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Vol. 16—1962 - NorthEastern Weed Science Society

Vol. 16—1962 - NorthEastern Weed Science Society

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THERESPONSEOF NUTGRASS TO HERBIC~I)]1:S<br />

APPLIEDAT V~ING STAGESOFGROW'rHl<br />

P. W. Sante~lII~ and J. A. ._Z.<br />

In recent years' NutgraS8(c;ntl~' esculentu.~)hasbecOllle more prev~lent<br />

in Maryland. There have been severa: reports published on nutgrass control<br />

and a regional bulletin is in press describing the life history and reproductive<br />

capabilities of this weed. Thf,spaper is an exten.~on of this work in Maryland.<br />

The promising' chemicals ctrft~ntly available ar~' adaptable only to nutgress<br />

growing in corn and potatoes. ll4lqce. the follow:l.ag,wot'k has been limited 'to<br />

pre-planting, pre-emergence and pq'~~emergence apPl'~tions in corn fields·in<br />

the Piedmont area of Maryland.<br />

'<br />

MATERIALSANDMETHO!)!)<br />

The matedal.were appliedil'l all three years (1959, 1960 and 1961) ,,1.th<br />

a Wcfd. sprayer deU"ring 30 spa. In 1959 and 19,fo the pre-plan~ing ~rWs<br />

were incorporated.y cross-discin, immediately at a'~pth of 3-4 inches. In<br />

1961 a garden type roto-hoe was used. Rainfall data,for the three years i~<br />

1:I.sII.d in Tablet., .<br />

TABLE1. Raiafall data (inches) for the years ~?5? 1960 and 1961•.<br />

at" tile location of ehe nutgrass coritr6t. l!!XPeriments. .<br />

..,.1959 'May 1960 June 1961<br />

3 0.3 1 0.34 9 0.25<br />

4 .Pre-plant ,8 1.5

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