Vol. 16—1962 - NorthEastern Weed Science Society

Table 3 - Mean per cent brake control from August 7. 1958 to September 13.
1961 following treatment of plots with polyborchlorate November 13.
1957 and April 25, 1958.
X!!!: Per cent control Angle values
1958 66.6 54.7 a
1959 76.3 60.9 a
1960 81.9 64.8 b
1961 75.9 60.6 a
D for 1%level - 9.24. Valuesw~tb the same letteraranot significantly
different.
Table 4 shows while no differences existed between rates of application
for the spring treatments, the fall treatments did 8bow differences. The:
differences in brake control betwee.n means of the 400 and 500 pound rates' of
po1yborch1orate applied as a fall treatment were significant. Less brake
control was obtained with 500 poundBthan with 400 pounds. Atone 10caUOIl
brake control with the 500 pound rate of po1yborch1~ate wesnot as effective
as the 400 and 600 pound rates.
Table 4 - Mean per cent brake control for the fall aDd spring treatments of·
po1yborchlorate at 400, 500, and 600 pound rates.
1.4L21/181
Treatment I !a.!1_