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Effect of environmental factors on herbicidal activity of diphenamid
Year:
1974
Source of publication :
Phytoparasitica
Authors :
Blumenfeld, Titi
;
.
Horowitz, Menashe
;
.
Hulin, Nira
;
.
Volume :
2
Co-Authors:

Horowitz, M.
Hulin, N.
Blumenfeld, T.
Herzlinger, G., Div. of Weed Research, ARO, Newe Ya’ar Experiment Station, Haifa, P.O., Israel

Facilitators :
From page:
67
To page:
81
(
Total pages:
15
)
Abstract:
Diphenamid (N,N-dimethyl-2,2-diphenylacetamide) in an aqueous solution in plastic bottles was partially detoxified when exposed to sunlight for 1 week. Varying spray volumes from 300 to 1,800 I/ha did not have an appreciable effect on the phytotoxicity of diphenamid, sprayed on a coarse or fine soil surface. The marked dissipation of diphenamid which occurred from the soil surface was attributed to photodecomposition and volatilization. Diphenamid phytotoxicity was greater when the first irrigation after spraying was applied in four increments of 100 m3/ha or two increments of 200 m1/ha than when it was applied in a single 400 m1/h watering; the latter caused more leaching of the herbicide. The diphenamid fraction leached out of a 4-cm soil layer increased as the organic matter content in the soil decreased, from 25% in peat (22.3% o.m.) to >88% in sandy loam (0.9% o.m.). The herbicidal activity remaining after leaching was lower in sandy loam and in peat than in soil with medium organic matter content (11.6% and 6.2%). Diphenamid degradation rate in soil at 50% field capacity moisture level, increased when temperature was increased from 10° to 30°C. After 4 months of incubation at 10°C, 40-50% of the original herbicide was detoxified, while at 20° and 30°C the loss exceeded 90%. Within the range of day-temperatures of 10° to 40°C in soil and of 10° to 35°C in nutrient solution, diphenamid phytotoxicity to tomato seedlings increased with temperature. © 1974, Springer Science + Business Media B.V.. All rights reserved.
Note:
Related Files :
Degradation
detoxification
Diphenamid
Phytotoxicity
soil
temperature
tomato
Show More
Related Content
More details
DOI :
10.1007/BF02980291
Article number:
0
Affiliations:
Database:
Scopus
Publication Type:
article
;
.
Language:
English
Editors' remarks:
ID:
30984
Last updated date:
02/03/2022 17:27
Creation date:
17/04/2018 00:58
Scientific Publication
Effect of environmental factors on herbicidal activity of diphenamid
2

Horowitz, M.
Hulin, N.
Blumenfeld, T.
Herzlinger, G., Div. of Weed Research, ARO, Newe Ya’ar Experiment Station, Haifa, P.O., Israel

Effect of environmental factors on herbicidal activity of diphenamid
Diphenamid (N,N-dimethyl-2,2-diphenylacetamide) in an aqueous solution in plastic bottles was partially detoxified when exposed to sunlight for 1 week. Varying spray volumes from 300 to 1,800 I/ha did not have an appreciable effect on the phytotoxicity of diphenamid, sprayed on a coarse or fine soil surface. The marked dissipation of diphenamid which occurred from the soil surface was attributed to photodecomposition and volatilization. Diphenamid phytotoxicity was greater when the first irrigation after spraying was applied in four increments of 100 m3/ha or two increments of 200 m1/ha than when it was applied in a single 400 m1/h watering; the latter caused more leaching of the herbicide. The diphenamid fraction leached out of a 4-cm soil layer increased as the organic matter content in the soil decreased, from 25% in peat (22.3% o.m.) to >88% in sandy loam (0.9% o.m.). The herbicidal activity remaining after leaching was lower in sandy loam and in peat than in soil with medium organic matter content (11.6% and 6.2%). Diphenamid degradation rate in soil at 50% field capacity moisture level, increased when temperature was increased from 10° to 30°C. After 4 months of incubation at 10°C, 40-50% of the original herbicide was detoxified, while at 20° and 30°C the loss exceeded 90%. Within the range of day-temperatures of 10° to 40°C in soil and of 10° to 35°C in nutrient solution, diphenamid phytotoxicity to tomato seedlings increased with temperature. © 1974, Springer Science + Business Media B.V.. All rights reserved.
Scientific Publication
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