Influence of Simulated Imazapic and Imazethapyr Herbicide Carryover on Cotton (Gossypium hirsutum L.)

Table 2

Cotton stunting as affected by simulated rates of imazapic and imazethapyr.^a

			2001		2002
Herbicide	Rate^b	Denver City	Munday	Yoakum	Denver City	Yoakum
	%
Untreated	—	0	0	0	0	0
Imazapic	1/64X	14	0	3	37	6
	1/32X	48	3	0	43	3
	1/16X	81	4	8	54	10
	1/8X	84	8	15	54	13
	1/4X	98	23	62	73	18
	1/2X	100	48	75	85	15
Imazethapyr	1/64X	8	0	3	32	8
	1/32X	17	3	0	33	8
	1/16X	60	1	0	53	5
	1/8X	70	1	4	64	4
	1/4X	89	6	45	77	3
	1/2X	100	16	53	89	4
LSD (0.05)		9	7	14	15	13

^aStunting ratings taken 7 weeks after herbicide application at Yoakum in 2001; 8 weeks after herbicide application at Denver City in 2001, Munday, and Yoakum in 2002; 9 weeks after herbicide application at Denver City in 2002.
^bHerbicide rate: 1.09 g ai/ha (1/64X), 2.19 g ai/ha (1/32X), 4.38 g ai/ha (1/16X), 8.75 g ai/ha (1/8X), 17.5 g ai/ha (1/4X), and 35 g ai/ha (1/2X).