Adjuvant blend for enhancing efficacy of pesticides
AssigneeNorth Dakota State University
InventorsZenon J. Woznica, Calvin Messersmith, John Nalewaja
Life of this patent
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Abstract
The present invention relates to a homogenous adjuvant blend for use in spray carriers containing herbicides. The homogenous adjuvant blend includes a nitrogen fertilizer, a pH adjuster, modified vegetable oil, and a blend of nonionic surfactants having high, intermediate, and low hydrophilic-lipophilic balance (HLB).
Claims53
A homogeneous and stable adjuvant blend comprising
- a nitrogen fertilizer in an amount of from about 30 to about 45 percent by weight of the blend;
- a pH adjuster in an amount effective for providing an alkaline pH of above about 7 to about 10 when in a final spray composition;
- a modified vegetable oil;
- from about 1 to about 20 weight percent of a high hydrophilic-lipophilic balance (HLB) nonionic surfactant having a HLB of above about 14;
- from about 3 to about 33 weight percent of at least two intermediate HLB nonionic surfactants having a HLB of above about 10 to about 14;
- and
- from about 1 to about 20 weight percent of a low HLB nonionic surfactant having a HLB of about 10 or less.
A homogenous and stable adjuvant blend for use in herbicidal spray compositions comprising:
- a nitrogen fertilizer in an amount from about 30 to about 45 percent by weight of the adjuvant blend, wherein the nitrogen fertilizer is selected from the group consisting of ammonium nitrate, urea, ammonium chloride, ammonium nitrate-urea, ammonium sulfate and mixtures thereof;
- a pH adjuster in an amount effective for providing an alkaline pH of above about 7 to about 10 in the final herbicidal spray composition, wherein the pH adjuster is selected from the group consisting of ammonium hydroxide, triethanolamine, primary amino alcohols, and mixtures thereof;
- a modified vegetable oil selected from the group consisting of methylated, ethylated and butylated seed oils;
- from about 1 to about 20 weight percent of a high hydrophilic-lipophilic balance (HLB) block copolymer nonionic surfactant having a HLB of above about 14;
- from about 3 to about 33 weight percent of at least two intermediate HLB nonionic surfactants having a HLB of above about 10 to about 14;
- and
- from about 1 to about 20 weight percent of a low HLB block copolymer nonionic surfactant having a HLB of about 10 or less.
A homogenous and stable adjuvant blend comprising
- a nitrogen fertilizer in an amount from about 30 to about 45 percent by weight of the blend;
- a pH adjuster in an amount effective for providing an alkaline pH of above about 7 to about 10 when in a final spray composition;
- a modified vegetable oil;
- from about 1 to about 20 weight percent of a high hydrophilic-lipophilic balance (HLB) nonionic surfactant having a HLB of above about 14;
- from about 3 to about 33 weight percent of a low HLB nonionic surfactant having a HLB of about 10 or less;
- and
- from about 1 to about 20 weight percent of at least two intermediate HLB nonionic surfactants.
A method of controlling weeds which comprises applying a postemergence herbicidal spray composition to weeds and/or other undesired vegetation, the herbicidal spray composition comprising a stable and homogeneous adjuvant blend, an effective amount of a postemergence herbicide, and additional water to make up the final spray composition, the adjuvant blend comprising:
- a nitrogen fertilizer in an amount from about 30 to about 45 percent by weight of the adjuvant blend;
- a pH adjuster in an amount effective for providing an alkaline pH of above about 7 to about 10 when in the spray composition;
- a modified vegetable oil;
- from about 1 to about 20 weight percent of a high hydrophilic-lipophilic balance (HLB) nonionic surfactant having a HLB of above about 14;
- from about 3 to about 33 weight percent of at least two intermediate HLB nonionic surfactants having a HLB of above about 10 to about 14;
- and
- from about 1 to about 20 weight percent of a low HLB nonionic surfactant having a HLB of about 10 or less.
A postemergence herbicidal aqueous spray composition comprising a stable and homogeneous adjuvant blend, an effective amount of a herbicide, and additional water to make up the final spray composition, the adjuvant blend comprising:
- a nitrogen fertilizer in an amount of from about 30 to about 45 percent by weight of the adjuvant blend;
- a pH adjuster in an amount effective for providing an alkaline pH of above about 7 to about 10 when in the spray composition;
- a modified vegetable oil;
- from about 1 to about 20 weight percent of a high hydrophilic-lipophilic balance (HLB) nonionic surfactant having a HLB of above about 14;
- from about 3 to about 33 weight percent of a low HLB nonionic surfactant having a HLB of about 10 or less;
- and
- from about 1 to about 20 weight percent of at least two intermediate HLB nonionic surfactants having a HLB of above about 10 to about 14.
A homogeneous and stable adjuvant blend comprising:
- a nitrogen fertilizer in an amount of from about 30 to about 45 percent by weight of the blend, the nitrogen fertilizer selected from the group consisting of urea, ammonium nitrate urea, and mixtures thereof;
- a pH adjuster in an amount effective for providing an alkaline pH of above about 7 to about 10 when in a final spray composition;
- a modified vegetable oil;
- from about 1 to about 20 weight percent of a high hydrophilic-lipophilic balance (HLB) nonionic surfactant having a HLB of above about 14;
- from about 3 to about 33 weight percent of at least two intermediate HLB nonionic surfactants having a HLB of above about 10 to about 14;
- and
- from about 1 to about 20 weight percent of a low HLB nonionic surfactant having a HLB of about 10 or less.
Dependencies are inferred from the claim text.