Organic acid slow-release compound with insect-resistant and disease-resistant functions, its preparation and application
An organic acid and compound technology, applied in the fields of application, botany equipment and methods, biocides, etc., can solve the problems of high toxicity of pesticides, health threats, and the decline of pesticide resistance to insects and diseases, so as to solve the problems of pesticide residues, biological good compatibility
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Embodiment 1
[0044] (1) Dissolve 1mol chitosan in 100mL 2% (w / v) acetic acid solution to obtain chitosan-acetic acid solution, stir for 1d, add NaOH to produce precipitation, filter, rinse with distilled water several times, add a small amount of methanol to disperse , to obtain solution A;
[0045] (2) Add a solution containing 1 mol of tetraethylenepentamine to the solution A obtained in step (1), add dropwise a solution containing 1 mol of epichlorohydrin under stirring, and continue stirring at 40° C. for 2 d. Add acetone to make it precipitate completely, wash it clean, add a small amount of ethanol to disperse, and obtain solution B;
[0046] (3) Dissolve 1 mol of salicylic acid in a small amount of ethanol, mix the solution B obtained in step (2), and react under reflux at 40° C. for 3 hours. 50% ethanol is recovered to obtain an organic acid slow-release compound with insect and disease resistance functions.
Embodiment 2
[0048] (1) Dissolve 1mol chitosan in 100mL 2% (w / v) acetic acid solution to obtain a chitosan-acetic acid solution, stir for 1.5d, add NaOH to produce a precipitate, filter, rinse with distilled water several times, add a small amount of methanol Disperse to obtain solution A;
[0049] (2) Add a solution containing 1 mol of tetraethylenepentamine to the solution A obtained in step (1), add dropwise a solution containing 1 mol of epichlorohydrin under stirring, and continue stirring at 80° C. for 1 d. Add acetone to make it precipitate completely, wash it clean, add a small amount of ethanol to disperse, and obtain solution B;
[0050] (3) Dissolve 1 mol of salicylic acid in a small amount of ethanol, mix the solution B obtained in step (2), and react under reflux at 80° C. for 1 h. 80% ethanol is recovered to obtain an organic acid slow-release compound with insect and disease resistance functions.
Embodiment 3
[0052] (1) Dissolve 1mol chitosan in 100mL 2% (w / v) acetic acid solution to obtain a chitosan-acetic acid solution, stir for 2 days, add NaOH to produce a precipitate, filter, rinse with distilled water several times, add a small amount of methanol to disperse , to obtain solution A;
[0053] (2) Add a solution containing 1 mol of tetraethylenepentamine to solution A obtained in step (1), add dropwise a solution containing 1 mol of epichlorohydrin under stirring, and continue to stir and react at 60° C. for 1.5 days. Add acetone to make it precipitate completely, wash it clean, add a small amount of ethanol to disperse, and obtain solution B;
[0054] (3) Dissolve 1 mol of salicylic acid in a small amount of ethanol, mix the solution B obtained in step (2), and react under reflux at 60° C. for 2 hours. 60% ethanol is recovered to obtain an organic acid slow-release compound with the function of preventing insects and diseases.
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