Growth Stage Influences Mesotrione Efficacy and Fate in Two Bluegrass (<i>Poa</i>) Species

Yu, Jialin; McCullough, Patrick E.

doi:10.1614/wt-d-15-00153.1

Cited by 15 publications

(16 citation statements)

References 24 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…These weed species are commonly found in various cool-season turfgrasses. Herbicides, such as 2,4-D, dicamba, MCPP, triclopyr, and sulfentrazone are broadcast-applied in cool-season turfgrasses for POST control of various broadleaf weeds (McElroy and Martins, 2013; Reed et al, 2013; Johnston et al, 2016; Yu and McCullough, 2016a; Yu and McCullough, 2016b). Precision herbicide application using machine-vision based sprayers will substantially reduce herbicide input and weed control costs.…”

Section: Introductionmentioning

confidence: 99%

Weed Detection in Perennial Ryegrass With Deep Learning Convolutional Neural Network

et al. 2019

Self Cite

View full text Add to dashboard Cite

Precision herbicide application can substantially reduce herbicide input and weed control cost in turfgrass management systems. Intelligent spot-spraying system predominantly relies on machine vision-based detectors for autonomous weed control. In this work, several deep convolutional neural networks (DCNN) were constructed for detection of dandelion (Taraxacum officinale Web.), ground ivy (Glechoma hederacea L.), and spotted spurge (Euphorbia maculata L.) growing in perennial ryegrass. When the networks were trained using a dataset containing a total of 15,486 negative (images contained perennial ryegrass with no target weeds) and 17,600 positive images (images contained target weeds), VGGNet achieved high F1 scores (≥0.9278), with high recall values (≥0.9952) for detection of E. maculata, G. hederacea, and T. officinale growing in perennial ryegrass. The F1 scores of AlexNet ranged from 0.8437 to 0.9418 and were generally lower than VGGNet at detecting E. maculata, G. hederacea, and T. officinale. GoogleNet is not an effective DCNN at detecting these weed species mainly due to the low precision values. DetectNet is an effective DCNN and achieved high F1 scores (≥0.9843) in the testing datasets for detection of T. officinale growing in perennial ryegrass. Moreover, VGGNet had the highest Matthews correlation coefficient (MCC) values, while GoogleNet had the lowest MCC values. Overall, the approach of training DCNN, particularly VGGNet and DetectNet, presents a clear path toward developing a machine vision-based decision system in smart sprayers for precision weed control in perennial ryegrass.

show abstract

Section: Introductionmentioning

confidence: 99%

Weed Detection in Perennial Ryegrass With Deep Learning Convolutional Neural Network

et al. 2019

Self Cite

View full text Add to dashboard Cite

show abstract

“…Similarly, the tolerance of cotton ( Gossypium hirsutum L.) and peanut ( Arachis hypogaea L.) to flumioxazin applications has shown to increase at mature growth stage as compared with immature growth stages (Price et al 2004a; Thomas et al 2005). Researchers have also shown that growth stage influences control of grassy weeds from other herbicides, including glufosinate, glyphosate, quinclorac, and mesotrione (Ahmadi et al 1980; Chism et al 1992; Steckel et al 1997; Yu and McCullough 2016). Thus, tolerance to PPO inhibitors at recommended application rates may become prevalent after R-biotypes reach mature growth stages.…”

Section: Resultsmentioning

confidence: 99%

Annual Bluegrass (Poa annua) Biotypes Exhibit Differential Levels of Susceptibility and Biochemical Responses to Protoporphyrinogen Oxidase Inhibitors

McCullough

Czarnota

2018

Weed Sci

Self Cite

View full text Add to dashboard Cite

An annual bluegrass (Poa annuaL.) biotype with limited susceptibility to POST flumioxazin applications was identified in Georgia. The objectives of this research were to quantify tolerance levels of this biotype (R-biotype) to protoporphyrinogen oxidase (PPO) inhibitors and characterize physiological responses to flumioxazin. In dose–response experiments on 3- to 5-tiller plants, flumioxazin and sulfentrazone rates required to reduce dry-shoot biomass 50% from the nontreated were >14.5 and 10.4 times greater for the R-biotype, as compared with a susceptible (S)-biotype, respectively. Establishment of the R-biotype from seed was completely controlled by PRE applications of flumioxazin and oxadiazon, similar to the S-biotype. Tank mixtures of chlorpyrifos with flumioxazin did not enhance biomass reductions of the R-biotype, suggesting that tolerance levels may not be related to cytochrome P450–associated metabolism. In laboratory experiments, the R-biotype averaged 27% less electrolyte leakage, as compared with the S-biotype, after flumioxazin treatments. Lipid peroxidation in the R-biotype, as measured by malondialdehyde levels, averaged 25% less than the S-biotype at 72 h after broadcast flumioxazin treatments at 280 and 560 g ha−1. The tolerance to POST applications of PPO inhibitors in thisP. annuabiotype is associated with less lipid peroxidation and electrolyte leakage as compared with the S-biotype. These biochemical differences in biotypes may contribute to erratic levels of POST control from flumioxazin and could contribute to PPO-inhibitor resistance.

show abstract

“…Elmore et al (2013) noted that topramezone at 0.54 kg ha −1 controlled annual bluegrass <5% at 14 and 21 d after treatment. Mesotrione has potential to control annual bluegrass during Kentucky bluegrass establishment from seed, but applications to tillered plants have erratic efficacy for postemergence control (Hart and McCullough, 2007; Yu and McCullough, 2016).…”

Section: Resultsmentioning

confidence: 99%

Annual Bluegrass Control during Hybrid Bluegrass Establishment from Sprigs

McCullough

2017

Intl Turfgrass Soc Res J

Self Cite

View full text Add to dashboard Cite

Hybrid bluegrass (Poa arachnifera Torr. × P. pratensis L.) establishment may be compromised by the emergence of annual bluegrass (P. annua L.) in the fall. The objective of this research was to evaluate the efficacy of herbicides for annual bluegrass control during the establishment of ‘DALBG 1201’ hybrid bluegrass from sprigs. Herbicides were applied at two timings: 5 d after planting (DAP) or 3 wk after planting (WAP). Hybrid bluegrass cover was rated four times between 9 and 35 WAP. The first and second visual ratings of annual bluegrass cover were made between 16 and 18 and at 30 WAP, respectively. At 26 WAP, hybrid bluegrass cover was approximately two‐fold in plots treated with mesotrione, oxadiazon, or topramezone compared with the nontreated. Primisulfuron applied singly or sequentially at 0.04 kg ha−1 controlled annual bluegrass ≥88% but reduced hybrid bluegrass cover >30% relative to the nontreated. Ethofumesate applied at 0.84 kg ha−1 at 3 WAP controlled annual bluegrass 74%. Oxadiazon at 1.12 or 2.24 kg ha−1 applied 5 DAP controlled annual bluegrass 67 to 75% at 30 WAP without reducing hybrid bluegrass cover. All other treatments provided poor (<70%) control of annual bluegrass. Overall, hybrid bluegrass was tolerant to ethofumesate, oxadiazon, mesotrione, and topramezone at rates evaluated during establishment from sprigs. Programs that included ethofumesate at 0.84 kg a.i. ha−1 or oxadiazon at 1.12 or 2.24 kg ha−1 provided best annual bluegrass control and improved hybrid bluegrass cover from the nontreated.

show abstract

Growth Stage Influences Mesotrione Efficacy and Fate in Two Bluegrass (Poa) Species

Cited by 15 publications

References 24 publications

Weed Detection in Perennial Ryegrass With Deep Learning Convolutional Neural Network

Weed Detection in Perennial Ryegrass With Deep Learning Convolutional Neural Network

Annual Bluegrass (Poa annua) Biotypes Exhibit Differential Levels of Susceptibility and Biochemical Responses to Protoporphyrinogen Oxidase Inhibitors

Annual Bluegrass Control during Hybrid Bluegrass Establishment from Sprigs

Contact Info

Product

Resources

About