Vol. 16—1962 - NorthEastern Weed Science Society

196
left in the container from Whilih the herbiCide _~oniy verified the
grower I s estimate of the rate used. We aSBuplean even application was made.
6imaz1ne applied on sand;y soU lo,,·in organic matter is harmful to gladiolus.
A home garden gladiolus entbU8!e.st treated corn in 1960 with 1 to 2
pounds of simazine per acre. . The following year he. planted gle.d:+olus co;rmels
on this 8ameso11. .The gladiOlU8'folill8e was b~'liurned and manyplant"
M~ . . ... ~ . ," .
In the semeyears, at the OrnamenteJ.s Rfilsee.rCll:)h~atory, gladiOl~'
cormels were planted in the sprins-of 1961 inso:O. treated in 1960 with ~ ,10
pound. rate of Bimaz1ne1n theepritlgfollowed bY'-Ei.;n5 pclund rate in the-t~'.
Corm yield in the treated soU was 346'grams of c~ ~er 4-foot plot· c~ed
to 454 pamS1'1'Omthe previously untreated soil.ttiisreduction in yiel4,
from a soil rece1vi~ a high rate6f itimazinewas 1:ess'l!ievere than that>
sustained by the home·gardener we-used a muchl~re.te. In. soUtr~~t~d
in 1960 withatrazineat the s8lllerates as the. Simzine,thei961 yield we;sreduced
to, 129 grams of cOrms :f'rOiDa 4 foot plot. "JAti-az:bie is reportt'd 1;l)
be much IIIOreharmful to gladiolus than simazine (2). . ,-
JUNIPER
Most evergreens are qUite toienmt to simazine:!his information ~~
been reported ~ times in papers -from experimenti'1rtationsand in reports
from commer-e:LaJ. nurseries. Tbfsihae been summarized in anew bulletin b~
Ahrens (1). On LOZlg-ISland, tWb eXperimental plantt!:igsofHetz juniper vere
tolerant to two yearly applications of simazine at 6 to 10 pounds per acre.
These plantings received treatment s starting 1 or 2 weeks after the small
liners were transplanted into the field. A landscape. gardener made 11:, plfl,llting
of Andorra juniper and' some 'siJIel1 ornemente1 trees:bn II- steep bank in t~.
rear of a customer' shouse. The soU was a poor, ~ subsoU norlllllll.1'"
used as backfUl. To control weeds, the landsC~'8.pplied. granular simazlne
to the planting at 'Which he thought was 'the recoiimehd'eli rate. There was .
excellent Wed control. SoonlllOa'b of the junipers-:were d;y1.ngand some ot.._
the new follage on.the small trees, especially chem, .showed symptoms'of
silllG.lllneinjury. The lawn below the beJJk had sti- 13aks of 'dead grass Where'
simazine had: wuhed'trom the bailk •. eateful inveljltiP.tion ShoWedthat the •.
actual alIIOuntused'we.enever lllE!88U1'edbut a conse~lve' eljltilll8te wasat
least 16 pounds actuaJ. simazine pel' acre. "'" .
EDGLIBH', IVY
On another bank of'sand;y soU'a planting of' En&Llsb;'ivy was care~
treated by a home owner with aimalline granular at8 'poundS actual per acre.
The high ratewea used to el1m8tequa.ckgrass. Sev~e injury resulted exdept
Jsoll.
Where much peat moss had been lIieor;Porated into the- Prelim1narytests
at the Cornell ~teJ.s Researcli Laboratory endEd; Salisbury Park by-the
Nassau County ~ultural Ex'tension Service showed S~ilieto be a .'
promising herbicl4e for English ivy and several cith'e'rgr-ound covers. Ivy'
at the park received 12 pounds ot simaz1ne one year and 4 more the next.
This was on heavy Hempstead loam to Which peat IIIOss..~h¢ been added. Lar~~;,.c
~lJ
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