Stabilized agchemical concentrate and use thereof

DETAILED DESCRIPTION What is claimed is: 1.
A stabilized agricultural chemical concentrate of (a) between about 0.
1 and about 20 wt.
% of a stabilizer composition comprising (1) between about 10 and about 90 wt.
% of a water insoluble, non-crosslinked polymer which is an N-vinyl C.
sub.
4 to C.
sub.
7 lactam/C.
sub.
4 to C.
sub.
20 alpha olefin copolymer in a weight ratio of from about 90:10 to about 20:80, wherein said lactam moiety of said lactam polymers are optionally substituted on a ring carbon atom with C.
sub.
1 to C.
sub.
4 alkyl; said polymers of (1) being dissolved in (2) between about 90 and about 10 wt.
% of a solvent selected from the group consisting of a N--C.
sub.
8 to C.
sub.
16 alkylpyrrolidone, a dibasic acid C.
sub.
1 to C.
sub.
4 alkyl ester, a non-volatile ether having a boiling point above 150.
degree.
C.
, an aromatic petroleum distillate fraction boiling between 140.
degree.
-250.
degree.
C.
and mixtures thereof and (b) between about 80 and about 99.
9 wt.
% of an agrichemical concentrate containing an effective agriculturally active amount of a water insoluble active agrichemical dissolved in between about 10 and about 80 wt.
% of an organic solvent and between about 1 and about 30 wt.
% of a surfactant mixture having a hydrophilic-lipophilic balance of from 3 to 20, said surfactant being selected from the group consisting of anionic surfactants and non-ionic surfactants and mixtures thereof.
2.
The stabilized concentrate of claim 1 wherein the polymer of (a) is a N-vinylpyrrolidone copolymer having a number average molecular weight of from about 1,000 to about 50,000.
3.
The stabilized concentrate of claim 1 wherein the polymer of (a) is a copolymer of N-vinylpyrrolidone and a C.
sub.
10 to C.
sub.
18 alpha-olefin in a weight ratio of from about 30:70 to 70:30.
4.
The stabilized concentrate of claim 3 wherein said polymer is the copolymer of N-vinylpyrrolidone and 1-hexadecene in a 50:50 weight ratio.
5.
The stabilized concentrate of claim 1 wherein between about 20 and about 70 wt.
% of the polymer of (a) is dissolved in a N--C