Fluensulfone Soil Application Timing for Nematode Control
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Solution Overview
Problem
Existing methods for controlling plant-parasitic nematodes, such as root-knot nematodes, often result in phytotoxicity and are less effective when applied pre-plant, necessitating improved application strategies to reduce root galling and nematode damage.
Innovation Solution
Applying fluensulfone at the time of planting or transplanting, followed by subsequent applications, at moderate rates, effectively reduces nematode damage without phytotoxicity, using formulations like emulsifiable concentrate or granules, and methods like drip irrigation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If fluensulfone is applied pre-plant at high rates, then nematode control effectiveness is improved, but phytotoxicity increases
Solution Approach 1:
The patent changes the application timing parameter from pre-plant to post-plant (at transplanting or sowing), which allows effective nematode control while reducing phytotoxicity. This parameter change resolves the contradiction by finding an optimal balance point in the application schedule that maintains efficacy while minimizing harmful effects on the plant.
Solution Approach 2:
The patent applies fluensulfone at the time of transplanting or sowing, which is a preliminary action taken before the plant establishes its root system fully. This timing allows the nematicide to be present in the soil when nematodes are most active, providing effective control while the plant is less susceptible to phytotoxicity compared to pre-plant application.
2Object-affected harmful factors
If fluensulfone is applied at moderate rates post-plant, then phytotoxicity is reduced, but nematode control effectiveness may decrease
Solution Approach 1:
The patent employs periodic applications of fluensulfone at moderate rates after planting, with subsequent applications scheduled at specific intervals. This periodic action maintains effective nematode control over time while keeping individual application rates moderate enough to avoid phytotoxicity, thus resolving the contradiction between reduced harm and maintained effectiveness.
3Duration of action of moving object
If pre-plant nematicide application is used, then nematode control is established early, but application complexity and timing constraints increase
Solution Approach 1:
The patent merges the nematicide application with the transplanting or sowing operation itself, rather than requiring a separate pre-plant application step. This integration simplifies the overall process by combining two operations into one, reducing application complexity while still establishing early nematode control through post-plant application at the time of planting.
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
Significantly reduces root galling and nematode damage, achieving low root galling indexes below 3 even 75 days after application, outperforming traditional pre-plant methods with comparable or lower fluensulfone use.
Implementation Method 1
Upon application on the soil surface, fluensulfone moves down and reaches the rhizosphere
Implementation Method 2
it is also active as a systemic molecule after plant uptake, and remains active in the roots
Data Source
AI summary
The invention relates to a method of protecting a plant against a nematode attack, comprising initiating application of fluensulfone to the soil or growth medium on the time of planting/transplanting or later.