Efficacy of Herbicides When Spray Solution Application Is Delayed

Table 6

Palmer amaranth fresh weight reduction by 2,4-D, atrazine, dicamba, glufosinate, glyphosate, imazethapyr, lactofen, and paraquat 4 weeks after the manufacturer’s suggested weed size and 4 and 8 days after this weed size using spray solutions mixed the day of application or 4 or 8 days prior to application^a.

Timing of application after optimum weed size	Timing of solution preparation prior to application	Palmer amaranth fresh weight reduction
		2,4-D	Atrazine	Dicamba	Glufosinate	Glyphosate	Imazethapyr	Lactofen	Paraquat
Days	Days	%
0	0	55^a	72^a	97^a	96^a	85^a	27^a	93^a	62^a
4	0	55^a	72^a	55^a	98^a	79^a	40^a	86^a	73^a
4	4	50^a	63^a	34^a	81^a	85^a	14^a	88^a	82^a
8	0	59^a	60^a	72^a	97^a	74^a	8^a	88^a	56^a
8	8	50^a	47^a	37^a	100^a	81^a	19^a	92^a	78^a

aMeans within a herbicide followed by the same letter are not different at 𝑃≤0.05.