Vol. 16—1962 - NorthEastern Weed Science Society

120
Tillam spray,:6 lb!A, and Daethal granular, 8'lb!A were superior to
other herbicide treatments on trarmplanted tomatoe;_ (Table 3). Eptam
grant1lar~ 4 lb!A, oause4 a burning of the new ~th and Amiben granular,.
5 lb!A, caused a moderate stunti~ of plants.
Calcoin pepper plants were aet in the field on May18 for the 1961
experiment. Rows.ere spaced 3, teet apart in:' plot that consisted ot'
3 rows 25 feet long~ Herbicide treatments were rePlicated three times 'in
randomized blocks.· :Eight weeke after traneplanting,-herbicidss were a,pplied
to cleanly cultivated aoil as 'described above for the 1960 experiment. '
Cultivation was discontinued except on the cultivated check plots after the
herbicides were, applied. ' "
Deleher toinatotransplant.e were set in the, field on May10, 1961. Rows
were spaced 5 teet apart in plots of 3 rows 25 feet long. Herbicide
treatments wer8~replicated four times in randomized blocks, and were &11­
plied asdescrUled above for the 1960 experiment. After this, as with the
pellper experiment, plots were not cultivated, except for the cultivated~
c~ck plots.
'Most treataenu-ti gave goocl to excellent weed control with no adver.
effect on y1elc:bl of both peppers and tomatoes. Results for the best
treatments for~eppers and tomatoes are presented in Tables 4 and 5, ~­
epectively. Various methods of soU incorporation of the over-all Tillam,
spray, 6 lb!A, were evaluated in both experiments. Rototilling 3 inchu
dee,'p, two, cul t1.Y,', ations, , inc}:l,of ir, rigation,l?r two cultivations follOwed'
by t, inch of irrigation were slightly better I118thodsof soU incorpora'\;ion,
as cOmpand with raking, inch deep, or by a single cultivation. Soil
i:';:orporation of TUlam granular, 6 lb! A, by! inch of irrigation, was;
superior to incorporation by two cultivations in both peppers and toma1;pes.
'!he best spray and granular applications of T1l1am were essentially equally
effective in each experiment. However, the spray aJ:Plication of T1l1alll'
caused a il1igl:1t burning of foliage, which was presumed to be, due to the;
solvent in the Tillam formulation. '!his was not noted in 1960.
Amiben granular was more effective when t inch of irrigation followed
application on peppers. This herbicide was not used on tomatoes in 1961
because of injury caused in 1960. Solan, 4 lb!A, plus Dacthal, 8 lb!A,
applied in an over-all spray when weeds were less than! inch high, was
v8r)""effective on tomatoes but gave severe injury on peppers. Stauffer
1870 spray, 61b!A, incorporated by two cultivations, was less effective
for weedco'ntrol than Tlllam applied s1mUarly.
Conclusionsi
The:.ltiLlowing herbicides were most effective for weed control in fieldseeded
peppers and tomatoes, Diphenamid, PCP, an:! KOCNplus TeA. Diphenamid
was slightJ.y more etfecti'Vl!l in the control ot annual grasses. 'ltiis
chemical was applied just after seeding at 3 lb!A on peppers and 5 lb!A on
tomatoes, and gave excellent control of both annual grasses and broadleaf