Abstract
ABSTRACT The evolution of the reduction in Asian soybean rust (caused by Phakopsora pachyrhizi) control by site-specific fungicides has been reported season after season. In a field experiment, the effect of prothioconazole solo and added to multisite mancozeb was evaluated for rust control. Treatments were evaluated in a factorial design of four prothioconazole doses and three mancozeb doses. In a set of treatments, three applications were performed in one soybean cycle and four applications in another one. The first applications were performed at GS V8, 11 days before rust detection, with 2.56% leaflet incidence, while the other applications were at 12 to 14-day interval. Rust severity was quantified, control was calculated in relation to the unsprayed treatment, and soybean grain yield was estimated as kg/ha. Fifty-one to 61% control was obtained with three sprayings and 68% to 70% control with four sprayings of prothioconazole alone. Over 80% control was obtained with at least 0.3 L/ha prothioconazole + 2.0 kg/ha mancozeb, corresponding to 75 g a.i./ha prothioconazole + 1500 g a.i./ha mancozeb. Reduction in P. pachyrhizi control by the use of the site-specific fungicide alone was confirmed, while the addition of mancozeb can recover the efficacy of the site-specific fungicide.
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Claims 4
Claim · model-written summary
Three prothioconazole sprayings gave 51–61% rust control.
- Taxon
- soybean
Glycine maxt0e0e1
Not reportedInteractorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“soybean”
e0“Fifty-one to 61% control was obtained with three sprayings and 68% to 70% control with four sprayings of prothioconazole alone”
e1“control was calculated in relation to the unsprayed treatment”
Claim · model-written summary
Four prothioconazole sprayings gave 68–70% rust control.
- Taxon
- soybeanGlycine maxt0e0e1
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“soybean”
e0“Fifty-one to 61% control was obtained with three sprayings and 68% to 70% control with four sprayings of prothioconazole alone”
e1“control was calculated in relation to the unsprayed treatment”
Claim · model-written summary
At least 0.3 L/ha prothioconazole with 2.0 kg/ha mancozeb gave over 80% control.
- Taxon
- soybeanGlycine maxt0e0e1
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“soybean”
e0“Over 80% control was obtained with at least 0.3 L/ha prothioconazole + 2.0 kg/ha mancozeb”
e1“control was calculated in relation to the unsprayed treatment”
Claim · model-written summary
Adding mancozeb can restore prothioconazole efficacy against rust.
- Taxon
- soybeanGlycine maxt0e0e1
- Interactor
- Phakopsora pachyrhiziPhakopsora pachyrhizit0e0e1pathogen
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“soybean”
e0“the addition of mancozeb can recover the efficacy of the site-specific fungicide”
e1“Asian soybean rust (caused by Phakopsora pachyrhizi)”
The same questions in other papers
prothioconazole · control · Glycine max (soybean)Results agree
3 papers in the same direction as this paper
- positive
- positive
- positive
mancozeb · control · Glycine max (soybean)Results agree
3 papers in the same direction as this paper
- positive
- positive
- positive
application · control · Glycine max (soybean)Positive and negative results
8 papers in the same direction as this paper · 7 in the opposite direction · 2 reporting no difference from an alternative
- no effect
- no effect
- negative
14 papers more in this group
See all 18 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.