Vol. 51—1997 - NorthEastern Weed Science Society

117
Table 1. Percent g een cover ratings in areas treated with preemergence herbicides on June 27 or
July 8, 1 . The June 27 applications included glyphosate at 21b/a. On June 27
glyphos e or glufosinate, at 21b/a, were applied to areas on which the preemergence
herbicid were applied on July 8.
Rate
% Oreen Cover l l
Chemical (lblA) July 22 August 22 October 24
Control 82a 98a 90a
Thiazopyr + Olyp osate 0.5 + 2.0 5he 10 cdef 7 e
Thiazopyr + Olyp osate 1.0 + 2.0 8he 28 bed 33 bed
Thiazopyr + Olyp osate 2.0+ 2.0 10 he 18 cde 33 bed
Thiazopyr + Ox uorfen + Olyphosate 0.5 +1.6 + 2.0 14 b 43 b SOb
Thiazopyr + Oxy uorfen + Olyphosate 1.0 +1.6 + 2.0 9bc 30 he SOb
Thiazopyr + Oxy uorfen + Olyphosate 2.0 +1.6 + 2.0 14 b 27 bed 48b
Oxyfluorfen + 01 hosate 1.6 + 2.0 5he 25 bede 45 be
Oryzalin + Oxyfl rfen + Olyphosate 4.0 +1.6 + 2.0 5he 28 bed 33 bed
01 hosate 2.0 7bc 22 cde 35 bed
Thiazopyra 0.5 9he 20 cde 43 be
Thiazopyre 1.0 4c 8 def 13 de
Thiazopyr-' 2.0 3 c 6 ef 11 de
Thiazopyr + Oxy uorfena 0.5 + 1.6 2 c 4 f 6 e
Thiazopyr + Oxy uorfenll 1.0 + 1.6 2 c 3 f 4e
Thiazopyr + Oxy uorfen-' 2.0 + 1.6 1 c 1 f 2 e
Oxyfluorf enll 1.6 1 c 4 f 6 e
Oryzalin + Oxyfl orfenll 4.0 +1.6 2 c 4 f 11 de
Olyphosate1l 2.0 2 c 9 def 33 bed
Thiazopyrk 0.5 lhe 3 f 4e
Thiazopyra 1.0 1 c 3 f 5 e
Thiazopyr" 2.0 1 c 3 f 5 e
Thiazopyr + Oxy 0.5 + 1.6 1 c 4 f 6 e
Thiazopyr + Oxy 1.0 + 1.6 1 c 2 f 3 e
Thiazopyr + Oxy 2.0 + 1.6 1 c 1 f 1 e
Oxyfluorfene 1.6 1 c 1 f 1 e
Oryzalin + Oxyfl orfe~ 4.0 +1.6 1 c 1 f o e
Glufosinatek 2.0 1 c 1 f 5 e
11 Means within olumns, followed by the same letter, do not differ at the 5% level of significance
(DMRT).
1l Applied July , 1996. Olyphosate (Roundup Pro) was applied at 2lb/a on June 27.
2LApplied July 1996. Olufosinate was applied at 2lb/a on June 27.