Secondary Calcium Magnesium Phosphonate Mixture Fungicide
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Solution Overview
Problem
Existing fungicides based on phosphonates often exacerbate infections with Ascomycetes and require additional ingredients to counteract this effect, while also being limited in their ability to control other phytopathogenic fungi like Oomycetes and Zygomycetes, and lack a sustainable and cost-efficient production method.
Innovation Solution
A mixture of secondary calcium phosphonate and secondary magnesium phosphonate, with a specific molar ratio, is used to combat harmful fungi, offering a fungicidal effect without exacerbating Ascomycete infections and serving as a plant nutrient, produced through a method involving dolomite and phosphonic acid reaction, resulting in a low toxicity and long-lasting action.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If phosphonates are used to control phytopathogenic fungi, then protective action against fungi is improved, but pathological acerbation of Ascomycete infections occurs
Solution Approach 1:
The patent combines secondary calcium phosphonate and secondary magnesium phosphonate in a specific molar ratio (1:10 to 10:1) to create a mixture that maintains the protective action against fungi while eliminating the pathological acerbation effect on Ascomycetes. This merging of two phosphonate compounds with different properties resolves the contradiction by achieving both fungal control and avoidance of harmful side effects.
Solution Approach 2:
The invention changes the chemical composition parameters by using secondary phosphonates instead of primary phosphonates or alkali metal phosphonates, and by controlling the molar ratio of calcium to magnesium phosphonate. This parameter change transforms the harmful effect into a beneficial one, allowing effective fungicidal action without pathological acerbation.
2Reliability
If phosphonates are used to control Ascomycetes, then fungal protection is improved, but control of other phytopathogenic fungi (Oomycetes, Zygomycetes) is insufficient
Solution Approach 1:
The mixture of secondary calcium and magnesium phosphonates achieves universal fungicidal activity across multiple fungal divisions including Ascomycetes, Oomycetes, and Zygomycetes. This multi-functional capability resolves the contradiction by providing broad-spectrum protection without requiring different treatments for different fungal types.
3Quantity of substance
If water-soluble phosphonates are used for fertilizer composition, then plant nutrient availability is improved, but secondary calcium and magnesium phosphonates are excluded due to low solubility
Solution Approach 1:
The invention changes the solubility parameter acceptance by demonstrating that secondary calcium and magnesium phosphonates, despite their lower water solubility, can be effectively used in fertilizer compositions. The specific molar ratio and formulation approach overcome the solubility limitation, allowing these valuable plant nutrients (calcium and magnesium) to be incorporated into the fertilizer product.
4Reliability
If additional ingredients are added to phosphonate formulations to counteract pathological acerbation, then control of Ascomycetes is improved, but formulation complexity increases
Solution Approach 1:
Instead of adding multiple additional ingredients to counteract pathological acerbation, the invention merges secondary calcium phosphonate and secondary magnesium phosphonate in a specific ratio. This combination inherently prevents pathological acerbation without requiring extra counteracting ingredients, thus resolving the contradiction by maintaining effectiveness while reducing formulation complexity.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The mixture effectively controls a broad spectrum of phytopathogenic fungi, including Ascomycetes, Oomycetes, and Zygomycetes, acts as a safe and sustainable plant nutrient, and is produced using readily available and inexpensive materials, providing both immediate and long-term fungicidal protection.
Implementation Method 1
A method for preparing a mixture containing secondary calcium phosphonate and secondary magnesium phosphonate is provided
Data Source
AI summary
The present invention relates to the use of mixtures containing secondary calcium and secondary magnesium phosphonate for combatting harmful fungi, to the use thereof as fertilizer or plant nutrient, to a mixture, containing secondary calcium and secondary magnesium phosphonate in a specific molar ratio, characterized in that the solid form of the mixture has a water solubility of at most 5 g/l, and to a method for preparing a mixture containing secondary calcium phosphonate and secondary magnesium phosphonate.