TAXI Herbicide: Application & Rigger Adjuvant Guide

Understanding TAXI Herbicide Application Rates

When considering crop protection strategies, understanding the precise application rates of herbicides is paramount for both efficacy and responsible agricultural practice. TAXI herbicide offers a specific guideline for its use, aiming to maximise its effectiveness while minimising potential risks. The recommended application rate for TAXI is 30 grams per hectare. This dosage is designed to provide effective weed control when used appropriately within the recommended growth stages.

However, the timing of application can influence the maximum permissible amount. If TAXI is applied before the end of February in the year of harvest, a stricter limit is imposed: no more than 10 grams of product per hectare can be applied. This adjustment is likely due to factors such as early-season crop sensitivity or potential for residue build-up later in the season.

Optimal Timing for TAXI Application

The window for applying TAXI herbicide is carefully defined to target weeds effectively during their most vulnerable stages, without harming the crop itself. TAXI may be applied from the three-leaf stage of the crop's development. This initial application period ensures that young, actively growing weeds can be targeted. The application window extends up to and includes the stage where the flag leaf is fully emerged. This corresponds to Growth Stage (GS) 39. Applying the herbicide within this broad window allows farmers flexibility depending on weather conditions and the specific weed spectrum present in their fields.

It is crucial for growers to accurately identify these growth stages to ensure that TAXI is applied within its registered parameters. Misapplication outside these stages could lead to reduced efficacy or potential crop injury.

The Role of Adjuvants: Enhancing Herbicide Performance

In modern agriculture, adjuvants play a critical role in optimising the performance of herbicides. They are added to the spray tank to improve the herbicide's ability to control target weeds. Adjuvants can influence various aspects of herbicide application, including spray retention, droplet spreading, and penetration into the weed's cuticle. This section will delve into the specifics of a particular adjuvant, Rigger, and its benefits.

What is Rigger and How Does it Differ from Other Adjuvants?

Rigger is a sophisticated agricultural adjuvant formulated as a low-viscosity methylated seed oil (MSO). Its unique composition allows it to form a stable emulsion when mixed with water, a critical factor for a consistent spray application. Rigger's primary function is to enhance herbicide efficacy. It achieves this by improving two key aspects of herbicide delivery: coverage and penetration. These improvements are particularly noticeable when dealing with weeds that have waxy cuticles, which can impede the absorption of herbicides.

Unlike some traditional surfactant-based adjuvants, MSOs like Rigger are known for their ability to spread droplets more effectively on the leaf surface and facilitate the movement of the active ingredient through the plant's waxy outer layer. This makes it a valuable tool for maximising the impact of specific herbicide chemistries.

How Does Rigger Improve Herbicide Performance?

Rigger enhances herbicide performance through a multi-faceted approach:

• Improved Spray Retention: Rigger modifies the surface tension of spray droplets, allowing them to adhere better to the weed foliage. This reduces the amount of herbicide that bounces off or runs off the target, ensuring more product stays on the leaf surface.
• Enhanced Absorption: By altering the droplet characteristics and interacting with the plant's cuticle, Rigger facilitates the penetration of the herbicide's active ingredient into the plant tissues. This means more of the chemical reaches its site of action within the weed, leading to more effective control.
• Maximised Uptake: The combined effect of better retention and penetration ensures that the maximum possible amount of the active ingredient is absorbed by the weed, leading to a more potent and reliable weed control outcome.

Which Herbicides is Rigger Best Suited For?

Rigger's formulation and mode of action make it particularly effective when used in conjunction with a range of herbicide types. It is especially recommended for use with:

• Fop herbicides: These are often post-emergence graminicides.
• Dim (dinitroanaline) herbicides: These are typically soil-applied herbicides.
• DEN herbicides: Another class of herbicides where enhanced uptake is beneficial.
• Sulfonylurea (SU) herbicides: A widely used group of herbicides known for their low use rates and high efficacy.

Furthermore, Rigger has proven to be highly beneficial when used with sugar beet herbicides and potato desiccants. In these specific applications, the ability of Rigger to improve coverage and penetration is critical for achieving the desired results, whether it's effective weed control in sugar beet or efficient desiccation of potato haulm.

How Should Rigger Be Added to the Spray Tank?

The correct order of addition for adjuvants in a spray tank is crucial for maintaining the stability and efficacy of the mixture. For Rigger, the established best practice is to always add Rigger last. This ensures that all other products, including the herbicide and any other tank-mix partners, are fully dispersed and incorporated into the water before Rigger is introduced. Continuous agitation should be maintained throughout the process to ensure proper mixing and to prevent any phase separation or instability in the spray mixture. Following this procedure helps to guarantee that Rigger can perform its function effectively without negatively impacting other components of the spray solution.

Is Rigger More Effective Than Other Adjuvant Oils?

Independent field studies have consistently shown Rigger to offer superior performance compared to alternative adjuvant oils. In comparative trials, Rigger has demonstrated the ability to provide up to 45% better coverage of the target weed surface and up to 50% better penetration through the waxy cuticle. These significant improvements highlight Rigger's advanced formulation and its capacity to deliver the herbicide's active ingredient more efficiently to its site of action. This enhanced efficacy can translate into more reliable weed control and potentially allow for reduced herbicide rates in some situations, contributing to cost savings and improved environmental outcomes.

Can Rigger Be Used on Edible Crops?

The use of adjuvants on edible crops is subject to stringent regulations to ensure food safety. According to the current adjuvant regulations in Great Britain and Northern Ireland, Rigger can be applied on edible crops. However, it is imperative that users adhere strictly to the specified application rates and intervals as detailed on the product's label. Always consult the statutory label instructions for safe and compliant use to ensure that all food safety standards are met.

Can Rigger Be Used Beyond Herbicides?

While Rigger has been specifically optimised for enhancing herbicide performance, its properties suggest potential benefits for other foliar-applied treatments. Where the target plant possesses a waxy cuticle that may impede the uptake of active ingredients, Rigger could potentially support the efficacy of other foliar treatments, such as some fungicides or plant growth regulators. However, it is always recommended to conduct compatibility testing with any new tank-mix combination before widespread application to ensure there are no adverse reactions or reduced efficacy of the primary treatment.

How Does Rigger Contribute to Environmental Stewardship?

Rigger's contribution to environmental stewardship is multifaceted. By significantly improving the efficacy of spray applications, it enables more efficient use of the herbicide's active ingredient. This enhanced performance can lead to a reduction in the overall amount of chemical required to achieve effective weed control. Furthermore, by improving droplet retention and reducing drift, Rigger helps to minimise the potential for off-target movement of herbicides, thereby reducing the risk of environmental contamination through runoff or spray drift. This more targeted and efficient application of crop protection products aligns with sustainable agricultural practices and supports the goal of reducing chemical inputs while maintaining crop health and yield.

What is the Formulation Concentration of Rigger?

Rigger boasts a high concentration of active oil in its formulation, containing 840 grams per litre (g/L) of rapeseed fatty acid esters. This high oil content is the key to its effectiveness as both a deposition and penetration enhancer. The rapeseed-derived fatty acid esters are known for their ability to interact favourably with plant cuticles and modify droplet behaviour, making them highly effective in improving the uptake of foliar-applied products.

How Was Rigger Developed and Field-Tested?

The development of Rigger was a collaborative effort, involving leading universities, respected research institutes, and independent agronomy scientists. This rigorous development process aimed to create an adjuvant that was not only scientifically sound but also practically effective in real-world farming conditions. The performance of Rigger is further validated by numerous independent trials. Many of these trials have received support from Frontier, a prominent agricultural input supplier, ensuring that the results are reliable and directly relevant to the challenges faced by farmers on the ground. This commitment to robust research and development provides growers with confidence in Rigger's capabilities.

Summary Table: Rigger Adjuvant Benefits

Frequently Asked Questions about TAXI and Rigger

Q1: What is the maximum amount of TAXI I can apply per hectare?
The standard application rate for TAXI is 30 grams per hectare. However, if applied before the end of February in the harvest year, the maximum is reduced to 10 grams per hectare.

Q2: When is the correct time to apply TAXI herbicide?
TAXI can be applied from the three-leaf stage up to the flag leaf fully emerged stage (GS 39).

Q3: Is Rigger suitable for all types of herbicides?
Rigger is particularly suited for Fop, dim, DEN, and sulfonylurea herbicides, as well as sugar beet herbicides and potato desiccants. Always check label recommendations for specific herbicide compatibility.

Q4: How do I mix Rigger into my spray tank?
Always add Rigger last to the spray tank, ensuring continuous agitation after all other products have been dispersed.

Q5: Can Rigger be used on crops intended for consumption?
Yes, Rigger can be used on edible crops in Great Britain and Northern Ireland, provided you adhere to the specified rates and intervals on the product label.

By understanding these guidelines for TAXI application and leveraging the advanced capabilities of Rigger adjuvant, farmers can achieve more effective and efficient weed management in their crops.

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