Tree Pathogen Survival in Chipped Wood Mulch

Article Figures & Data

Download figure
Open in new tab
Download powerpoint
Figure 1.
Percentage of fungal pathogen recovered and percentage of moisture from infested wood pieces in a landscape mulch layer (experiment three).

Table 1.

Percentage of Thyronectria austroamericana recovered from uncomposted infested honeylocust wood pieces.

Length of time on/in mulch layer (weeks)	Collection date	Percentage recovered
		Position^z		Irrigation treatment^y
		Position^z		High		Low
		Surface	Buried	Surface	Buried	Surface	Buried
Experiment One
1	08/10/98	92.9 a^x	96.1 a	96.9 a	100.0 a	89.1 b	92.2 a
3	08/24/98	68.8 a	86.7 a	79.7 a	92.2 a	57.8 b	81.3 a
5	09/07/98	46.8 b	85.1 a	37.5 b	85.9 a	56.2 a	84.4 a
7	09/21/98	63.3 a	66.4 a	79.7 a	78.1 a	46.9 a	54.7 a
9	10/05/98	30.5 b	85.2 a	35.9 b	78.1 a	25.0 b	92.2 a
Experiment Two
2	09/14/98	38.3 b	91.4 a	45.3 b	92.2 a	31.2 b	90.6 a
4	09/28/98	10.2 b	94.5 a	7.8 b	92.2 a	12.5 b	96.9 a
6	10/12/98	9.4 b	88.3 a	14.1 b	89.1 a	4.7 b	87.5 a
8	10/26/98	10.9 b	80.5 a	21.9 b	81.2 a	0.0 b	79.7 a
10	11/09/98	24.2 b	93.8 a	31.2 b	93.8 a	17.2 b	93.8 a
Experiment Three
2	08/24/99	88.7 a	80.5 a	87.5 a	75.8 a	89.8 a	85.2 a
5	09/14/99	68.0 b	83.6 a	80.5 a	80.5 a	86.7 a	52.3 b
23	01/19/00	89.8 a	53.1 b	89.1 a	48.4 b	90.6 a	57.8 b
31	03/13/00	82.0 a	51.2 b	86.7 a	54.7 b	77.3 a	47.7 b
40	05/15/00	73.8 a	48.4 b	78.9 a	44.5 bc	68.8 ab	52.3 b
59	09/26/00	58.9 a	58.9 a	64.8 a	53.1 a	53.1 a	64.8 a
98	06/19/01	15.6 b	31.2 a	25.0 a	39.8 a	6.2 b	22.7 ab
143	05/09/02	23.4 a	24.2 a	30.5 a	22.6 a	16.4 a	25.8 a

↵^z Position: Surface wood pieces were placed on mulch layer surface, and buried wood pieces were buried 10 cm (4 in.) in mulch. In experiments one and two, N =16; in experiment three, N = 32.
↵^y Irrigation: Low irrigation sites received 40% ET, and high irrigation sites received 160% ET. In experiments one and two, N = 8; in experiment three, N = 16.
↵^x Means followed by the same letter are not significantly different at the P = 0.05 level at a particular date for position or irrigation treatment.

Table 2.

Moisture percentage of wood pieces inoculated with Thyronectria austroamericana and placed in landscape wood chip mulch.

↵^z Position: Surface wood pieces were placed on mulch layer surface, and buried wood pieces were buried 10 cm (4 in.) in mulch. In experiments one and two, N = 16; in experiment three, N = 32.
↵^y Irrigation: Low irrigation sites received 40% ET, and high irrigation sites received 160% ET. In experiments one and two, N = 16; in experiment three, N = 32.
↵^x Data not collected.
↵^w Means followed by the same letter are not significantly different at the P = 0.05 level at a particular date for position or irrigation treatment.