Abstract
Downy mildew (Bremia lactucae) is an economically important disease of lettuce in New Zealand. At present, few chemicals are registered in this country for control of this disease. The aim of this experiment was to evaluate the efficacy of 0 chemicals for control of downy mildew of lettuce. The experiment was laid out in a randomised block design with four replicates. An Oxford precision sprayer, calibrated to 500 litres/ha, was used to apply the chemicals. Disease assessments were carried out weekly. On 25 October 2006, 20 plants in the center two rows of each plot were harvested and assessed for downy mildew. Non-sprayed plants had 24.5% basal area infected. All ten fungicides tested reduced downy mildew. Fosetyl-aluminium had significantly (P<0.05) lower levels of downy mildew (2.0% basal area affected) than the other fungicides. Metalaxyl plus mancozeb and azoxystrobin gave good control of downy mildew (with 2.8% and 3.9% basal area affected respectively). Copper hydroxide and mancozeb gave poorest control of the disease (7.4% and 6.8% basal area affected respectively). Based on the results of this experiment, fosetyl-aluminium, metalaxyl plus mancozeb, and azoxystrobin show promise for control of lettuce downy mildew in New Zealand.
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Claims 8
Claim · model-written summary
Non-sprayed lettuce plants had 24.5% basal area infected by downy mildew
- Taxon
- lettuce
Lactuca sativae1 - Interactor
- Bremia lactucae
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Bremia lactucaee1pathogen - Outcome
- basal area infectede2
- Value
- 24.5%e2
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
.jpg?width=500)
Verbatim
e1“Downy mildew (Bremia lactucae) is an economically important disease of lettuce in New Zealand”
e2“Non-sprayed plants had 24.5% basal area infected”
Claim · model-written summary
All ten fungicides reduced downy mildew on lettuce compared with non-sprayed plants
- Taxon
- lettuceLactuca sativae1
- Treatment
- All ten fungicidese3
- Interactor
- Bremia lactucaeBremia lactucaee1pathogen
- Outcome
- downy mildewe3
- Direction
- reducede3
- Comparator
- Non-sprayed plantse2
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“Downy mildew (Bremia lactucae) is an economically important disease of lettuce in New Zealand”
e2“Non-sprayed plants had 24.5% basal area infected”
e3“All ten fungicides tested reduced downy mildew”
Claim · model-written summary
Fosetyl-aluminium gave lower downy mildew levels on lettuce than the other fungicides
- Taxon
- lettuceLactuca sativae1
- Treatment
- Fosetyl-aluminiume4
- Interactor
- Bremia lactucaeBremia lactucaee1pathogen
- Outcome
- levels of downy mildewe4
- Direction
- lowere4
- Value
- 2.0% basal area affectede4
- Comparator
- the other fungicidese4
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“Downy mildew (Bremia lactucae) is an economically important disease of lettuce in New Zealand”
e4“Fosetyl-aluminium had significantly (P<0.05) lower levels of downy mildew (2.0% basal area affected) than the other fungicides”
Claim · model-written summary
Metalaxyl plus mancozeb gave good control of lettuce downy mildew with 2.8% basal area affected
- Taxon
- lettuceLactuca sativae1
- Treatment
- Metalaxyl plus mancozebe5
- Interactor
- Bremia lactucaeBremia lactucaee1pathogen
- Outcome
- control of downy mildewe5
- Direction
- decreaseinferrede5
- Value
- 2.8%e5
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“Downy mildew (Bremia lactucae) is an economically important disease of lettuce in New Zealand”
e5“Metalaxyl plus mancozeb and azoxystrobin gave good control of downy mildew (with 2.8% and 3.9% basal area affected respectively)”
Claim · model-written summary
Azoxystrobin gave good control of lettuce downy mildew with 3.9% basal area affected
- Taxon
- lettuceLactuca sativae1
- Treatment
- azoxystrobine5
- Interactor
- Bremia lactucaeBremia lactucaee1pathogen
- Outcome
- control of downy mildewe5
- Direction
- decreaseinferrede5
- Value
- 3.9%e5
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“Downy mildew (Bremia lactucae) is an economically important disease of lettuce in New Zealand”
e5“Metalaxyl plus mancozeb and azoxystrobin gave good control of downy mildew (with 2.8% and 3.9% basal area affected respectively)”
Claim · model-written summary
Copper hydroxide gave the poorest control of lettuce downy mildew, with 7.4% basal area affected
- Taxon
- lettuceLactuca sativae1
- Treatment
- Copper hydroxidee6
- Outcome
- control of the diseasee6
- Direction
- higherinferrede6
- Value
- 7.4%e6
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“Downy mildew (Bremia lactucae) is an economically important disease of lettuce in New Zealand”
e6“Copper hydroxide and mancozeb gave poorest control of the disease (7.4% and 6.8% basal area affected respectively)”
Claim · model-written summary
Mancozeb gave the poorest control of lettuce downy mildew, with 6.8% basal area affected
- Taxon
- lettuceLactuca sativae1
- Treatment
- mancozebe6
- Outcome
- control of the diseasee6
- Direction
- higherinferrede6
- Value
- 6.8%e6
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“Downy mildew (Bremia lactucae) is an economically important disease of lettuce in New Zealand”
e6“Copper hydroxide and mancozeb gave poorest control of the disease (7.4% and 6.8% basal area affected respectively)”
Claim · model-written summary
Fosetyl-aluminium, metalaxyl plus mancozeb and azoxystrobin are promising for controlling lettuce downy mildew in New Zealand
- Taxon
- lettuceLactuca sativae7
- Outcome
- control of lettuce downy mildewe7
- Qualifier
- fosetyl-aluminium, metalaxyl plus mancozeb, and azoxystrobine7
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e7“fosetyl-aluminium, metalaxyl plus mancozeb, and azoxystrobin show promise for control of lettuce downy mildew in New Zealand”
The same questions in other papers
metalaxyl · Bremia lactucae · Lactuca sativa (garden lettuce)Positive and negative results
1 paper in the same direction as this paper · 1 in the opposite direction
- negative
- positive
fungicide · Bremia lactucae · Lactuca sativa (garden lettuce)Positive and negative results
4 papers in the same direction as this paper · 1 in the opposite direction
- negative
- positive
- positive
2 papers more in this group
See all 6 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.