Cotton host resistance as a tool for managing Rotylenchulus reniformis in Louisiana

Stand count, crop vigor, canopy coverage, and seed cotton yield of cotton cultivars planted at the MRRS field in 2023_ DAP refers to days after planting_ Values sharing the same letter within a column do not differ significantly (P-value>0_05)_

Cultivar	Stand Count (#/ha)			Vigor (%)		Canopy Coverage (%)		Seed Cotton Yield (kg/ha)
	14 DAP		28 DAP
DP 1646 B2XF	60,504	ab	67,302	70	bc	29	c	3,879
DP 2141NR B3XF	72,061	a	81,579	94	a	35	bc	3,982
PHY 340 W3FE	40,790	b	57,785	66	c	32	bc	3,646
PHY 332 W3FE	63,901	ab	64,578	83	ab	44	a	3,578
PHY 411 W3FE	66,622	ab	70,701	90	a	40	ab	3,938
PHY 443 W3FE	41,469	b	81,577	92	a	45	a	3,537
P-value	0.008		0.148	<0.001		<0.001		0.517

Soil population densities of reniform nematode (Rotylenchulus reniformis) at planting, mid-season, and harvest at the NERS field in 2022_ Values sharing the same letter within a column do not differ significantly (P-value>0_05)_

Cultivar	R. reniformis / 500 cm3 soil
	At Plant	Mid-Season		Harvest
DP 1646 B2XF	5,472	13,328	a	15,744	a
DP 2141NR B3XF	6,112	5,762	b	11,128	ab
PHY 332 W3FE	8,000	9,056	ab	9,088	ab
PHY 411 W3FE	8,832	8,096	b	6,688	b
PHY 443 W3FE	7,392	7,072	b	7,104	b
P-value	0.583	0.047		0.015

Soil population densities of reniform nematode (Rotylenchulus reniformis) at planting, mid-season, and harvest at the MRRS field in 2022_ Values sharing the same letter within a column do not differ significantly (P-value>0_05)_

Cultivar	R. reniformis / 500 cm3 soil
	At Plant	Mid-Season		Harvest
DP 1646 B2XF	20,384	23,232	a	47,616	a
DP 2141NR B3XF	17,152	13,200	b	27,776	ab
PHY 332 W3FE	17,408	12,416	b	22,016	ab
PHY 411 W3FE	25,952	14,184	b	14,144	b
PHY 443 W3FE	24,160	18,176	ab	26,304	ab
P-value	0.293	0.044		0.048

Stand count, crop vigor, canopy coverage, and seed cotton yield of cotton cultivars planted at the NERS field in 2023_ DAP refers to days after planting_ Values sharing the same letter within a column do not differ significantly (P-value>0_05)_

Cultivar	Stand Count (#/ha)		Vigor (%)		Canopy Coverage (%)		Seed Cotton Yield (kg/ha)
	14 DAP	28 DAP
DP 1646 B2XF	48,947	61,865	81	ab	60	b	2,743	bc
DP 2141NR B3XF	61,865	54,385	75	ab	78	ab	2,484	c
PHY 340 W3FE	43,508	46,906	70	b	64	b	2,360	c
PHY 332 W3FE	55,744	70,022	98	a	87	a	4,265	a
PHY 411 W3FE	53,706	62,545	76	ab	71	ab	3,625	ab
PHY 443 W3FE	41,469	45,549	78	ab	74	ab	2,743	bc
P-value	0.435	0.071	0.022		0.031		<0.001

Stand count, crop vigor, canopy coverage, and seed cotton yield of cotton cultivars planted at the NERS field in 2022_ DAP refers to days after planting_ Values sharing the same letter within a column do not differ significantly (P-value>0_05)_

Cultivar	Stand Count (#/ha)		Vigor (%)		Canopy Coverage (%)		Seed Cotton Yield (kg/ha)
	14 DAP	28 DAP
DP 1646 B2XF	92,457	67,302	68	c	22	b	3,192
DP 2141NR B3XF	108,091	95,175	75	bc	35	ab	2,899
PHY 332 W3FE	105,373	89,736	96	a	42	a	2,979
PHY 411 W3FE	99,255	89,057	88	ab	41	a	3,168
PHY 443 W3FE	105,373	98,575	95	a	41	a	3,256
P-value	0.714	0.164	<0.001		0.001		0.861

Stand count, crop vigor, canopy coverage, and seed cotton yield of cotton cultivars planted at the MRRS field in 2022_ DAP refers to days after planting_ Values sharing the same letter within a column do not differ significantly (P-value>0_05)_

Cultivar	Stand Count (#/ha)		Vigor (%)		Canopy Coverage (%)		Seed Cotton Yield (kg/ha)
	14 DAP	28 DAP
DP 1646 B2XF	65,263	67,302	76	c	30	b	1,551
DP 2141NR B3XF	67,984	67,984	84	b	35	ab	1,469
PHY 332 W3FE	90,416	87,018	98	a	39	ab	1,534
PHY 411 W3FE	77,500	79,541	97	a	41	a	1,528
PHY 443 W3FE	64,583	60,504	91	ab	42	a	1,578
P-value	0.160	0.171	<0.001		0.022		0.993

Soil population densities of reniform nematode (Rotylenchulus reniformis) at planting, mid-season, and harvest at the MRRS field in 2023_ Values sharing the same letter within a column do not differ significantly (P-value>0_05)_

Cultivar	R. reniformis / 500 cm3 soil
	At Plant	Mid-Season	Harvest
DP 1646 B2XF	4,480	8,576	95,740	a
DP 2141NR B3XF	5,504	4,160	66,896	ab
PHY 340 W3FE	4,096	6,016	87,984	a
PHY 332 W3FE	3,520	6,464	38,724	b
PHY 411 W3FE	4,672	3,200	45,696	b
PHY 443 W3FE	4,160	5,760	68,752	ab
P-value	0.924	0.786	0.048

Soil population densities of reniform nematode (Rotylenchulus reniformis) at planting, mid-season, and harvest at the NERS field in 2023_ Values sharing the same letter within a column do not differ significantly (P-value>0_05)_

Cultivar	R. reniformis / 500 cm3 soil
	At Plant	Mid-Season		Harvest
DP 1646 B2XF	704	10,624	a	77,696	a
DP 2141NR B3XF	2,624	3,520	b	39,940	bc
PHY 340 W3FE	2,560	11,520	a	73,216	ab
PHY 332 W3FE	2,432	3,200	b	31,488	c
PHY 411 W3FE	1,088	3,840	b	15,168	c
PHY 443 W3FE	320	4,288	b	20,736	c
P-value	0.218	<0.001		<0.001