Vol. 15—1961 - NorthEastern Weed Science Society

27.
(Lycbnis alba), cinquefoil (Potentilla recta), daisy fleabane (Erigeron
canadensiSY;-wild carrot (Daucus carota),
leucanthemum), and grass-leaved stitchwort
ox-eye daisy (Chqsantbemum
(Stellaria gram1nea)" were controlled.
At higher rates, with repeat applications,
tained on leafy sPUrse (Euphorbia esula),
promising results have been ob­
cypress spurge (Euphorbia cyparissias),
and on knapweed (Centaurea macuiosa).
Triazines: G..}2292, 0-}29ll, a-}4161, 0-;4162,
a ..,4690, a"34696, G..,4698, Atratone,
Atraz1ne, Ipaz1ne" Ipatone, Prometone
and Trietazine.
For the control of broad-leaved weeds and annual and perennial grasses,
the Tria~1nes have shown outstandins promise.
At rates of 1 to 2 pounds active I2r acre as at plantinS, pre--emergence
and·earlY post-emergence treatnentson corn, the control of broad-leaved
and annual grass .species has been excellent.
For quackgrass control in corn, applications of 2 pounds of Atrazine
before plowing followed by 1 to 2 pounds pre- or early post-emergence has
resulted in seasonal control. Applications of Amitrol-T at2 pounds before
plOWing plus Atraz1ne at 2 pounds as a pre --emergence treatment were just as
promising when acc0.lJlP&t1iedby early post--emergence cultivation.
A number of experiments show early post--emergence applications of Atrazine
a.t , to 4 pounds to give seasonal control of nutgrass.
In orcha.rds, the triazines in combination with amino triazole, da.lapon
and diuron show promise on apples. pears, plums, cherries and peaches. These
are a.pplied as early spring applications or follOWing cultivation.
Promising results are also reported for ornamentals and nursery stock.
The granulars look particularly promising for this field of weed control.
There 1s a. difference in the selectiVity of the range of compounds
avilable. Research results and observations during 1960 shoWgood weed control
in lima beans with Tr1etazine "1thout injury, possible control of horse nettle,
a tolerance of seedling legume species, pre- and. post·emergence applications
resulting in malformations in corn and variable resulta, as With other compounds
between granular and spray applications.
Vels1col 58-oS-l1
Field tests with this compound show good herbicidal activity on manybroadleaved
weeds and certain grass species.
Tests on dog fennel growing in wheat and barley resulted in good control
at 1/4 to 1/2 pound. per acre. other weed species grawies in cereals on which
control is indicated include si1nkweed wild buckwheat 1 mustards J horsetail
and corn spurry.
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