Prohexadione Calcium and Prothioconazole Synergy for Stem Control
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Solution Overview
Problem
Current agricultural practices face challenges in achieving a synergistic effect between growth regulators and fungicides, particularly in broad acre crops like rape seed and cereal, where simultaneous application of multiple active compounds is desired for enhanced efficacy without additional processing steps.
Innovation Solution
A method involving a water-based spraying liquid containing prohexadione calcium as a growth regulator and prothioconazole as a fungicide, combined in a ratio that provides a synergistic effect for stem length retardation, with the option of using a liquid dispersion comprising an organic hydrophobic carrier and a non-ionic emulsifier to stabilize the mixture, allowing for efficient application and reduced lodging risk.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If multiple active compounds (growth regulator and fungicide) are applied separately, then each compound can be optimized for its specific function, but the application process becomes more complex and requires additional processing steps
Solution Approach 1:
The patent combines growth regulator (prohexadione calcium) and fungicide (prothioconazole) into a single sprayable composition, allowing simultaneous delivery of both active compounds through one application process. This merging eliminates the need for separate applications while maintaining the synergistic effect between the two compounds for enhanced stem length control and plant health protection.
2Quantity of substance
If concentrated products are used, then storage and transport efficiency is improved, but mixing with water to create homogeneous solutions requires additional processing steps
Solution Approach 1:
The patent formulates the composition with active compounds dissolved or dispersed in a liquid carrier system that maintains stability and solubility at concentrations optimized for both storage and field application. The formulation parameters (solvent composition, surfactant selection, pH control) are adjusted to enable the concentrated product to mix homogeneously with water during spraying without requiring additional processing steps.
3Length of moving object
If growth regulators are applied to reduce stem length, then lodging risk is reduced, but the growth regulatory effect may be insufficient without synergistic enhancement
Solution Approach 1:
The patent creates a composite formulation combining two chemically distinct active compounds with different modes of action: prohexadione calcium (a growth regulator affecting gibberellin metabolism) and prothioconazole (a fungicide affecting sterol biosynthesis). This composite approach produces a synergistic effect where the combination achieves superior stem length control and lodging prevention compared to either compound alone, as evidenced by the enhanced growth regulatory activity described in the patent.
Data Source
AI summary
The invention relates to a water based spraying liquid suitable for spraying plants, wherein the liquid comprises water and a suitable amount of a growth regulator chosen from the group consisting of prohexadione and trinexapac-ethyl, and a fungicide chosen from the group of prothioconazole, metconazole, difenoconazole, paclobutrazole, triconazole, tebuconazole, azoxystrobin, picoxystrobin, boscalid and penthiopyrad, wherein the amount of growth regulator is between 20 and 400 g per hectare and wherein the amount of fungicide is between 20 and 500 g/ha. Preferably, the growth regulator is prohexadione-calcium, and the fungicide is prothioconazole.