Allelopathic Potential of Green Manure Cover Crops on Germination and Early Seedling Development of Goose Grass [Eleusine indica (L.) Gaertn] and Blackjack (Bidens pilosa L.)

Table 8

Effect of soil-incorporated biomass of different plant parts of cover crops on the emergence of goose grass.

Cover crop	Leaf	% inhibition	Stem	% inhibition	Root	% inhibition	Mean % inhibition	Rank
Emergence (%)
Control	98.3^e		98.3^e		98.3^e
Hyacinth bean	44.4^a	55	38.1^ab	61	32.5^ab	67	61	1
Red sunnhemp	45.7^a	54	56.9^cd	42	42.5^bc	57	51	6
Showy rattlebox	88.0^de	10	89.0^e	9	86.0^e	13	11	10
Common bean	75.0^cd	24	68.5^d	30	63.5^d	35	30	9
Common rattlepod	43.5^a	56	43.5^abc	56	31.5^ab	68	60	3
Radish	48.0^a	51	42.0^abc	57	26.0^a	74	61	1
Tephrosia	57.5^ab	42	35.5^ab	64	44.5^bc	55	53	5
Black sunnhemp	71.0^bc	28	29.0^a	70	44.5^bc	55	51	6
Dry weight (g)
Control	1.14^ef		1.14^b		1.14^c
Hyacinth bean	1.13^ef	1	0.09^a	92	0.06^a	95	63	8
Red sunnhemp	0.24^ab	79	0.04^a	96	0.03^a	97	91	3
Showy rattlebox	0.87^de	24	1.28^b	−12	0.32^b	72	28	10
Common bean	0.42^abc	63	0.05^a	96	0.03^a	97	85	4
Common rattlepod	0.25^a	78	0.02^a	98	0.02^a	98	92	2
Radish	0.72^cd	37	0.05^a	96	0.04^a	96	76	6
Tephrosia	0.81^de	29	0.02^a	98	0.04^a	96	75	7
Black sunnhemp	0.58^bcd	49	0.01^a	99	0.03^a	97	82	5
Seedling vigor index (SVII)
Control	9.75^de (111.78)		9.75^de (111.78)		9.75^de (111.78)
Hyacinth bean	6.86^bc (49.91)	55	1.86^ab (3.74)	97	1.34^a (1.63)	99	84	8
Red sunnhemp	3.06^a (10.66)	90	1.63^ab (2.46)	98	1.37^a (1.51)	99	96	3
Showy rattlebox	8.62^cd (76.62)	31	10.64^cd (114.16)	−2	4.96^b (25.83)	77	35	10
Common bean	5.59^b (35)	68	1.84^ab (3.29)	97	1.42^a (1.68)	98	88	4
Common rattlepod	3.30^a (11.02)	90	1.22^a (11.48)	99	1.00^a (0.56)	99	96	2
Radish	5.78^b (36.38)	67	1.55^ab (2.18)	98	1.18^a (0.95)	99	88	6
Tephrosia	6.81^bc (48.22)	57	1.11^a (0.77)	99	1.41^a (21.63)	99	85	7
Black sunnhemp	6.38^b (42.20)	62	1.55^a (0.53)	100	1.44^a (21.76)	98	87	5

Means followed by the same letter in the same column are not significantly different at . , , and represent species with mean inhibition over control ≥80%, ≥50%, and ≥20%, respectively. Data were √ (x + 0.5) transformed. Untransformed data given in brackets were used to calculate the inhibition percentages.