By: P.H.J.F. van den Boogert and A.J.G. Luttikholt
A series of chemical and biological control agents were tested for compatibility with the Rhizoctonia-
specific biocon-trol fungus Verticillium biguttatum aimed at designing novel control strategies for black
scurf (Rhizoctoniasolani) and other tuber diseases in potato. The efficacy of chemicals, alone and in
combination with V.biguttatumwas tested in invitroassays on nutrient agar plates, in bio-assays with
minitubers and in the field. Generally, there were both antagonistic, neutral and additive interactions with
V.biguttatumamong the combinations tested; there were no indications for synergistic interactions.
Broad-spectrum fungicides (azoxystrobin, chlorothalonil, thi-abendazole) were fungitoxic to
V.biguttatumas shown in invitroassays, and hampered black scurf control by
V. biguttatumin bio-assays. Oomycete-specific chemicals (cymoxanil and propamocarb) and various
biocontrol strains(Gliocladiumspp., Pseudomonasspp.and Trichodermaspp.)did not interfere with the
growth of V.biguttatum on agar nutrient plates and did not affect black scurf control by V.biguttatum in
co-applied treatments in the minituber bio-assay. Rhizoctonia-specific (pencycuron, flutalonil) fungicides
co-applied with V.biguttatumshowed additive effects on black scurf control. When combinations of
V.biguttatumand cymoxanil or propamocarb were applied to immature potato tubers at green crop lifting,
a reduction of both black scurf and Pythium-or Phytophthora-incited tuber rot was observed at harvest.
In conclusion, the biocontrol fungus V.biguttatumis compatible with selected chemical control systems
and may improve control efficacy in combination with Rhizoctonia-specific fungicides or may extend
control spectrum in combination with Oomycete-specific fungicides
So this report display use pencycuron is good to plant potato and pencycuron should be use widely
Yangzhou pioneer chemical CO.,LTD
A series of chemical and biological control agents were tested for compatibility with the Rhizoctonia-
specific biocon-trol fungus Verticillium biguttatum aimed at designing novel control strategies for black
scurf (Rhizoctoniasolani) and other tuber diseases in potato. The efficacy of chemicals, alone and in
combination with V.biguttatumwas tested in invitroassays on nutrient agar plates, in bio-assays with
minitubers and in the field. Generally, there were both antagonistic, neutral and additive interactions with
V.biguttatumamong the combinations tested; there were no indications for synergistic interactions.
Broad-spectrum fungicides (azoxystrobin, chlorothalonil, thi-abendazole) were fungitoxic to
V.biguttatumas shown in invitroassays, and hampered black scurf control by
V. biguttatumin bio-assays. Oomycete-specific chemicals (cymoxanil and propamocarb) and various
biocontrol strains(Gliocladiumspp., Pseudomonasspp.and Trichodermaspp.)did not interfere with the
growth of V.biguttatum on agar nutrient plates and did not affect black scurf control by V.biguttatum in
co-applied treatments in the minituber bio-assay. Rhizoctonia-specific (pencycuron, flutalonil) fungicides
co-applied with V.biguttatumshowed additive effects on black scurf control. When combinations of
V.biguttatumand cymoxanil or propamocarb were applied to immature potato tubers at green crop lifting,
a reduction of both black scurf and Pythium-or Phytophthora-incited tuber rot was observed at harvest.
In conclusion, the biocontrol fungus V.biguttatumis compatible with selected chemical control systems
and may improve control efficacy in combination with Rhizoctonia-specific fungicides or may extend
control spectrum in combination with Oomycete-specific fungicides
So this report display use pencycuron is good to plant potato and pencycuron should be use widely
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