Vol. 16—1962 - NorthEastern Weed Science Society

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STVD~WITH SOLANJ/ FORTHECONTROLOF 1'iEEDSIN DIRECT~SEEDED m~
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:C. c. Wyatt ,V and R. J. Cond~JI
D~cJt-seeding of tomatoes is an ~ortant means of securing high:'
tomato plan~ populationespeoially with small determinate plants destined,for
use with on4e-over meohanical h&1"ll'ester. '. " ,
During the past five years studies of direot-seeded tomatoes haV'j9'~$en
oarrie4 out lin the...Bowling Green, Ohio area. The principal problem en~r'itered'
has been ~lW germ1nation and gr~ of tomat~ seedlings as compared to!Jl)rEl .
rapid gro .' of certain species r:eds in 0001 soil normally present ih'late
April and e rly May. '
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Sol4n ~-(3-chloro-4-~thYlphenyl)~2-methYlpentanamide) was reporied
by Sweet and lubatzky(l) to show promise as a seleotive pre-emergence herbioide
for direot-Eieeded tomatoes. During 1961 a series of tllO plantings of dfioect~
seeded toma~oes were made on Menn1ll Loam soil. and subsequently treatedWfth
Solan. 'j . .'
Procedure
Fol~owing preparation of the soil with a rototil1er, varieties ~ball
and Heinz 1~50 were seeded on May 4. Three replicates 72 feet each receiv:ed ,
Solan at th~ rate of four pouncl8 per acre in 60 gallons of water on May lJ;, and
May 15. Ap~lications were made with a hydraulic sprayer. On I~ay 11 a few
weed seedl1~s had emerged and tDmato seeds had sprouted but most had not:
broken through the soil surface. On May 15 twenty-five per cent of the tOmato
seedlings h~d emerged and a very large weed population was present. Just'~r1or
to cultivatibn on June 9 tomato seedling ani weed counts were made. Following
CUltivation on June 9 accurate
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records of the time to weed and block the plots
were made.
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'Follbwing preparation of the soil by harrowing, a second seeding or
Fireball wasj made on June 5. On June 9 Solan 1'8S applied to four replicatAls
of 72 feet each at the rate of 4 pounds per acre in 60 gallons of water. 'Many
weeds had broken through the surface of the soil on June 9 and the tDmato seed
had germinaf1ed. Tomato Seedling and weed counts were made on June 21.
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Results
Tomato and weed counts are reported in Table 1. The predominant weed
present in ~e nay 4 seeding was smartweed (Polygon1um Persicaria L.) with
lambs quarters (Chenopodium.M!mm. L. ), pigweed (Cb~OPOdium paganum 1'1eich.),
red-roof ( anthus retronexus L.) and crabgrass Digitaria sp.) alao pre~
sent. The p edominant weeds present in the June c;seeding were of the same
type indicat d above.
11 Registerf:Jd trademark of the Niagara Chemical Divis:iDn of Food Hachine17
and Chemlcal Corporation.
Y H. J. He~nz Conpany, Pittsburgh, Pa,
J! H. J. Heinz CompSlliY,Bowling Green, Ohio