Simulated drift of dicamba and 2,4-D on soybeans: effects of application dose and time

Costa, Estevam Matheus; Jakelaitis, Adriano; Zuchi, Jacson; Pereira, Leandro Spíndola; Ventura, Matheus Vinicius Abadia; Oliveira, Gustavo Silva; Sousa, Gustavo Dorneles de; Silva, Jeovane Nascimento

doi:10.14393/bj-v36n3a2020-47742

Cited by 11 publications

(7 citation statements)

References 12 publications

(34 reference statements)

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“…This canopy closure delay with increase in 2,4-D micro-rate could be attributed to plant height reduction associated with stunted growth (data not shown). Previous studies have shown a delay in canopy closure as a result of stunted growth (Costa et al, 2020). Cuvaca et al (2021) reported a delay in dicamba-tolerant soybean canopy closure with increase in 2,4-D micro-rate.…”

Section: Number Of Days To Canopy Closurementioning

confidence: 97%

Growth and Yield Losses of Roundup Ready Soybean as Influenced by Micro-rates of 2,4-D

Cuvaca¹,

Knežević²,

Scott³

et al. 2021

SAR

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Widespread resistance to glyphosate has made weed control very challenging. In response, new approaches to managing resistant biotypes such as the Enlist E3TM have been developed. This technology allows in-crop use of 2,4-D but there is fear associated with unintentional application of the herbicide (e.g. direct application, tank contamination, or spray drift) to sensitive crops. A study was conducted to evaluate Roundup Ready (RR) soybean growth and yield loss as influenced by 2,4-D [six micro rates of 1/5, 1/10, 1/50, 1/100, 1/500 and 1/1000 of the 1,120 g ae ha-1 label recommended dose, and a check with no herbicide applied] applied at V2, R1 and R2 growth stages. In general, RR soybean was more sensitive to 2,4-D at R1 than V2 and R2. The highest 2,4-D rate, 1/5 of the label recommended rate, caused 51% soybean injury symptom, 13 d canopy closure delay, 41.2% plant height reduction, and 68.9% yield loss at R1. Based on effective dose (ED) estimates, 37.7 g ae ha-1 2,4-D caused 5% yield loss (0.23 Mg ha-1) at R1 compared with a 2.5- and 2.0-fold higher dose at V2 and R2, respectively. With respect to number of days to canopy closure, both reproductive stages (R1 and R2) were equally less sensitive to 2,4-D than the vegetative one (V2) as the plants had already achieved maximum growth recorded. On the other hand, ED estimates for plant height have shown that both V2 and R2 were equally more sensitive to 2,4-D than R1. These results clearly indicated that RR soybean growth and yield loss were significantly influenced by the timing of exposure and amount of 2,4-D.

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Section: Number Of Days To Canopy Closurementioning

confidence: 97%

Growth and Yield Losses of Roundup Ready Soybean as Influenced by Micro-rates of 2,4-D

Cuvaca¹,

Knežević²,

Scott³

et al. 2021

SAR

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“…For 2017, Iowa concluded that 67% of its alleged damage complaints involved OTT dicamba products (U.S. EPA, 2018a). In addition, field trials and results of university research on dicamba drift were available to estimate losses (Costa et al, 2020; Robinson et al, 2013). Data released in 2020 on a 2018 Agricultural Resource Management Survey suggested that between 4.1 and 15.6 million acres of soybeans had visual injury related to dicamba applications (Chism et al, 2020).…”

Section: Registration Requirementsmentioning

confidence: 99%

“…For 2018, similar calculations predict losses of $11.3–$55 million. Other research has documented soybean yield losses and has suggested that yield damages can be significant (Costa et al, 2020; Jones, Norsworthy, & Barber, 2019a).…”

Section: Registration Requirementsmentioning

confidence: 99%

Creating a compensation program for injuries from dicamba spray drift and volatilization

Centner

2021

Applied Eco Perspectives Pol

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Over‐the‐top dicamba herbicides used on soybean and cotton crops are causing offsite injuries to vegetation of thousands of nearby property owners who are not being compensated for their damages. An examination of the use of dicamba products shows disagreement between facilitating profitable agricultural production and the imposition of damages on nearby property owners. To safeguard private property rights, a compensation program is proposed. By placing a fee on the sale of dicamba products, funds could be made available to provide compensation to persons whose properties are injured by drift and volatilization.

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“…crops exposed to the off-target drift of 2,4-D or dicamba. Some other examples of the crops that experience damage and visual injury due to drift rates (often very low rates compared to the label rates) of auxinic herbicides include cotton (Gossypium hirsutum L.) [6,7], soybean (Glycine max L.) [8,9], tomato (Solanum lycopersicum L.) [10,11], grape (Vitis vinifera L.) [12], and sweet cherry (Prunus avium L.) [13].…”

Section: Introductionmentioning

confidence: 99%

The Response of Iranian Melon (Cucumis melo L.) Accessions to 2,4-D Drift

Zangoueinejad

Sirooeinejad

Bajwa

2021

Plants

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One of the most widely used auxinic herbicides in southern Iran’s cereal crop fields is 2,4-D; however, the concurrent growing season of off-season melons in this region potentially leads to herbicide drift from cereal fields to the melon fields. To study the response of some Iranian wild melon accessions to three simulated drift rates of 2,4-D, including 112.1, 11.2, and 3.7 g ae ha−1, a field experiment was conducted during 2019 and 2020 growing seasons. It was found that by increasing the herbicide rate from 3.7 to 112.1 g ae ha−1, the level of visual injury increased in all accessions. However, significant variation in herbicide tolerance was observed among different melon accessions. The MEL-R1 was the most tolerant accession with only 20% injury, while MEL-D8 displayed very high injury rate (ca. 90%) as assessed at 6 weeks after treatment during 2019. The accession MEL-S3 was the most tolerant to 2,4-D drift rates (20% injury) at 6 weeks after treatment during 2020. There was no significant difference between the accessions MEL-R1 and MEL-S3 in terms of their response to 2,4-D treatment during both years of the study, as these accessions fully recovered from injury over 6 weeks after herbicide treatment. In addition, only these two accessions were able to produce yield after the application of 2,4-D at the highest rate tested (112.1 g ae ha−1). Therefore, the melon accessions MEL-R1 and MEL-S3 could be recommended for cultivation and even for breeding programs in order to develop 2,4-D-tolerant commercial cultivars in regions where this herbicide is commonly used in cereal crop production adjacent to the melon fields.

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Simulated drift of dicamba and 2,4-D on soybeans: effects of application dose and time

Cited by 11 publications

References 12 publications

Growth and Yield Losses of Roundup Ready Soybean as Influenced by Micro-rates of 2,4-D

Growth and Yield Losses of Roundup Ready Soybean as Influenced by Micro-rates of 2,4-D

Creating a compensation program for injuries from dicamba spray drift and volatilization

The Response of Iranian Melon (Cucumis melo L.) Accessions to 2,4-D Drift

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