Vol. 15—1961 - NorthEastern Weed Science Society

417.
The dosage rate of the systemic"
hormone or knockdown herbicide
generally follows the label recommendationa of the manufacturer or
formulator. In many cases, an on-the-sceneassessment of the weed
problem is made and dosage rates of an appropriate herbicide made
accordingly. Atrazine or Simazine was used in the various combinations
at rates of 5 - 10 Lbs , per acre. The amount of Atrazine or Simazine
in the combination is determined by the weed problem, time of application
and rainfall distribution.
1O\lJWATERGALLONAGEAPPLICJ\.TIONOF ATRAZINE
Atrazine 80Whas been successfully applied to railroad. yard and
branch line trackage at the rate of 12~ Lbs , per acre. The Atrazine
80wwas applied at a concentration of one pound of Atrazine OOWto
one gallon of water, making a total of l2~ gallons of water to apply
l2~ Lbs , of Atrazine 80w (10 lba. active) per acre. The Atrazine BOW
was easily
Successful
maintained in suspension with a recirculation pump.
weed control for a full season was achieved from a 10 lb.
per acre application of Atrazine applied early post-emergence to a
mixture of annual and perennial broadleaf weeds and' grasses. When
water is at a premium or wh~ it is desirable to make spray equipment
cover more acreage with less water, Atrazine BOWlends itself to this
type of application.