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).
Claims60
An 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 formulated in a final spray composition;
- a modified vegetable oil;
- a high hydrophilic-lipophilic balance (HLB) nonionic surfactant having a HLB of above about 14;
- at least two intermediate nonionic surfactants having a HLB of above about 10 to about 14;
- and
- a low HLB nonionic surfactant having a HLB of about 10 or less.
A homogenous 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 of 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;
- a high hydrophilic-lipophilic balance (HLB) block copolymer nonionic surfactant having a HLB of above about 14;
- at least two intermediate nonionic surfactants having a HLB of above about 10 to about 14;
- and
- a low HLB block copolymer nonionic surfactant having a HLB of about 10 or less.
A homogenous 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;
- a high hydrophilic-lipophilic balance (HLB) nonionic surfactant having a HLB of above about 14;
- a low HLB nonionic surfactant having a HLB of about 10 or less;
- and
- 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 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 formulated the spray composition;
- a modified vegetable oil;
- a high hydrophilic-lipophilic balance (HLB) nonionic surfactant having a HLB of above about 14;
- at least two intermediate nonionic surfactants having a HLB of above about 10 to about 14;
- and
- a low HLB nonionic surfactant having a HLB of about 10 or less;
- an effective amount of a postemergence herbicide;
- and
- additional water to make up the final spray solution.
A postemergence herbicidal aqueous spray composition 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 formulated in the spray composition;
- a modified vegetable oil;
- a high hydrophilic-lipophilic balance (HLB) nonionic surfactant having a HLB of above about 14;
- a low HLB nonionic surfactant having a HLB of about 10 or less;
- at least two intermediate nonionic surfactants having a HLB of above about 10 to about 14;
- and
- an effective amount of a herbicide;
- and
- additional water to make up the spray composition.
Dependencies are inferred from the claim text.