
Beat the weather and make better hay. See
your Gehl dealer.
Gehl Compai
West Bend, Wisconsin 53095
ARNETTS GARAGE MILLER EQUIPMENT CO.
Rt. 9 Box 125 RDI
Hagerstown, MD Bechtelsville, PA
301-733-0515 215-845-2911
CLAIR J. MYERS
Lake Road R 1
Thomasville, PA
717-259-0453
UMBERGER’S MILL
Rt. 4 Lebanon, PA
(Fontana)
717-867-5161
PAUL W. HISTAND
CO., INC.
697 N. Main St.
Doyiestown, PA
215-248-9041
on common ragweed plants in 18
out of 30 fields monitored weekly
from July 27 to August 29 in Kent
and Sussex counties. Adults also
were found on ragweed growing in
soybeans in parts of New Castle
BINKLEY S
HURST DUOS.
133 Rothsville
Station Road
Lititz, PA
717-626-4705
PETERMAN FARM
EQUIPMENT, INC.
225 York Rd.
Carlisle, PA
717-249-5338
WEB SNYDER, INC.
RD *1
Watsontown, PA
717-538-5555
County and nearby states.
The survey was conducted by a
team of research and extension
personnel with the aid of a $4,500
grant from the Delaware Soybean
Check-off Board. Purpose of the
study was to determine how widely
distributed the Dectes stem borer
is in Delaware and how much
soybean damage its larvae cause.
Hie survey was proposed after
the 1981 discovery of heavy Dectes
infestations in soybeans on three
farms in the Lewes-Milton area.
Besides monitoring adult
populations during the growing
season, the scientists also in
spected soybean stubble after
harvest last fall for presence of
overwintering larvae.
In most cases, Dectes adults
were found on ragweed growing
among soybean plants. Ragweed,
along with cocklebur, is one of the
insect’s major weed hosts. At some
sites, adult borers also were found
on soybeans. On at least two sites,
borers had infested an entire field,
even though no ragweed was
present.
Charles Mason, researcher with
the University of Delaware
Agricultural Experiment Station
who took part in the search, and
other entomologists are concerned
over the widespread presence of
Dectes in Delaware soybean fields.
“This little insect has caused
severe damage on only seven or
eight farms growing soybeans in
the state so far, but it’s a real
problem for the farmers who have
it,” Mason says. “They’re pulling
out their hair trying to control it.”
Though it is a relatively new
soybean pest in Delaware, Dectes
has been a serious concern of
North Carolina soybean producers
for several years.
To date, eight Delaware sites—
all in Sussex County—have been
found with Dectes-damaged
soybeans. Of the varieties tested,
POURED REINFORCED
CONCRETE CONSTRUCTION
• Circular Tanks
• Retaining Wa
• Gravity Fill St<
• Receiver Pits
• Slatted Floors
• Basements an
Building Foun
/0&i
fn ■
‘ M
SIZES & LAYOUTS TO YOUR SPECIFICATIONS
We are qualified to handle any poured concrete job you may
need. We use a practical aluminum forming system to create
concrete structures of maximum strength and durability. For a
highly satisfactory job at an affordable price, get in touch with us.
POURED FOR DURABILITY
Groffdole /IT
poured wallsMi
BRICK CHURCH RD. LEOLA, PA. 17540
FOR SALES & LAYOUT CONTACT:
GROFFDALE POURED WALLS (717) 656-2016
JAKE KING (717) 656-7566
Lancaster Fanning, Saturday, Aprils, 1983—PIS
Essex and Ware appear to be more
susceptible than others. North
Carolina entomologists say there is
evidence that larval feeding within
plants causes about 10 percent
yield loss. But most damage oc
curs from lodging after borers
hollow out stems as they tunnel
toward the base of the plants
where they overwinter. Depending
on the weather, over half the in
fested plants in a field may lodge
before harvest, making it difficult
to recover the beans.
Insect-induced lodging is most
severe in earlier planted beans,
Mason says, especially in fields
where soybeans were grown the
previous year and where beans
aren’t harvested promptly at
maturity.
“This insect appears to have
transferred from weedy hosts to
soybeans in some parts of the
state,” the entomologist says.
“Where it does reproduce in
soybeans, populations are
generally high enough to cause
economic losses.”
University extension en
tomologist Mark Graustein shares
Mason’s concern. At present no
pesticides are labeled for Dectes
control, and current cropping
practices on the Delmarva
peninsula appear to favor the
insect’s shift to soybeans.
“At this time we feel the only
way to control the Dectes stem
borer is to rotate out of soybeans if
at all possible,” Graustein says.
Preferably, growers should switch
to com or some other nonhost crop,
or try to grow soybeans on land
which has been used for these
other crops-especially fields
which are free of common
ragweed. He says damage from
lodging is most likely to occur on
no-till full-season soybeans
growing where soybeans grew last
year.