The contribution of spray formulation component variables to foliar uptake of agrichemicals

被引:18
作者
Forster, W. Alison [1 ]
Kimberley, Mark O. [2 ]
机构
[1] Plant Protect Chem NZ Ltd, Rotorua 3043, New Zealand
[2] Scion, Rotorua, New Zealand
关键词
Chenopodium album; triethylene glycol monododecyl ether; hexaethylene glycol monododecyl ether; decaethylene glycol monododecyl ether; trisiloxane ethoxylate; DYNAMIC SIMULATION-MODEL; PHYSICOCHEMICAL PROPERTIES; XENOBIOTIC TRANSPORT; ORGANIC-COMPOUNDS; CUTICULAR PENETRATION; ACTIVE INGREDIENT; CHENOPODIUM-ALBUM; PLANT CUTICLES; WATER SORPTION; LIVING PLANTS;
D O I
10.1002/ps.3934
中图分类号
S3 [农学(农艺学)];
学科分类号
0901 ;
摘要
BACKGROUNDThe objective of the present study was to determine the contribution of the active ingredient (AI) and surfactant, and their concentrations, to the foliar uptake of agrichemicals, and to examine the physical properties that would need to be included in a model for foliar uptake. RESULTSAll spray formulation component variables significantly affected uptake, explaining 73% of the deviance. The deviance explained by each factor ranged from 43% (AI concentration nested within AI) to 5.6% (surfactant). The only significant interaction was between AI and surfactant, explaining 15.8% of the deviance. Overall, 90% of the deviance could be explained by the variables and their first-order interactions. CONCLUSIONSUptake increased with increasing lipophilicity of the AI at concentrations below those causing precipitation on the leaf surface. AI concentration had a far greater (negative) effect on the uptake of the lipophilic molecule epoxiconazole. The uptake of 2-deoxy-D-glucose (DOG) and 2,4-dichlorophenoxyacetic acid (2,4-D) increased with increasing hydrophile-lipophile balance (HLB) of the surfactant, the effect of HLB being far greater on the hydrophilic molecule DOG. However, the differences observed in epoxiconazole uptake owing to the surfactant were strongly positively related to the spread area of the formulation on the leaf surface. For all AIs, uptake increased in a similar manner with increasing molar surfactant concentration. (c) 2014 Society of Chemical Industry
引用
收藏
页码:1324 / 1334
页数:11
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