Low carrier volume herbicide trials and UAAS support management efforts of giant salvinia (Salvinia molesta): a case study

IF 1.3 4区生物学 Q3 PLANT SCIENCES

Invasive Plant Science and Management Pub Date : 2023-05-18 DOI:10.1017/inp.2023.16

A. Howell, Erika J. Haug, W. Everman, R. León, R. Richardson

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引用次数: 0

Abstract

Abstract Expanding the current aquatic herbicide portfolio, reducing total spray volumes, or remotely delivering herbicide using novel spray technologies could improve management opportunities targeting invasive aquatic plants, where options are more limited. However, research on giant salvinia (Salvinia molesta Mitchell) response to foliar herbicide applications at carrier volumes ≤140 L ha–1 is incomplete. Likewise, no data exist documenting S. molesta control with unoccupied aerial application systems (UAAS). Following the recent >100-ha incursion of S. molesta in Gapway Swamp, NC, a case study was developed to provide guidance for ongoing management efforts. In total, three field trials evaluated registered aquatic and experimental herbicides using a 140 L ha–1 carrier volume. Select foliar applications from UAAS were also evaluated. Results at 8 wk after treatment (WAT) indicated the experimental protoporphyrinogen oxidase inhibitor, PPO-699-01 (424 g ai ha–1), in combination with endothall dipotassium salt (2,370 g ae ha–1) provided 78% visual control, whereas control when PPO-699-01 (212 g ai ha–1) was applied alone was lower at 35%. Evaluations also showed diquat (3,136 g ai ha–1) alone, glyphosate (4,539 g ae ha–1) alone, and metsulfuron-methyl (42 g ai ha–1) alone achieved 86% to 94% visual plant control at 8 WAT. Sequential foliar applications of diquat, flumioxazin (210 g ai ha–1), and carfentrazone (67 g ai ha–1) at 6 wk following exposure to in-water fluridone treatments were no longer efficacious by 6 WAT due to plant regrowth. Carfentrazone applications made from a backpack sprayer displayed greater control than applications made with UAAS deploying identical carrier volumes at 2 WAT; however, neither application method provided effective control at 8 WAT. Additional field validation is needed to further guide management direction of S. molesta control using low carrier volume foliar applications.

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低载体体积除草剂试验和UAAS支持巨型萨尔维尼亚(salvinia molesta)管理工作:一个案例研究

扩大现有的水生除草剂组合，减少总喷洒量，或使用新型喷洒技术远程投放除草剂，可以改善针对入侵水生植物的管理机会，在这些领域，选择更加有限。然而，在载体体积≤140 L ha-1的情况下，对萨尔维尼亚(salvinia molesta Mitchell)叶面施用除草剂的响应研究尚不完整。同样的，也没有数据记录S. molesta控制与无人空中应用系统(UAAS)。在北卡罗来纳州盖普韦沼泽最近发生的100多公顷的大蠊入侵事件之后，开展了一项案例研究，为正在进行的管理工作提供指导。总共进行了三次田间试验，使用140 L ha-1载体体积评估已注册的水生除草剂和实验除草剂。此外，还对不同叶面施用UAAS进行了评价。治疗后8周(WAT)的结果显示，实验用原卟啉原氧化酶抑制剂PPO-699-01 (424 g ai ha-1)联合管内双钾盐(2370 g ai ha-1)可提供78%的视觉控制，而单独使用PPO-699-01 (212 g ai ha-1)的控制率较低，为35%。评估还显示，单独使用双喹酮(3,136 g / ha-1)、单独使用草甘膦(4,539 g / ha-1)和单独使用甲磺龙-甲基(42 g / ha-1)在8瓦特时可达到86%至94%的目视植物控制效果。在暴露于水中氟啶酮处理6周后，连续叶面施用diquat、氟恶嗪(210 g ai ha-1)和卡芬曲酮(67 g ai ha-1)，由于植物再生，到6 WAT时不再有效。使用双肩包喷雾器制作的卡芬曲酮应用程序比使用UAAS在2瓦特时部署相同载体体积的应用程序显示出更好的控制效果;然而，两种应用方法均不能有效控制8 WAT。需要进一步的田间验证，以进一步指导利用低载流子体积叶面施用的管理方向。

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来源期刊

Invasive Plant Science and Management PLANT SCIENCES-

CiteScore

2.20

自引率

9.10%

发文量

审稿时长

6-12 weeks

期刊介绍： Invasive Plant Science and Management (IPSM) is an online peer-reviewed journal focusing on fundamental and applied research on invasive plant biology, ecology, management, and restoration of invaded non-crop areas, and on other aspects relevant to invasive species, including educational activities and policy issues. Topics include the biology and ecology of invasive plants in rangeland, prairie, pasture, wildland, forestry, riparian, wetland, aquatic, recreational, rights-of-ways, and other non-crop (parks, preserves, natural areas) settings; genetics of invasive plants; social, ecological, and economic impacts of invasive plants and their management; design, efficacy, and integration of control tools; land restoration and rehabilitation; effects of management on soil, air, water, and wildlife; education, extension, and outreach methods and resources; technology and product reports; mapping and remote sensing, inventory and monitoring; technology transfer tools; case study reports; and regulatory issues.