Vol. 16—1962 - NorthEastern Weed Science Society

Selective Herbicides for Several Crucifer CropsY Y
81
Rodger H'argan, Gao. Bayer, Joseph CialOneY
In NewYork about 16,000 aeres of cabbage, 5000 acres of cauliflower, and
about 2600 acres of broccoli are grown each season~ Almost the entire acreage
is transplanted rather than dffoeet field-seeded. For I!l8llY horticultural and
economic reasons reaearch workers and growers are investigating the technique
of field-seeding. Whereas witlf transp:J.4nts, the n~ for an herbicide is minor,
with field-seeding there is a'\I'Jmost impossible weedproblem unless an herbicide
is used.
The pu:rpose of the investigations being reported here was as follows:
1. To investigate crop residues with the more promising herbicides under
a wide range of so11 and weather conditions.
2. To evaluate weed control potential and crdp :r"esponse to the more
promising herbicides under the above conditions.
3. To evaluate in a limited fashion chemicals Just recently released to
research workers for their potential as herbicides ,in crucifer plantings.
, Field Evaluation of Promising Herbicides
For several seasons, resear~h in Virginia' and by the staff at Ithaca has
shown that, CDEChas potential for seeded and transplanted crucifers. In' 59
and '60 the authors found. Dactbal (DAC 893) to be promising. In 1960 Zytron
performed very well in a limited number of tests at Ithaca. In 1960 Dallyn
and Sav!yer (1) reported Dacthal as promising. That same season Sweet and
Cialone (2a, ze) reported combinations of CDECand CDAAas being worthy of
further trials.
Tests, were conducted in 1961 at 15 locations representing up-state New
York production areas for broccoli, cabbage and cauliflower. These tests
were designed to evaluate the promising materials noted above in regard to crop
response, weed control, and chemical residue in the crop under a wide range of
so11 and enVironmental conditions. In addition, tpe factor of field-seeding
vs. transplanting, was investigated with broccoli and cabbage. A summary of
peritnent conditions for each test is presented in Table l-
Each test COntained 4 replications with treatments randomized within each
replication. 'Plots were one row wide and 20 feet long. All liquid materials
were applied with a small plot, CO2, hand operated sprayer. Granulars were applied
with a small hand shaker.
~Paper No. 468. Department of Vegetable Crops, Cornell University, Itbaca,N.Y.
~Research Assistants.
J!Much of the work conducted away from Ithaca was supported by a grant in aid
from the Diamond-Alkali Company, Cleveland, Ohio.