Abstract
The objective of this study was to evaluate the selectivity of cassava cultivar ‘Santa Helena’ and the efficiency of weed control using herbicides applied alone or tank mixed with and without sequential applications. Two experiments were carried out, both in a randomized block design with four replications. The treatments for the 1st experiment were: Hand hoeing (weed-free control); No hand hoeing (non-weeded control); sulfentrazone (500 g ha-1); sulfentrazone/[clomazone + clethodim] (500/[1125 + 120] g ha-1); sulfentrazone/mesotrione (500/240 g ha-1); S-metolachlor (1920 g ha-1); S-metolachlor/[clomazone + clethodim] (1920/[1125 + 120] g ha-1); S-metolachlor/mesotrione](1920/240 g ha-1); [sulfentrazone + S-metolachlor]/[clomazone + clethodim] ([500 + 1920]/[1125 + 120] g ha-1); [sulfentrazone + S-metolachlor]/mesotrione ([500 + 1920]/240 g ha-1). The treatments of the 2nd experiment were: Hand hoeing (weed-free control); No hand hoeing (non-weeded control); glyphosate (360 g ha-1) + hand hoeing; glyphosate + sulfentrazone (360 + 500 g ha-1); glyphosate + flumioxazin (360 + 50 g ha-1); glyphosate + clomazone (360 + 1125 g ha-1); glyphosate + S-metolachlor (360 + 1920 g ha-1); glyphosate + sulfentrazone + clomazone (360 + 400 + 900 g ha-1); glyphosate + sulfentrazone + S-metolachlor (360 + 400 + 1440 g ha-1); glyphosate + flumioxazin + clomazone (360 + 40 + 900 g ha-1); glyphosate + flumioxazin + S-metolachlor (360 + 40 + 1440 g ha-1). In the first experiment, only the treatments S-metolachlor, S-metolachlor/[clomazone + clethodim] and S-metolachlor/mesotrione did not present efficient weed control, causing reduction in yields; the other treatments were crop selective and efficient. In the second experiment, all treatments showed excellent levels of weed control up to 65 DAA and were crop selective. It is concluded that applications of tank mixtures, sequential mixtures and the use of glyphosate mixed with pre-emergent herbicides constitute excellent alternatives of weed management strategies in ‘Santa Helena’ cassava.
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Claims 6
Claim · model-written summary
S-metolachlor gave inefficient weed control and reduced cassava yield.
- Taxon
- cassava crop
Manihot esculentat0 - Material
- cultivar ‘Santa Helena’t0
- Treatment
- S-metolachlore0
- Interactor
- weede0weed
- Outcome
- weed controle0
- Direction
- did not present efficiente0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“In the first experiment, only the treatments S-metolachlor, S-metolachlor/[clomazone + clethodim] and S-metolachlor/mesotrione did not present efficient weed control, causing reduction in yields; the other treatments were crop selective and efficient.”
t0“cassava crop, cultivar ‘Santa Helena’”
Claim · model-written summary
S-metolachlor/[clomazone + clethodim] gave inefficient weed control and reduced cassava yield.
- Taxon
- cassava cropManihot esculentat0
- Material
- cultivar ‘Santa Helena’t0
- Treatment
- S-metolachlor/[clomazone + clethodim]e0
- Interactor
- weede0weed
- Outcome
- weed controle0
- Direction
- did not present efficiente0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“In the first experiment, only the treatments S-metolachlor, S-metolachlor/[clomazone + clethodim] and S-metolachlor/mesotrione did not present efficient weed control, causing reduction in yields; the other treatments were crop selective and efficient.”
t0“cassava crop, cultivar ‘Santa Helena’”
Claim · model-written summary
S-metolachlor/mesotrione gave inefficient weed control and reduced cassava yield.
- Taxon
- cassava cropManihot esculentat0
- Material
- cultivar ‘Santa Helena’t0
- Treatment
- S-metolachlor/mesotrionee0
- Interactor
- weede0weed
- Outcome
- weed controle0
- Direction
- did not present efficiente0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“In the first experiment, only the treatments S-metolachlor, S-metolachlor/[clomazone + clethodim] and S-metolachlor/mesotrione did not present efficient weed control, causing reduction in yields; the other treatments were crop selective and efficient.”
t0“cassava crop, cultivar ‘Santa Helena’”
Claim · model-written summary
Other first-experiment treatments were crop selective and efficient for weed control.
- Taxon
- cassava cropManihot esculentat0
- Material
- cultivar ‘Santa Helena’t0
- Interactor
- weede0weed
- Outcome
- crop selective and efficiente0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“In the first experiment, only the treatments S-metolachlor, S-metolachlor/[clomazone + clethodim] and S-metolachlor/mesotrione did not present efficient weed control, causing reduction in yields; the other treatments were crop selective and efficient.”
t0“cassava crop, cultivar ‘Santa Helena’”
Claim · model-written summary
All second-experiment treatments provided excellent weed control through 65 DAA and were crop selective.
- Taxon
- cassava cropManihot esculentat0
- Material
- cultivar ‘Santa Helena’t0
- Interactor
- weede0weed
- Outcome
- excellent levels of weed controle0
- Qualifier
- up to 65 DAAe0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“In the second experiment, all treatments showed excellent levels of weed control up to 65 DAA and were crop selective.”
t0“cassava crop, cultivar ‘Santa Helena’”
Claim · model-written summary
The authors recommended tank and sequential mixtures and glyphosate with pre-emergent herbicides for weed management.
- Taxon
- cassavaManihot esculentae0
- Material
- ‘Santa Helena’e0
- Interactor
- weede0weed
- Outcome
- weed management strategiese0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“It is concluded that applications of tank mixtures, sequential mixtures and the use of glyphosate mixed with pre-emergent herbicides constitute excellent alternatives of weed management strategies in ‘Santa Helena’ cassava.”
The same questions in other papers
clethodim · weed · Manihot esculenta (cassava)Positive and negative results
1 in the opposite direction
- positive
mesotrione · weed · Manihot esculenta (cassava)Positive and negative results
1 in the opposite direction
- positive
clomazone · weed · Manihot esculenta (cassava)Positive and negative results
3 in the opposite direction
- positive
- positive
- positive
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.