Abstract
Trifloxystrobin, a new strobilurin fungicide, is active against a wide range of fungal plant pathogens. The present study shows that trifloxystrobin is effective for controlling the oomycete fungal pathogen Plasmopara viticola (Berk. & M.A. Curtis) Berl. & De Toni in Sacc., which causes downy mildew, and the ascomycete Uncinula necator (Schwein.) Burrill, which causes the economically more important powdery mildew of grapevines. Laboratory experiments revealed that a concentration of 0.1 µgmL–1 of trifloxystrobin WG 50 completely inhibited sporangial germination of P. viticola. Trifloxystrobin was very effective against the conidial germination of U. necator in vitro and it inhibited mycelial growth and sporulation of both fungi in vivo. Trifloxystrobin showed strong prophylactic and local activity in intact plants and detached leaf disks; suppression of U. necator was demonstrated by the reduction of existing colonies when it was applied to mildewed leaves. Trifloxystrobin was as suppressive as sulfur and superior to sterol inhibitor fungicides when applied to heavily powdery mildew infected fruit clusters of field-grown grapevines. Trifloxystrobin had a translaminar activity, but failed to translocate via the vascular system. Two foliar applications of trifloxystrobin, 2 weeks apart, to field-grown grapevines inhibited downy mildew development and were as effective as the standard metalaxyl-Cu treatment in controlling the disease. Prophylactic applications of trifloxystrobin at 100–150 mgL–1 were superior in performance to sterol inhibitor fungicides and sulfur applications and provided the best control against powdery mildew under heavy infection pressure in field-grown grapevines. The inhibitory effectiveness of trifloxystrobin makes it well suited for integration into control programs against powdery and downy mildew diseases in vineyards, and as a component of resistance avoidance strategies. La trifloxystrobine, un nouveau fongicide de la famille des strobilurines, agit contre un large spectre de phytopathogènes fongiques. La présente étude montre que la trifloxystrobine est efficace pour lutter contre le Plasmopara viticola (Berk. & M.A. Curtis) Berl. & De Toni in Sacc., un oomycète responsable du mildiou, et l'Uncinula necator (Schwein.) Burrill, un ascomycète responsable d'une maladie économiquement plus importante, l'oïdium de la vigne. Les expériences de laboratoire ont montré qu'une concentration de 0,1 µg·mL–1 de trifloxystrobine WG 50 inhibait complètement la germination des spores du P. viticola. La trifloxystrobine a été très efficace à contrer, in vitro, la germination des conidies de l'U. necator et à inhiber, in vivo, la croissance mycélienne et la sporulation des deux champignons. La trifloxystrobine affichait une activité prophylactique et locale élevée avec des plantes intactes et des disques de feuilles détachées; la répression de l'U. necator a été démontrée par la réduction des colonies présentes sur des feuilles atteintes d'oïdium sur lesquelles elle avait été appliquée. La trifloxystrobine avait un pouvoir de répression aussi grand que le soufre et supérieur à celui des fongicides inhibiteurs des stérols lorsqu'elle a été appliquée sur des grappes de raisins récoltées au champ et gravement atteintes d'oïdium. La trifloxystrobine avait une activité translaminaire, mais n'était pas transportée par le système vasculaire. Au champ, deux applications foliaires de trifloxystrobine, à deux semaines d'intervalle, ont arrêté le développement du mildiou sur des vignes et ont été aussi efficaces que le traitement témoin au métalaxyl-Cu pour réprimer la maladie. Des applications prophylactiques de trifloxystrobine, à des concentrations de 100–150 mg·L–1, avaient un rendement supérieur à celles de fongicides inhibiteurs des stérols et de soufre et ont lutté plus efficacement contre l'oïdium affectant des vignes au champ dans des conditions de forte infection. L'effet inhibiteur de la trifloxystrobine en fait un outil adapté à l'incorporation dans des programmes de lutte contre le mildiou et l'oïdium dans les vignobles et en tant qu'élément dans des stratégies pour éviter l'apparition de résistance.
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Claims 13
Claim · model-written summary
Trifloxystrobin fully inhibited P. viticola sporangial germination at 0.1 µg per mL.
- Treatment
- 0.1 µgmL1 of trifloxystrobin WG 50e0
- Interactor
- P. viticola
Plasmopara viticolae0pathogen - Outcome
- sporangial germination of P. viticolae0
- Direction
- completely inhibitede0
VitisNot reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“a concentration of 0.1 µgmL–1 of trifloxystrobin WG 50 completely inhibited sporangial germination of P. viticola”
t0“grapevines”
Claim · model-written summary
Trifloxystrobin inhibited U. necator conidial germination in vitro.
- Treatment
- Trifloxystrobine0
- Interactor
- U. necator
Erysiphe necatore0pathogen - Outcome
- conidial germination of U. necatore0
- Direction
- very effectivee0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Trifloxystrobin was very effective against the conidial germination of U. necator in vitro”
t0“grapevines”
Claim · model-written summary
Trifloxystrobin inhibited mycelial growth and sporulation of both fungi in vivo.
- Treatment
- Trifloxystrobine1
- Outcome
- mycelial growth and sporulation of both fungie0
- Direction
- inhibitede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“it inhibited mycelial growth and sporulation of both fungi in vivo”
e1“Trifloxystrobin had a translaminar activity”
t0“grapevines”
Claim · model-written summary
Treatment reduced existing U. necator colonies on infected leaves.
- Organ / stage
- leavese0
- Treatment
- Trifloxystrobine1
- Interactor
- U. necatorErysiphe necatore0pathogen
- Outcome
- existing coloniese0
- Direction
- reductione0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“suppression of U. necator was demonstrated by the reduction of existing colonies when it was applied to mildewed leaves”
e1“Trifloxystrobin had a translaminar activity”
t0“grapevines”
Claim · model-written summary
On infected grape clusters trifloxystrobin suppressed powdery mildew as well as sulfur.
- Organ / stage
- fruit clusterse0
- Treatment
- Trifloxystrobine0
- Outcome
- powdery mildewe0
- Direction
- as suppressive ase0
- Comparator
- sulfure0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Trifloxystrobin was as suppressive as sulfur and superior to sterol inhibitor fungicides when applied to heavily powdery mildew infected fruit clusters of field-grown grapevines”
Claim · model-written summary
On infected grape clusters trifloxystrobin outperformed sterol inhibitor fungicides.
- Organ / stage
- fruit clusterse0
- Treatment
- Trifloxystrobine0
- Outcome
- powdery mildewe0
- Direction
- superiore0
- Comparator
- sterol inhibitor fungicidese0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Trifloxystrobin was as suppressive as sulfur and superior to sterol inhibitor fungicides when applied to heavily powdery mildew infected fruit clusters of field-grown grapevines”
Claim · model-written summary
Trifloxystrobin showed translaminar activity.
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Trifloxystrobin had a translaminar activity”
t0“grapevines”
Claim · model-written summary
Trifloxystrobin failed to move through the vascular system.
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“failed to translocate via the vascular system”
e1“Trifloxystrobin had a translaminar activity”
t0“grapevines”
Claim · model-written summary
Two foliar applications inhibited field downy mildew development.
- Treatment
- Two foliar applications of trifloxystrobin, 2 weeks aparte0
- Outcome
- downy mildew developmente0
- Direction
- inhibitede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Two foliar applications of trifloxystrobin, 2 weeks apart, to field-grown grapevines inhibited downy mildew development”
Claim · model-written summary
Two foliar applications matched metalaxyl-Cu for downy mildew control.
- Treatment
- Two foliar applications of trifloxystrobine1
- Outcome
- controlling the diseasee0
- Direction
- as effective ase0
- Comparator
- standard metalaxyl-Cu treatmente0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“were as effective as the standard metalaxyl-Cu treatment in controlling the disease”
t0“grapevines”
e1“Two foliar applications of trifloxystrobin”
Claim · model-written summary
Prophylactic trifloxystrobin performed better than sterol inhibitor fungicides against field powdery mildew.
- Treatment
- Prophylactic applications of trifloxystrobin at 100150 mgL1e0
- Outcome
- control against powdery mildewe0
- Direction
- superiore0
- Comparator
- sterol inhibitor fungicidese0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Prophylactic applications of trifloxystrobin at 100–150 mgL–1 were superior in performance to sterol inhibitor fungicides and sulfur applications and provided the best control against powdery mildew under heavy infection pressure in field-grown grapevines”
Claim · model-written summary
Prophylactic trifloxystrobin performed better than sulfur against field powdery mildew.
- Treatment
- Prophylactic applications of trifloxystrobin at 100150 mgL1e0
- Outcome
- control against powdery mildewe0
- Direction
- superiore0
- Comparator
- sulfur applicationse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Prophylactic applications of trifloxystrobin at 100–150 mgL–1 were superior in performance to sterol inhibitor fungicides and sulfur applications and provided the best control against powdery mildew under heavy infection pressure in field-grown grapevines”
Claim · model-written summary
The authors recommend trifloxystrobin in mildew control and resistance avoidance programs.
- Outcome
- integration into control programs against powdery and downy mildew diseasese0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“well suited for integration into control programs against powdery and downy mildew diseases in vineyards, and as a component of resistance avoidance strategies”
t0“grapevines”
The same questions in other papers
trifloxystrobin · disease · VitisResults agree
3 papers in the same direction as this paper
- positive
- positive
- positive
application · disease · VitisPositive and negative results
49 papers in the same direction as this paper · 6 in the opposite direction
- positive
- negative
- negative
52 papers more in this group
See all 56 papers →Claims are grouped by organism, treatment and what was measured or targeted. A paper counts as positive when any of its claims in the group is positive.