A guide to agricultural spray adjuvants

What is the difference between an adjuvant and a surfactant?

Examples of adjuvants are surfactants, spreader stickers, crop oils, anti-foaming materials, buffering agents, and compatibility agents. Surfactants are adjuvants that facilitate and accentuate the emulsifying, dispersing, spreading, wetting, or other surface modifying properties of liquids.

What are the two classes of adjuvants?

As a result, using adjuvants can help minimize spray application problems along with increasing a pesticide’s effectiveness. Spray adjuvants can be further broken down into two groups: activator adjuvants and special-purpose adjuvants, which are also called utility adjuvants or spray modifiers.

Why we need to add adjuvant during using fungicide?

Incorporating adjuvants with fungicides may potentially improve disease control by increasing the fungicide’s penetration, by improving the fungicide’s dispersion (spread), or by extending the fungicide’s persistence on the plant.

What is a NIS adjuvant?

There are several types: Non-ionic surfactants (NIS) are the workhorses of activator adjuvants. NIS adjuvants usually aid in wetting, spreading, dispersing and emulsifying the spray to enhance herbicide activity. NIS products do their task by combining water-loving and oil-loving properties in the same molecule.

What is a good surfactant for herbicides?

In most domestic homeowner situations, the easiest and most accessible surfactant to use is dishwashing liquid. As mentioned earlier, soap contains the surfactant Sodium stearate. Liquid dishwashing liquid can be added to a tank mix of the herbicide or pesticide being applied and mixed with water.

Can you use too much surfactant?

At the end of almost every herbicide recommendation that I or anyone else makes, usually comes the comment “and add a quart of oil” or “don’t forget a surfactant.” For most herbicide recommendations these statements are usually correct.

What are the types of adjuvants?

2.1. Types of adjuvantsAdjuvantCompositionReceptor targetedAluminumOne or more of the following: amorphous aluminum hydroxyphosphate sulfate (AAHS), aluminum hydroxide, aluminum phosphate, potassium aluminum sulfate (Alum)T helper cell, NLRP3 and other innate immune cells8 more rows

Are all adjuvants the same?

With certain herbicides, one adjuvant may work better than another adjuvant or one adjuvant may be more phytotoxic resulting in greater leaf injury than another to the crop. On hot and humid days, crop oil concentrates have been known to cause more crop damage than nonionic surfactants.

What is the difference between a surfactant and a wetting agent?

The key difference between wetting agent and surfactant is that wetting agents can reduce the surface tension, allowing the liquid to spread drops to a surface, whereas surfactants can lower the surface tension between two substances. Wetting agents are a type of surfactants.

How do you mix 80/20 surfactant?

HERBICIDES – Use “80-20” SURFACTANT at the rate of 1 quart per 100 gallons of spray mixture to obtain 1/4% surfactant. Use 2 quarts per 100 gallons of spray mixture to obtain 1/2% surfactant. INSECTICIDES AND ACARICIDES – Use “80-20” SURFACTANT at the rate of 2 to 8 ounces per 100 gallons of spray mixture.

What is the difference between methylated seed oil and surfactant?

AMSO is vegetable oil that has been modified through a process of esterification. Therefore, MSO is an oilbasedsurfactant. Oil based surfactants: Slow the drying of the herbicide droplet on the leaf surface, which increases the potential for herbicide absorption.

What is nonionic surfactant?

Nonionic surfactants contain no charge. They are commonly found in laundry and dishwasher detergents. They are the second most widely used surfactants after anionic. These molecules have no charge and so they are less likely to form a ‘soap scum’ in hard water.

Leave a Comment