%—Lancaster Farming, Saturday, December 19,1970
Another Good Pennsylvania Corn Crop Forecast in 1971
(Continued from Page 1)
Jow leaf blight was a serious
problem last year
—'Keep plant density down.
High density results in more
moisture in the field Blight
thrives on moist conditions
“Even if the farmer knows his
■land is capable of growing high
densities, he should consider
backing off a little in 1971 as
protection against blight until
more resistant seed is develop
ed
—Spraying Though not now
a solution, a spray is being de
veloped that would hold off
blight a few days This could
be economical if blight strikes
at the critical stage of maturity
—Select hybrids that perform
ed well in 1970
Avoid Humidity
—lf the corn field is in a
river bottom or fog area, make
sure the seed showed a good
performance and tolerance to
blight in 1970.
The officials reported “a
dramatic difference” in blight
damage based on location On
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Speakers at the corn meeting at the Farm and
Home Center Wednesday night included these men:
left to right, John Weidman of the American Seed Trade
the Juniata River and Route 322, “Wherever there was good air cytoplasm just most all of female pollen and tasselnrg was
they found corn was veiy diainage this year, there was them,” Petersen said. no problem. These new non-pol
heavily blighted along the river, little blight,” Petersen said What is TMS 9 l en varieties were the Texas
but not along the road. The What Is Southern Blight? In breeding corn, Petersen ex- male sterile varieties,
only difference was in humidity. T . p al „ n plained, the female tassel need- Although the new TMS corn
“Whenever oM.c.ale wanted to "% a"Lud explanaMn of «I * fanned to gel; the de. Mentoyo otte^rn
tod Might this sear,” Petersen how the southern com blight s “' ed PMlmatuin But det f ss ' l , „ a o S lies tamed oS to be
said, “they went along a stream, mg required huge amounts of weak link, .they turned out to ne
where high moisture and hu ‘ labor, it was costly, and the time susceptible to blight,
nudity helped encourage heavy Peteisen explained that South- 0 f the tasseling was unpredicat- Petersen also thinks corn
blight. While moisture and ern leaf blight attacks only corn able, often occurring on Sunday breeders, in turning to a heavy
humidity generally help grow with the Texas male sterile and rainy days This compelled reliance on single cross corn,
good corn, this year it helped cytoplasm (TMS). “Not all corn seed firms to develop some got good results in the form of
also to encourage blight. varieties contain Texas male varieties which did not have the (Continued on Page 9)
Unhappily, when-you apply convention- process qiakes the phosphate Jn
al fertilizers, much of the phosphate Is PELS 700‘T available , yet maiceViVresistT -
locked up through fixation in the soil. fixation regardless of how it's applied!
□Up to now, this has _ mg DAnd when you plow
been fought by carefully IIOW I downUNlPELSinthefall,
placing the phosphate -f-lra r-» the phosphorus and oth
closer to the surface and er v ‘ ta * nutrients are
near each plant. Trouble - _ down in the moisture
is, this leaves your phos- zone where roots are
phorus supply ''high and most active in the hot,
dry" during the heat of B drysummer.DComesee
the summer. □ Or- jKj%A us soon about the
tho solved this ■ ■ ■■ ■ year ' round bene
problemduringthe IO I tits of fall fertiliza
development of tion with Ortho
UNIPELS. Aunique L%i| %J r /\| IV 1 UNIPELS theAll
"phospho - nitric" Ujf jfwill Wl ■ Season Fertilizer.
TM'S ORTHO, CHEVROM DISICV, UMPEI-RHC. U.S. PVT. OFF.
Association; Joe H, McGahan, extension agronomist;
Dr. Don Petersen, extension plant pathologist, and Dr.,
Robert Tetrault, extension entomologist.