Up Trial Data Silverleaf: wound infection, wound protection
Adrian Spiers - HortResearch, Palmerston Nort h



Table 1. Wound sealant trial conducted on hybrid willow: July 1984-April 1985


Depth of Stained Wood²


Butyl rubber

88.5

Red Lead paint

99.5

Tar - 9470

107.0

Pruntect

126.0

Tar - Duroid

136.6

Wattyl Masonry filler

137.5

Tar - 4250

162.0

Berger Actylic Paint

166.0

Berger Acrylic Paint + 1% captafol

171.0

Untreated control

128.5



LSD³ = 29.0


1. For each treatment 20 stems were treated
2. Depth (mm) of silverleaf infection from wound surface
3. LSD least significant difference (P<0.05)


Table 2. Trial Investigating fungicides applied in water at 3% ai for control of silverleaf infection conducted on hybrid willow - July 1985-January 1986

Treatment¹ fungicides


Depth of stained wood²

Common Name

Trade Name



pyrocarbolid

(Sicarol)

30.0

captan

(Captan)

31.2

dichlofluanid

(Euparen)

33.0

capatafol

(Difolatan)

35.0

capatafol

(Haipen)

43.5

ditalimfos

(Plondrel)

48.4

furmecyclox

(B 389)

58.5

etaconazole

(Sonax)

67.0

propiconazole

(Tilt)

71.5

oxycarboxin

(Plantvax)

71.7

benomyl

(Benlate)

73.5

saprol

(Saprol)

79.0

chlorothalonil

(Bravo)

80.5

triadimefon

(Bayleton)

81.7

bitertanol

(Baycor)

83.0

thiophanate

(Thiophanate)

88.2

benodanil

(Calirus)

91.5

8-hydroxyquinoline sulphate

(Chinosol)

94.0

dodine

(Melprex)

94.0

imazalil

(Fungaflor)

101.0

cycloheximide

(Cycloheximide)

141.0

copper oxychloride

(Cuprox)

180.0

copper salts of fatty & rosin acids

(Citcop 4E)

187.0

copper naphthenate

(Metallex)

220.5

Untreated


85.5



LSD³ = 14.4


1,2,3 See footnotes Table 1.



Table 3. Trial incestigating Incorporation of fungicides into various bases as wound dressings for control of silverleaf conducted on hybrid willow - July 1987-June 1988

Treatment¹

Depth of Stained Wood²


Butyl rubber + 3% dichlofluanid 3% propiconazole + etc4

29.9

Wattyl Masonry Filler + 3% captan + etc

39.0

3% dichlofluanid + 3% captan in water

55.0

Butyl rubber + 3% dichlofluanid + 3% bitertanol

63.0

Butyl rubber + 3% dichlofluanid + 3% pyrocarbolid

69.0

Butyl rubber + 3% dichlofluanid + 3% chlorothalonil

71.0

Butyl rubber + 3% captan + 3% pyrocarbolid

75.0

Butyl rubber + 3% captafol

84.0

Butyl rubber + 3% dichlofluanid

88.0

Taubmans All Weather Acrylic + 3% captan etc

126.0

Butyl rubber + 3% propiconazole

129.0

Butyl rubber + 3% dichlofluanid + 3% penconazole

133.0

Soil (applied directly to wound surface)

139.0

Butyl rubber + 3% penconazole

140.0

Yates Pruning Paint (10 g/L captafol)

140.0

Taubmans All Weather acrylic + 3% captan

150.0

Pruntect

153.0

Wattyl Masonry filler

153.0

Taubmans All Weather Acrylic Paint

156.0

Butyl rubber + 3% bitertanol

161.0

Vaseline + 3% hydroxyquinoline sulphate

165.0

Untreated control

150.0


LSD³ = 32.0


1-3 See Footnote Table 1.
4 Additional unspecified ingredients


Table 4. Silverleaf Wound Dressing Trial Conducted on Hybrid Willow - July 1990-July 1991

Treatment¹

Depth of Stained wood²


Mixture 1

6.0

Mixture 2 Formulations of the same

11.0

Mixture 3 base with various

13.0

Mixture 4 ingredients

15.0

Mixture 5

18.0

Shell Pruning Grease4

22.0

Pancil T (Rohm + Haas)

42.0

3% dichlofluanid + 3% captan in water

48.0

Lac-Balsam (Ciba-Geigy)

65.0

Yates Pruning Paint (10 g/litre chlorothalonil)

89.0

Pruntect

91.0

Dulux Timbacryl + 3% dichlofluanid + 3% captan

91.0

Yates Pruning Stick (copper oxychloride)

108.0

Control

88.0


LSD³ = 15.5


1,2,3 See Footnotes Table 1.
4Applied thickly


Table 5. Silverleaf Wound Dressing Trial August 1991-February 1992

Treatment¹

Depth of Stained Wood²


Mixture 1

2.0

Mixture 2

3.0

Mixture 3 Formulations of the

4.6

Mixture 4 same base with

4.9

Mixture 5 various ingredients

12.2

Mixture 6

12.9

Mixture 7

14.0

Shell Pruning Grease4

30.0

Pancil T (Rohm + Haas)

44.2

Bacseal (Bayer)

56.8

Mobil Grafting Compound

79.2

Pruntect

80.8

Lac Balsam (Ciba-Geigy)

83.3

Yates Pruning Paint (10g/litre chlorothalonil)

110.8

Untreated control

130.8


LSD³ = 31.0


1-3 See Footnotes Table 1.
4 Applied thickly


Table 6. Silverleaf Wound Dressing Trial August 1992-January 1993

Treatment




Host





Red Delicious

Captain Kidd

Granny Smith

Winter Nells

Black Cherries

Golden Queen

Plane Trees


Formulation 1

1.0²a¹

0.0a

0.0a

0.0a

27.8a

16.9a

0.0a

Formulation 2

5.5a

0.0a

0.0a

0.1a

31.4a

19.3a

0.0a

Formulation 3

8.3a

0.0a

0.0a

0.2a

35.8a

25.4a

0.0a

Control

29.3b

10.7b

8.2b

35.0b

99.8b

56.4b

53.8b

Mean wound diam (mm)

40

45

45

25

40

45

60


1 Tukey multiple range test results with letters in common are not significantly different at P<0.05
2 Depth silverleaf infection (mm)


Table 7.

Treatment

S. matsudana x S. alba

cv 1184

S. matsudana x S. alba

cv 1040


Trichoseal

41.5²a¹

69.4b

Trichospray

60.2b

53.7a

Control

60.1b

70.2b

% infected silverleaf

100

100


2 See footnotes, Table 6

Copyright © 1996 The Horticulture and Food Research Institute of New Zealand Ltd. All rights reserved. Reproduction in whole or in part in any form or medium without express written permission of The Horticulture and Food Research Institute of New Zealand Ltd is prohibited.