Abstract
ABSTRACT: Over the years, cultivated areas of sorghum have expanded considerably in Brazil. Chemical weed control has become an obstacle due to the scarcity of herbicides registered for the crop. The aim of this study was to evaluate the efficiency of weed control and selectivity of herbicides applied in pre and post emergence in the crop. Two experiments were conducted. In one of them, the hybrid BRS 310 was used while DKB 550 was used in the other. The experiments were performed in the field in randomized block design, evaluating seven treatments with four replications. The used treatments were: 1. Hand weeding, 2. S-metolachlor (1,440 g a.i. ha-1), 3. S-metolachlor (1,440 g a.i. ha-1) + atrazine (2,000 g a.i. ha-1), 4. atrazine (2,000 g a.i. ha-1), 5. atrazine (3,000 g a.i. ha-1), 6. atrazine (2,000 g a.i. ha-1) + mineral oil (0.25%), and 7. atrazine (2,000 g a.i. ha-1) + mineral oil (0.5%). It was verified that post-emergence atrazine was efficient in the weed control and selective to the sorghum crop, not affecting productivity, except in mixture with mineral oil (0.5%). S-metolachlor cannot be recommended in pre-emergence for the tested cultivars because it is not selective, reducing plants and productivity.
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Claims 6
Claim · model-written summary
Post-emergence atrazine efficiently controlled weeds.
SorghumNot reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“post-emergence atrazine was efficient in the weed control and selective to the sorghum crop”
t0“Grain Sorghum Crop”
Claim · model-written summary
Post-emergence atrazine was selective to sorghum and did not affect productivity except with 0.5% mineral oil.
- Treatment
- post-emergence atrazinee0
- Outcome
- productivitye0
- Direction
- not affectinge0
- Qualifier
- except in mixture with mineral oil (0.5%)e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“post-emergence atrazine was efficient in the weed control and selective to the sorghum crop, not affecting productivity, except in mixture with mineral oil (0.5%).”
Claim · model-written summary
Atrazine mixed with 0.5% mineral oil was an exception to preserved sorghum productivity.
- Treatment
- mixture with mineral oil (0.5%)e0
- Outcome
- productivitye0
- Qualifier
- except in mixture with mineral oil (0.5%)e0
- Comparator
- post-emergence atrazinee1
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“not affecting productivity, except in mixture with mineral oil (0.5%).”
e1“post-emergence atrazine was efficient in the weed control and selective to the sorghum crop”
Claim · model-written summary
Pre-emergence S-metolachlor reduced sorghum plant numbers.
- Treatment
- S-metolachlore0
- Outcome
- plantse0
- Direction
- reducinge0
- Qualifier
- in pre-emergence for the tested cultivarse0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“S-metolachlor cannot be recommended in pre-emergence for the tested cultivars because it is not selective, reducing plants and productivity.”
t0“Grain Sorghum Crop”
Claim · model-written summary
Pre-emergence S-metolachlor reduced sorghum productivity.
- Treatment
- S-metolachlore0
- Outcome
- productivitye0
- Direction
- reducinge0
- Qualifier
- in pre-emergence for the tested cultivarse0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“S-metolachlor cannot be recommended in pre-emergence for the tested cultivars because it is not selective, reducing plants and productivity.”
t0“Grain Sorghum Crop”
Claim · model-written summary
The authors advise against pre-emergence S-metolachlor for the tested sorghum cultivars.
- Outcome
- S-metolachlor cannot be recommended in pre-emergence for the tested cultivarse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“S-metolachlor cannot be recommended in pre-emergence for the tested cultivars because it is not selective, reducing plants and productivity.”
t0“Grain Sorghum Crop”
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