Abstract
The objective of this research was to evaluate weed control in a successional soybean-sorghum system by using preemergent herbicides. Two trials were conducted in soybean and two in sorghum, in different soil types (sandy in Rio Verde city and clayey in Montividiu city). All trials were established in a completely randomized block design with five preemergent herbicides in soybean (rates in): diclosulam 35.3 g a.i.ha -1 , chlorimuron 20 g a.i.ha -1 , sulfentrazone 200 g a.i.ha -1 , flumioxazin 50 g a.i.ha -1 , S-metolachlor 1728 g a.i.ha -1 , and two controls (hand weeded and untreated). Treatments in sorghum trials were the same to the soybean plus atrazine 1250 g a.i.ha -1 and atrazine 1250 g a.i.ha -1 + S-metolachlor 1728 g a.i.ha -1 . All treatments had four replicates. Weed control was assessed at 7, 14, 21 and 28 days after planting (DAP) in both crops. In addition, yield was measured when grains reached physiological maturity. All preemergent herbicide treatments successfully controlled weeds, specially Commelina benghalensis, Cenchrus echinatus and Eleusine indica, in both soybean trials until 28 DAP. In some weeds of sorghum, sulfentrazone, diclosulam and chlorimuron sprayed at soybean preemergence performed better than atrazine sprayed at sorghum preemergence. All preemergent herbicides sprayed at soybean preemergence did not affect soybean and sorghum yield, showing similarity with the hand weeded treatment. The results of this research provide evidence that the mix of crop succession and preemergent herbicide applications can be a strong strategy for integrated weed management.
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Claims 8
Claim · model-written summary
Preemergent herbicides controlled Commelina benghalensis in soybean trials through 28 DAP.
- Taxon
- soybean
Glycine maxe0 - Treatment
- preemergent herbicide treatmentse0
- Interactor
- Commelina benghalensis
Commelina benghalensise0weed - Outcome
- controlled weedse0
- Direction
- controllede0
- Qualifier
- until 28 DAPe0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“All preemergent herbicide treatments successfully controlled weeds, specially Commelina benghalensis, Cenchrus echinatus and Eleusine indica, in both soybean trials until 28 DAP.”
Claim · model-written summary
Preemergent herbicides controlled Cenchrus echinatus in soybean trials through 28 DAP.
- Taxon
- soybeanGlycine maxe0
- Treatment
- preemergent herbicide treatmentse0
- Interactor
- Cenchrus echinatus
Cenchrus echinatuse0weed - Outcome
- controlled weedse0
- Direction
- controllede0
- Qualifier
- until 28 DAPe0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“All preemergent herbicide treatments successfully controlled weeds, specially Commelina benghalensis, Cenchrus echinatus and Eleusine indica, in both soybean trials until 28 DAP.”
Claim · model-written summary
Preemergent herbicides controlled Eleusine indica in soybean trials through 28 DAP.
- Taxon
- soybeanGlycine maxe0
- Treatment
- preemergent herbicide treatmentse0
- Interactor
- Eleusine indica
Eleusine indicae0weed - Outcome
- controlled weedse0
- Direction
- controllede0
- Qualifier
- until 28 DAPe0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“All preemergent herbicide treatments successfully controlled weeds, specially Commelina benghalensis, Cenchrus echinatus and Eleusine indica, in both soybean trials until 28 DAP.”
Claim · model-written summary
Sulfentrazone sprayed at soybean preemergence controlled some sorghum weeds better than atrazine sprayed at sorghum preemergence.
SorghumNot reportedInteractorInteractor role
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“In some weeds of sorghum, sulfentrazone, diclosulam and chlorimuron sprayed at soybean preemergence performed better than atrazine sprayed at sorghum preemergence.”
Claim · model-written summary
Diclosulam sprayed at soybean preemergence performed better than atrazine for some sorghum weeds.
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“In some weeds of sorghum, sulfentrazone, diclosulam and chlorimuron sprayed at soybean preemergence performed better than atrazine sprayed at sorghum preemergence.”
Claim · model-written summary
Chlorimuron sprayed at soybean preemergence performed better than atrazine for some sorghum weeds.
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“In some weeds of sorghum, sulfentrazone, diclosulam and chlorimuron sprayed at soybean preemergence performed better than atrazine sprayed at sorghum preemergence.”
Claim · model-written summary
Soybean preemergent herbicides did not affect soybean yield relative to hand weeding.
- Taxon
- soybeanGlycine maxe0
- Treatment
- preemergent herbicides sprayed at soybean preemergencee0
- Outcome
- yielde0
- Direction
- did not affecte0
- Comparator
- hand weeded treatmente0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“All preemergent herbicides sprayed at soybean preemergence did not affect soybean and sorghum yield, showing similarity with the hand weeded treatment.”
Claim · model-written summary
Soybean preemergent herbicides did not affect sorghum yield relative to hand weeding.
- Treatment
- preemergent herbicides sprayed at soybean preemergencee0
- Outcome
- sorghum yielde0
- Direction
- did not affecte0
- Comparator
- hand weeded treatmente0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“All preemergent herbicides sprayed at soybean preemergence did not affect soybean and sorghum yield, showing similarity with the hand weeded treatment.”
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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.