4.7 Article

Biological, surface, and wetting behavior of bio-surfactants tank-mixed with trifloxysulfuron-sodium on Sorghum halepense

期刊

PEST MANAGEMENT SCIENCE
卷 79, 期 4, 页码 1578-1584

出版社

JOHN WILEY & SONS LTD
DOI: 10.1002/ps.7330

关键词

humectant; johnsongrass; surface tension; surfactant; trifloxysulfuron-sodium

向作者/读者索取更多资源

There is public interest in developing bio-surfactants due to their low toxicity and high biodegradation potential. However, their biological, surface, and behavior with agrochemicals have not been investigated. The study found that the bio-surfactants rhamnolipid (RL) and surfactin (SF) were more effective in reducing the surface tension of trifloxysulfuron-sodium spray solution compared to the synthetic surfactant dioctyl sodium sulfosuccinate (DOSS). At 1.5 to 4x CMC, their effects were comparable to DOSS. RL and SF were comparable to DOSS in terms of dosage, safety, and efficacy when mixed with trifloxysulfuron-sodium.
BACKGROUNDThere is a public interest in developing bio-surfactants due to their low toxicity and high biodegradation potential. However, their biological, surface, and behavior to use with agrochemicals has not been investigated. RESULTSCritical micelle concentrations (CMCs) for the synthetic surfactant dioctyl sodium sulfosuccinate (DOSS), the bio-surfactant rhamnolipid (RL), and the bio-surfactant surfactin (SF) were 1200, 50, and 50 mg L-1, respectively. Based on the ability of the surfactants to reduce the surface tension of trifloxysulfuron-sodium spray solution at 0.25 to 1x CMC, they are ranked SF > RL > DOSS, while at 1.5 to 4x CMC, they are ranked SF = RL > DOSS. Without surfactant, trifloxysulfuron-sodium at 10.04 g ha(-1) reduced johnsongrass growth up to 50% (ED50). At best, SF at 1 to 4x CMC halved ED50. Unlike DOSS, which increased ED50 (12.89 g ha(-1)) due to a phytotoxic effect, SF and RL at 4x CMC decreased ED50 (5.19 and 6.50 g ha(-1), respectively) without a phytotoxic effect. A 5-mu l droplet containing SF dried faster due to greater spread on the leaf surface than other surfactants. Although the wetted area of the leaf with the droplet containing RL was wider than that of DOSS, it took longer to dry. This observation contradicts the previous theory. CONCLUSIONIn terms of dosage, safety, and efficacy, the RL and SF were comparable to DOSS in other tank-mix with trifloxysulfuron-sodium. It seems that RL also works as a humectant, while SF likely works as a wax solubilisant. (c) 2023 Society of Chemical Industry.

作者

我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。

评论

主要评分

4.7
评分不足

次要评分

新颖性
-
重要性
-
科学严谨性
-
评价这篇论文

推荐

暂无数据
暂无数据