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Vol. 16—1962 - NorthEastern Weed Science Society

Vol. 16—1962 - NorthEastern Weed Science Society

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498<br />

1 . 1<br />

J. E. Gallagher and n. J. Otten<br />

The 1961 pre-emergenoe orabgrass oontrol trials compared<br />

the effectiveness of a number of cOllllllercial formulations" experimental<br />

materials from other companies, and a number of our own experimental·<br />

materials.<br />

Similar rates and dates of application were used in tests at<br />

three principal sites: AHCHEMResearch Farm, Ambler, h.; Oak Terrace<br />

Country Club, Ambler, Pa.; Pine Valley Golf Club" Clementon, N. J. Sites<br />

were chosen because they all had a past history of severe crabgrass Welt&­<br />

tiona. The turf at each site was rather thin" open and closely cut. : The<br />

natural turf at eachsite was a m1xture of bluegrass 'and fescue with sane<br />

bentgrass.<br />

All materials were applied as a dry foZ'lllUlation, usualJy on<br />

vermiculite or an organic carr:Ler. All materials were weighed out in advance<br />

according to the rate and plot size. Applicationa were made with a meo~ca1<br />

spreader or dusted on by hand, depending on the plot size.<br />

Plots at Oak Terrace CCwere ,f x 20f or 100 sq.tt.<br />

Plots a1l Pine Valley GCwere,f x 10' or ,0 sq.ft.<br />

Plots at AHCHEUResearch Farm were 18 n x 16.6f or 25 sq.tt •.<br />

A total of about 7,0 individual plots were applied at these<br />

three locations during the 1961 season. .<br />

1) Agricultural Research Departmen1i, AmchemProdUCts, Ina., 1\I1lbler,i'eansylvania

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