In:
Weed Science, Cambridge University Press (CUP), Vol. 40, No. 4 ( 1992-12), p. 576-589
Abstract:
Scanning electron micrographs of spray droplet residual on wheat, sunflower, and kochia indicated that salts and various adjuvants applied with glyphosate affected deposit crystal content, thickness, and contact with the leaf surface. Spray deposits of glyphosate applied with diammonium sulfate contained distinct crystals, which related to enhanced toxicity of glyphosate applied alone, or to overcoming antagonism of glyphosate toxicity by calcium chloride, when applied to wheat. In general, glyphosate applied with antagonistic calcium chloride salt formed spray deposits that were amorphous, thick, and without crystals. Glyphosate sprayed with nonantagonistic diammonium sulfate and ammonium chloride salts had deposits with crystals and an evenly spread residue beneath the crystals. The various micrographs indicate that the antagonism of glyphosate phytotoxicity by salts may be in part from physical entrapment of glyphosate in the spray deposit. Glyphosate spray droplet residue contact with wheat, sunflower, and kochia surfaces related to observed differences in glyphosate toxicity to these species.
Type of Medium:
Online Resource
ISSN:
0043-1745
,
1550-2759
DOI:
10.1017/S0043174500058161
Language:
English
Publisher:
Cambridge University Press (CUP)
Publication Date:
1992
detail.hit.zdb_id:
2123881-9
SSG:
12
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