Vol. 16—1962 - NorthEastern Weed Science Society

226
Chemical Control
of ~1¥1~s and ,Nutgr&l!/JiinINursl!ry Liners
by Johh F. Ahrens 1
Quackgran .(Agropyron raPins) is )d.dely distributed in nursery plantings
and occasionally lias mte n the abandomment of fields forornam.ental. 1t
Nutgrass (Cyperus esculentUs) is less frequent in Co nrle Cl t :lcut nursery
but also pl-8ll,itings
MS been dillicurt and expensive to control. The use of simaziNlfor
controlling annual weeds in nursery liners is becoming an accepted pract~~.
The objective of this study' was to evaluate chemical.J\leans of controlling:quackand
nutgrass in nursery liners with and without the p~ ,of sima~ine for 8Rl'!ual
weed contrOl.' "
\ ') ~ ::,.
Materials
and Methods
The area.aeleoted for the test was infested with a denseetand of q~kgrass.
Although nutgraBs plante were not in great abundance,t:h,esoil was infes~ with
tubers. The soil texture was a silt loam. The heavy growth 'of grass was mowed,
raked and fertilized with 560lbs./A of 8-12-12 fertilizer on October12,l960.
The quaokgrass was groting .v~r~: on October 26 when ~e fall trea:tIneQts
were applied on 61 x 12 1 plots replicated three times. '1'he!cllowing mat8ii'ials
were used in this test: '
a) &mitrol (J-amino-l,2,4 triazole) 50%water soluble powder '
b) atrazine (2-ohloro-4-(ethylamino)-6-(isoprop,ylamino)~~riaZine)~ W.P.
0) dalapdn; (2,2 dichloropropionic acid) sodium salt . " '
d) EPTC (ethyl di-n-prop,ylthiolcarbamate) 5%G. .
e) propazine (2-chloro-4,6-bis (isoprop,ylamino)-s-triazine) 50%W.p. .
f) simazine (2_chloro-4,6-biS (ethylamino)-s- triazine) 80%W,P. and 4% G.
The fall treatments were applied in 70 gallons of solution per aore with
a knapsack sprayer.
rate of ! teaspoon
Dupon,tspreader-stioker
per gallon of spray.
was added weach solution
'
at ".
_.
The area 'was disked on April 9, and again on April 20, after granular \EPTC
was applied by hand to the lIIOist soil in one, set of plots. The ground W8(p'lowed
and disked on AprU 22, and on April 24, the .followingdcinds and numbers' o.t
nursery stock w~re ,planted in each plot and t~immed to uniform sizes:
Fors 1& ~termed1a. 1 to 2 year old - 5 plants per plot
her s a oblca, 2 year'liners - 3 plants per plot "
tsuga cans ens s, 3 year seedlings - 6 plants per plot
~ ~ ~, 2 year liners - 5 plants per plot
Eleven days after planting, the rowllwere ouJ,t:LVf,tedand granular simazine
was applied over half the plots at a rate of 3 lbs./A. A lawn spreader with
large wheel.s was used to apply ,the ,granular ,simazine. ., '
, ,
..' .
1 Assooiate Plant Fhys.iologiat, C.onneet1outAgrieultDal .llltperi~EI1t Station,
Windsor ,,;
fj'