Selectivity of Saflufenacil for Sweet Sorghum and Potential use of Na-Bentazon as a Safener

Correia, Núbia Maria; Gomes, Leonardo José Petean

doi:10.1590/0100-83582015000200012

Cited by 7 publications

(8 citation statements)

References 14 publications

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“…Overall, these results indicate that blueberry cultivar response to saflufenacil differs, with Columbus (rabbiteye blueberry) displaying the greatest tolerance followed by O'Neal, Legacy, and New Hanover (southern highbush blueberry). Similarly, a cultivar difference to saflufenacil tolerance has been reported in several crops (Correia and Gomes 2015;Miller et al 2012). Observed differences in this study generally occurred at 200 and 400 g ha −1 , which are greater than the registered field rate (50 g ha −1 ) in fruit and nut tree production systems.…”

Section: Bearing Blueberrysupporting

confidence: 61%

Tolerance of southern highbush and rabbiteye blueberry cultivars to saflufenacil

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Jennings

Chaudhari³

et al. 2019

Weed Technol

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Greenhouse and field studies were conducted to determine tolerance of blueberry to saflufenacil. Greenhouse studies included five saflufenacil rates (0, 50, 100, 200, and 400 g ai ha−1) and three southern highbush blueberry cultivars (‘Legacy’, ‘New Hanover’, and ‘O’Neal’) and one rabbiteye blueberry cultivar (‘Columbus’). Saflufenacil treatments were soil applied into each pot when blueberry plants were approximately 30-cm tall. Visible injury (purpling/reddening of foliage and leaf abscission) ranged from 3% to 12%, 3% to 42%, 0% to 43%, and 0% to 29% with saflufenacil from 50 to 400 g ha−1 in Columbus, Legacy, New Hanover, and O’Neal, respectively, at 28 d after treatment. Regardless of injury, plant growth (change in height), soil plant analysis development, and whole-plant dry biomass of all cultivars did not differ among saflufenacil rates. Field studies were conducted in Burgaw, NC, to determine the tolerance of nonbearing (<3-yr-old and not mature enough to produce fruit) and bearing (>3-yr-old and mature enough to produce fruit) southern highbush blueberry (‘Duke’) to saflufenacil application at pre-budbreak or during the vegetative growth stage. Treatments included three rates of saflufenacil (50, 100, and 200 g ha−1), glyphosate (870 g ae ha−1), glufosinate (1096 g ai ha−1), glyphosate (870 g ha−1) + saflufenacil (50 g ha−1), glufosinate (1096 g ha−1) + saflufenacil (50 g ha−1), and hexazinone (1,120 g ai ha−1), applied POST-directed to the soil surface beneath blueberry plants in a 76-cm band on both sides of the blueberry planting row. The maximum injury from treatments containing saflufenacil was ≤11% in both nonbearing and bearing blueberry. No negative effects on plant growth or fruit yield were observed from any treatments. Results from both greenhouse and field studies suggest that saflufenacil applied at 50 (1X commercial use rate) and 100 g ha−1 is safe to use in blueberry.

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Section: Bearing Blueberrysupporting

confidence: 61%

Tolerance of southern highbush and rabbiteye blueberry cultivars to saflufenacil

Aldridge

Jennings

Chaudhari³

et al. 2019

Weed Technol

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“…Correia and Gomes (2015) also observed differentiated tolerance to saflufenacil herbicide among sweet sorghum hybrids. As for soluble solid content of the mixture, it was observed that treating seeds with naphthalic anhydride significantly increased this variable for the ESX5200 hybrid.…”

Section: Resultsmentioning

confidence: 70%

“…Some characteristics make sweet sorghum an excellent culture option, among which it is possible to highlight: short cycle, good yield with stalks rich in sugar, grains for animal feeding, tolerance to dry periods and possibility of being cultivated in all Southeastern Brazil (Teixeira et al,1997(Teixeira et al, , 1999. However, one of the obstacles to sweet sorghum production is weed management (May, 2011), due to the reduced number of herbicides registered for this culture (Correia and Gomes, 2015;AGROFIT, 2016). Normally, recommendations are only based on atrazine use both for Dicotyledons and some Monocotyledons weeds, applied during pre-or post-initial emergence.…”

Section: Introductionmentioning

confidence: 99%

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Selectivity of Herbicide Associations with Chemical Protector in the Treatment of Sweet Sorghum Hybrid Seeds

et al. 2017

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-Sweet sorghum culture is an alternative to sugar and ethanol production. With the aim of evaluating herbicide tank-mix selectivity associated or not to sweet sorghum seed treatment with naphthalic anhydride, two experiments with ESX5200 and EJX7C5110 hybrids were performed in red oxisol (clayey) field conditions, in the municipality of Campo Mourão, Paraná state. A randomized block design was used, with 4 x 2 factorial scheme, with four replications. The first factor represented three herbicide associations and a control sample without herbicide, and the second factor was constituted by the absence or presence of seed treatment with naphthalic anhydride (5.0 g kg -1 ). Herbicide treatments were tank-mixes of atrazine + S-metolachor (2,640 + 480 g ha 1 ) (pre-emergence); atrazine + S-metolachlor + isoxaflutole (2,640 + 480 + 11.25 g ha -1 ) (pre-emergence) and atrazine + S-metolachlor (1,500 + 384 g ha -1 ) (post-emergence). The following characteristics were evaluated: intoxication, plant height, stalk diameter, number of internodes per stalk and plant density, performed 60 days after emergence (DAE); stalk yield and Brix, were evaluated on day 85 DAE. Atrazine + S-metolachlor tank-mix applied in pre or post-emergence did not affect growth, development, yield and stalk quality of the ESX5200 and EJX7C5110 sweet sorghum hybrids. Sweet sorghum seed treatment with naphthalic anhydride provided partial protection against the action of atrazine + s-metolachlor + isoxaflutole tank-mixes, being more evident for the ESX5200 hybrid. Keywords

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“…In the early development stages, sorghum plants are relatively small, fragile and has slow growth (Silva et al, 2014). Competition with weed at this stage is quite critical, and if control measures are not taken in the first few weeks after the emergence of sorghum plants, grain yield can be reduced by around 35-70% (Rodrigues et al, 2010) The chemical control of weeds in the crop is limited by the low amount of registered herbicides, being only atrazine, simazine and 2,4-D (Correia and Gomes, 2015;AGROFIT, 2018). Studies on the effects and efficacy of herbicides on sorghum are fundamental to increase alternatives for weed control (Machado et al, 2016).…”

Section: Introductionmentioning

confidence: 99%

Selectivity and Effectiveness of Herbicides in the Grain Sorghum Crop

et al. 2019

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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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Selectivity of Saflufenacil for Sweet Sorghum and Potential use of Na-Bentazon as a Safener

Cited by 7 publications

References 14 publications

Tolerance of southern highbush and rabbiteye blueberry cultivars to saflufenacil

Tolerance of southern highbush and rabbiteye blueberry cultivars to saflufenacil

Selectivity of Herbicide Associations with Chemical Protector in the Treatment of Sweet Sorghum Hybrid Seeds

Selectivity and Effectiveness of Herbicides in the Grain Sorghum Crop

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