Slow-Release Delivery System for Herbicides in Container-Grown Stock

Gorski, S. F.

doi:10.1017/s0890037x00037957

Cited by 11 publications

(8 citation statements)

References 14 publications

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“…In the past few decades, many methods of controlling herbicide loss have been developed such as microcapsule, tablet, , organosilicone, , nanoadditive, − and so on. Although these methods can reduce herbicide loss and improve UE in different degrees, they have some disadvantages limiting their applications.…”

Section: Introductionmentioning

confidence: 99%

“…Although these methods can reduce herbicide loss and improve UE in different degrees, they have some disadvantages limiting their applications. Therein, the microcapsule and tablet methods mainly focus on the slow release of pesticides through the coating of polymers; however, the defects of complex procedure and high cost obviously hinder their application. , Besides, the lack of sensitivity to physical and chemical factors makes it difficult for microcapsules and tablets to control the release of herbicides . Organosilicone can increase the adhesion and penetration performance of herbicides to a certain extent, while this method has poor stability, high cost, and low ability to control herbicide release .…”

Section: Introductionmentioning

confidence: 99%

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Fabrication of a Temperature-Controlled-Release Herbicide Using a Nanocomposite

Zhang²,

Xiang

et al. 2017

ACS Sustainable Chem. Eng.

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In this work, temperature-responsive controlled-release herbicide particles (TCHP) with a core−shell structure were developed using a nanocomposite consisting of attapulgite (ATP), NH 4 HCO 3 , amino silicon oil (ASO), poly(vinyl alcohol) (PVA), and glyphosate (Gly). Therein, the ATP-NH 4 HCO 3 -Gly mixture acts as the core, and ASO-PVA acts as the shell. ATP possesses a porous micro/nano networks structure and thus can bind a large amount of Gly molecules. NH 4 HCO 3 , as a foaming agent, can produce CO 2 and NH 3 bubbles to make plenty of micro/nano pores in the ASO-PVA shell, which facilitates the release of Gly. The pore amount can be efficiently adjusted by temperature, meanwhile the PVA shell tends to dissolve in aqueous solution at a high temperature, so that the release of Gly can be easily controlled. Importantly, this technology could effectively decrease the loss of Gly under simulated rainfall and thus improve the control efficiency on weeds. The hydrophobic ASO endows TCHP a high stability in aqueous solution for at least three months. This work provides a promising approach to control the release and loss of pesticide, which has a potential application to enhance the utilization efficiency and thus lower the environmental pollution.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Fabrication of a Temperature-Controlled-Release Herbicide Using a Nanocomposite

Zhang²,

Xiang

et al. 2017

ACS Sustainable Chem. Eng.

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“…Herbicide that falls outside of the containers can leach or move off site with runoff water (Riley et al 1994). In many cases, uniform application of herbicides to the soil of containerized plants may not be possible because plant canopies irregularly cover the containers (Gorski 1993).…”

Section: Introductionmentioning

confidence: 99%

“…Commercial herbicide formulations that rapidly release their active ingredient into the environment can result in poor long-term weed control (Gorski 1993). Excessive moisture after the application of preemergence herbicides can leach the herbicide into the crop root zone causing injury (Monaco et al 2002).…”

Section: Introductionmentioning

confidence: 99%

Leaf-Waste Pellets as a Herbicide Carrier for Container-Grown Ornamental Plants

2006

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An organic herbicide carrier could help reduce misapplication and environmental pollution associated with spray application of herbicides. Pellets prepared from landscape leaves that were dried, ground, and pelletized were evaluated as a preemergence herbicide carrier for container-grown ornamental plants. Isoxaben, pendimethalin, and prodiamine at rates of 1.12, 2.25, and 2.25 kg ai/ha, respectively, with either water or landscape leaf-waste pellets as a carrier were applied to chrysanthemum ‘Lisa’, spirea ‘Neon Flash’, and wintercreeper ‘Coloratus’. Common groundsel, common purslane, and giant foxtail were seeded following herbicide application. Leaf-waste pellets as a carrier produced equivalent efficacy and phytotoxicity ratings to conventional spray application of pendimethalin and prodiamine on both chrysanthemum and wintercreeper. The leaf-waste pellets were not an effective carrier for the application of isoxaben alone. The pellets had inconsistent effects on spirea phytotoxicity and growth.

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“…As much as 80% of broadcast herbicide may settle into spaces between containers (Gilliam et al, 1992) and leach or move offsite with runoff water. In many cases, uniform application of herbicides to the soil of containerized plants may not be possible because plant canopies irregularly cover the containers (Gorski, 1993). As a result of increasing financial and environmental concerns, recent research focus has been on minimizing chemical use yet ensuring profitability in nursery crop production (Mathers, 2003).…”

mentioning

confidence: 99%

Rice Hulls, Leaf-waste Pellets, and Pine Bark as Herbicide Carriers for Container-grown Woody Ornamentals

Samtani

Kling

Mathers

et al. 2007

hortte

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An integrated approach to weed control in nursery containers is crucial if herbicide applications during the growing season are to be reduced. This experiment, conducted in 2002 and 2003 in Urbana, Ill., evaluated rice hulls, leaf-waste pellets, and pine bark as herbicide carriers for the preemergence herbicides oryzalin at 2 lb/acre a.i. and diuron at 1 lb/acre a.i. The efficacy of the treatments in controlling annual weeds and the phytotoxic effects of the treatments on the woody plant species were evaluated in separate completely randomized designs. For the efficacy experiment, no ornamental plants were present and containers were each seeded with a mixture of 1:1:1 (by volume) of annual bluegrass (Poa annua), common groundsel (Senecio vulgaris), and shepherd's purse (Capsella bursa-pastoris) immediately after treatment applications. For the phytotoxicity experiment, ‘Goldflame’ spirea (Spiraea japonica), ‘Hetz Midget’ american arborvitae (Thuja occidentalis), and ‘Snowmound’ nippon spirea (Spiraea nipponica) were evaluated. No weed seeds were sown in the phytotoxicity containers. Treatments for both experiments included spray applications of herbicides with water or with one of the organic mulches as a carrier or one of the mulches alone. Evaluations were done 45 and 120 days after treatment (DAT) in both years. The organic carriers with herbicide sprays gave efficacy visual ratings equivalent to water as a carrier for both herbicides. Phytotoxicity was not observed in the spirea species in either year. For ‘Hetz Midget’ american arborvitae in 2002, diuron with water had the highest visual phytotoxicity rating. Diuron phytotoxicity on the ‘Hetz Midget’ american arborvitae was alleviated when diuron was applied with any of the three mulches as a carrier. Pine bark treatments increased plant biomass for ‘Goldflame’ spirea in 2003, 45 DAT. At 120 DAT in 2002, pine bark gave increased plant biomass as compared with no organic mulch treatments for ‘Goldflame’ spirea. The study was conducted to ascertain whether the use of organic mulches as carriers could reduce phytotoxic effects of a herbicide on container-grown woody ornamentals, improve crop plant biomass, and act as a herbicide carrier for container-grown woody ornamentals.

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Slow-Release Delivery System for Herbicides in Container-Grown Stock

Cited by 11 publications

References 14 publications

Fabrication of a Temperature-Controlled-Release Herbicide Using a Nanocomposite

Fabrication of a Temperature-Controlled-Release Herbicide Using a Nanocomposite

Leaf-Waste Pellets as a Herbicide Carrier for Container-Grown Ornamental Plants

Rice Hulls, Leaf-waste Pellets, and Pine Bark as Herbicide Carriers for Container-grown Woody Ornamentals

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