Vol. 16—1962 - NorthEastern Weed Science Society

Table 1. Seeding and Weed Counts on Field-Seeded ~to Plots Treated With
Solan Premergence.
125
Lbs of Active Broadleaf Weed Grass
Treatment Chemical Acre Count 6 Sq.F~
Solan, 1 ~ek 4 .t.99.6 24.6
After· Seeding
Solan, Just Be~ 4 20.0 6.6 56.0
fore Seedling
Emergence
Check 46.0 318.0 20.0
L.S.D. 5% 21.9 95.4 N.S.
L.S.D. 1% N.S. 158.3 N.S.
B. Seeded June 5
Solan, JUst Before
Seedling
4 51.5 4.8 1105
Emergence
Check 4 53.7 109.2 5405
L.S.D. 5% N.S. 37.8 27.2
L.S.D. 1% N.S. 55.9 hO.2
Significant control of broadleaf weeds was obtained with all treat~
ments of Solan. Control of grasses was not significant in the '~ay 4 seeding,
but was significant in the June 5 seeding, after pre-emer-gence Solan treatment.
A significant reduction in seedling stand was recorded just prior to
emergence treatment, May 15. Following applications of Solan en May 15,
emerged tomato seedlings were either killed or severely injured. No reduction
in seedling at and was obtained with other treatments.
The man-hour-s required to hand-weed and block the May 4 seedling stand
were recorded on June 9. The man-hour-e required to block and weed tre treat~
ments was 14.2 and 23.8 for 4 pounds Solan just prior to emergence and one
week after seeding, respectively, and 31.2 hours for the untreated plots.
Because weeds and tomato seedlings were large, it follows that the man-hours
required to block and weed the treatments was greater than normally anticipated
for all treatments.
Summary
Excellent broadleaf weed control was obtained in plantings of directseeded
tomatoes with pre~emergence treatments of 4 pounds Solan per acre. No
reduction in the stand of tomato seedlings was obtained when Solan was applied
prior to emergence of seedlings.