Vol. 16—1962 - NorthEastern Weed Science Society

Results and Discussion. The data, particularly for the herbicides, were
sim:l.lar on both vari.eties; therefore, only the results on Barly Harvest
are given in this paper. Differences which did occur in the Sweet Spanish
experiments are ,mentioned in the text.
111
Table 1.
Results from the seasonal trial are summarized in
Table 1. Results from several herbicides used on Early Harvest onions during
the growing seaeon, , Treatmmts were applied 5/B, 6/13, 7/5 and
7/2B; crop.harvested 8/8. ' '.
Treatment
1. CIPC 4 lbs/X (3 Ibs 5}8)
2. CIPC + Vegadex 4+1 Ibs/A n that they improved grass control. 'The deletion of the
first spray (May 8) involving any of these three materials was unacceptable
because of reduced control up to July 3 when the third application went on.
Zytron at five pounds per acre was comparable to the:standard but only the
ten pound rate gave good control of grass. This higher rate reduced yileld
when applied four times but, in treatJll)l1t #9, where the first application
was left out, good grass control was obtained without affecting yield.
The material looked prom:l.sing and should be tried in conjunction with tbt
use of CIPC early in-the season. Dacthal looked \fel'y good and rates up to
12 pounds per acrewet'e used throughout the seaecn without affecting the
onions. None of the treatments had any effect on yield ot the Sweet Spanish
variety. Prospects are reasonably good that our current seasonal recommendation
will be able to be improved.