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Tables from:


Mertely, J. C., Seijo, T. E., and Peres, N. A. 2010. Effect of pre- and post-plant fungicide and fertilizer treatments on infection by Colletotrichum acutatum, plant survival, and yield of annual strawberry in Florida. Online. Plant Health Progress doi:10.1094/PHP-2010-0125-01-RS.



Table 1. Effect of pre- and post plant treatments on the colonization of petioles by Colletotrichum acutatum, mortality, and yield of strawberries in the 2003-2004 season.

Treatment Product
/100
 gal
Petiole
colonization

(%)v
Plant
mortality

(%)w
Early yield
(lb/acre)
Late yield
(lb/acre)
Total yield
(lb/acre)
Pre-plant Wet control
(5-min dip in water)
nax 81.7 ay 1.7 c 5,500 ab 24,500 bc 30,000 abcd
Water (wash, 5-min dip) na 61.7 abc 2.5 bc 5,200 bc 25,900 abc 31,100 abc
Water (wash day before, store at 38°F, 5-min dip) na ND 5.0 bc 5,000 bc 24,200 bc 29,200 bcd
Brotomax (5-min dip 1%, 3 foliar appl. 0.5%) 1.0 gal,
0.5 gal
50.0 bc 3.3 bc 4,100 cd 23,700 bc 27,800 cd
Oxidate 27% H2O2
(5-min dip)
1 gal 66.7 abc 6.7 b 3,800 d 24,100 bc 27,800 cd
Abound 2.08F
(5-min dip)
8.0 fl oz 45.0 c 1.7 c 4,900 bc 27,000 ab 32,000 a
Switch 62.5WDG
(5-min dip)
6.5 oz 0.0 d 1.7 c 4,700 bcd 28,600 a 33,300 a
Post-plant Dry control
(no wash, no dip)
na 75.0 ab 1.7 c 5,500 ab 25,200 abc 30,700 abc
Surround WP
(no wash, no dip)
37.5 lb NDz 2.5 bc 6,600 a 27,300 ab 33,800 a
Osmocote Plus 15-9-12
(no wash, no dip)
na ND 12.5 a 4,100 cd 22,700 c 26,800 d

 v Percent petioles colonized by C. acutatum on 24 Oct 2003 (7 days after planting); only pre-plant treatments which could have affected petiole colonization and controls were evaluated.

 w Percent dead, dying, and severely stunted plants 5 weeks after planting.

 x na = not applicable.

 y Figures in a column followed by the same letter are not significantly different by Fisher’s protected LSD test (P < 0.05).

 z ND = Not Determined.



Table 2. Effect of pre- and post plant treatments on petiole colonization and isolation frequency from crowns of Colletotrichum acutatum, plant mortality, and yield of strawberries in the 2004-2005 season.

Treatment Product
/100 gal
Petiole
colonization

(%)v
Plant
mortality

(%)w
Isolation
frequency

(%)x
Early yield
(lb/acre)
Late yield
(lb/acre)
Total yield
(lb/acre)
Pre-plant Wet control (5-min dip in water) nay 98 abz 25.0 b 33.3 ab 1,000 b 5,400 bc 6,300 bc
Water
(wash, 5-min dip)
na 93 ab 34.2 ab 39.3 ab 600 b 2,900 c 3,500 c
Water (wash day before, store at
38°F , 5-min dip)
na 93 ab 25.8 b 26.3 b 900 b 5,700 bc 6,600 bc
Oxidate 27%
(5-min dip)
64 fl oz 100 a 44.2 a 48.1ab 500 b 2,800 c 3,300 c
Abound 2.08F
(5-min dip)
6.5 fl oz 90 b 5.8 c 51.7 a 1,700 a 7,500 b 9,200 b
Switch 62.5WDG
(5-min dip)
6.5 oz 35 c 6.7 c 8.9 c 2,300 a 16,200 a 18,500 a
Post-plant Dry control
(no wash, no dip)
na 95 ab 39.2 ab 38.6 ab 600 b 3300 c 3,900 c
Surround WP
(no wash, no dip)
25.0 lb 98 ab 37.5 ab 42.5 ab 700 b 4000 c 4,700 c
Osmocote Plus 15-9-12 (no wash, no dip) na 100 a 40.8 ab 55.9 a 300 b 3,200 c 3,500 c

 v Percent petioles colonized by C. acutatum on 28 Oct 2004 (9 days after planting).

 w Percent dead and dying plants 5 weeks after planting.

 x Percent living plants from which C. acutatum was isolated from the crown 7 weeks after planting.

 y na = not applicable.

 z Figures in a column followed by the same letter are not significantly different by Fisher’s protected LSD test (P < 0.05).




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