QAL Study Guide_ Non-Soil Fumigation Techniques
Fumigant Pesticide that exists as gas or turns into gas.
Volatile Substance that readily turns into gas.
Gases Fumigants stored under pressure in cylinders.
Liquified gases Stored as liquids, release gas upon exposure.
Volatile liquids Liquid at normal temperatures, release active
ingredient.
Solids Packaged pellets that react with moisture.
Non-selective pesticide Kills various pest organisms indiscriminately.
Killing action factors Influenced by concentration, time, temperature,
humidity.
No residual property Fumigants do not provide post-application pest
control.
Advantages of fumigants Effective against pests in hard-to-reach areas.
, QAL Study Guide_ Non-Soil Fumigation Techniques
Disadvantages of fumigants Highly toxic to humans and non-target organisms.
PPE for fumigation Special protective equipment required for
applicators.
Molecular weight Measure of atom weight in a molecule.
Specific gravity Density ratio compared to a standard substance.
Specific gravity of air Standard for gases, equals 1.
Heavy fumigants Specific gravity greater than 1, sink.
Light fumigants Specific gravity less than 1, rise.
Volatility Ease of vaporization of a substance.
Vapor pressure Pressure exerted by vapor in equilibrium.
Methyl bromide Example of a liquified gas fumigant.
, QAL Study Guide_ Non-Soil Fumigation Techniques
Sulfuryl fluoride Another example of a liquified gas fumigant.
Dazomet Solid fumigant that releases MITC.
Aluminum phosphide Solid fumigant that releases phosphine gas.
Metam sodium Volatile liquid that releases MITC upon exposure.
Vapor Pressure Measurement of a substance's tendency to
vaporize.
Closed Container A sealed environment preventing gas escape.
Vaporization Process of a substance transitioning from liquid to
gas.
Vapor pressure Pressure exerted by vapor above liquid.
Volatility Tendency of a substance to vaporize.
Boiling point Temperature where liquid turns to gas.
, QAL Study Guide_ Non-Soil Fumigation Techniques
Solubility Ability of a gas to dissolve in liquids.
Flammability Capacity of a substance to catch fire.
Chemical reactivity Substance's tendency to react chemically.
Diffusion Molecules spreading evenly in a space.
Sorption Process of molecules adhering to or penetrating
surfaces.
Adsorption Molecules sticking to a surface.
Absorption Molecules penetrating a material.
Desorption Release of gas from a surface.
Aeration period Time for fumigant to desorb post-treatment.
Phosphine Toxic gas from aluminum or magnesium phosphide.
Fumigant Pesticide that exists as gas or turns into gas.
Volatile Substance that readily turns into gas.
Gases Fumigants stored under pressure in cylinders.
Liquified gases Stored as liquids, release gas upon exposure.
Volatile liquids Liquid at normal temperatures, release active
ingredient.
Solids Packaged pellets that react with moisture.
Non-selective pesticide Kills various pest organisms indiscriminately.
Killing action factors Influenced by concentration, time, temperature,
humidity.
No residual property Fumigants do not provide post-application pest
control.
Advantages of fumigants Effective against pests in hard-to-reach areas.
, QAL Study Guide_ Non-Soil Fumigation Techniques
Disadvantages of fumigants Highly toxic to humans and non-target organisms.
PPE for fumigation Special protective equipment required for
applicators.
Molecular weight Measure of atom weight in a molecule.
Specific gravity Density ratio compared to a standard substance.
Specific gravity of air Standard for gases, equals 1.
Heavy fumigants Specific gravity greater than 1, sink.
Light fumigants Specific gravity less than 1, rise.
Volatility Ease of vaporization of a substance.
Vapor pressure Pressure exerted by vapor in equilibrium.
Methyl bromide Example of a liquified gas fumigant.
, QAL Study Guide_ Non-Soil Fumigation Techniques
Sulfuryl fluoride Another example of a liquified gas fumigant.
Dazomet Solid fumigant that releases MITC.
Aluminum phosphide Solid fumigant that releases phosphine gas.
Metam sodium Volatile liquid that releases MITC upon exposure.
Vapor Pressure Measurement of a substance's tendency to
vaporize.
Closed Container A sealed environment preventing gas escape.
Vaporization Process of a substance transitioning from liquid to
gas.
Vapor pressure Pressure exerted by vapor above liquid.
Volatility Tendency of a substance to vaporize.
Boiling point Temperature where liquid turns to gas.
, QAL Study Guide_ Non-Soil Fumigation Techniques
Solubility Ability of a gas to dissolve in liquids.
Flammability Capacity of a substance to catch fire.
Chemical reactivity Substance's tendency to react chemically.
Diffusion Molecules spreading evenly in a space.
Sorption Process of molecules adhering to or penetrating
surfaces.
Adsorption Molecules sticking to a surface.
Absorption Molecules penetrating a material.
Desorption Release of gas from a surface.
Aeration period Time for fumigant to desorb post-treatment.
Phosphine Toxic gas from aluminum or magnesium phosphide.
