Propargite

Propaigite [2312-35-8], 2-(/>-/W2-butylphenoxy)cyclohexyl 2-propynyl sulfite (145),is adark oil (d 1.1), is insoluble in water, and hydrolyzes in alkaline solutions. The rat oral LD5Q is 2200 mg/kg. Propargite is a widely used acaricide on fruits, vegetables, and row crops. Oxythioquinox [2439-01-2], 6-methyl-2,3-quinoxalinedithiol cycHc carbonate (146) (mp 172°C, vp 26 fPa at 20°C), is insoluble in water and soluble in organic solvents with rat oral LD5Qs of 1800, 1100 mg/kg. It is used as an acaricide for tree fruits. 

Nectarines Iprodione, Phosmet, and Propargite Vitamins A, C, Potassium Bananas, Oranges... 

Propargite is an acaricide, a pesticide that kills mites and ticks. 

In California, five of the top nine pesticides used on cotton are cancer-causing chemicals (cyanazine, dicofol, naled, propargite, and trifluralin). 

Common Name Propargite Synonym Comite, Omite... 

Propaphos phosphoro organic, phosphate ester Propaquizafop heterocyclic nitrogen, quinoxaline Propargite sulfite... 

Cyclohexene 1.2 dicarboximide tetramethrin Cyclohexene oxide propargite Cyclohexyl aldehyde triapenthenol Cyclohexyl amine hexazinone, hexythiazox Cyclohexyl hydroxylamine furmecyclox Cyclohexyl magnesium bromide cyhexatin Cyclohexyl magnesium chloride cyhexatin Cyclohexyl urea lenacil... 

Reduction of Propargite Phytotoxicity Through Spray Drying... 

Propargite, a sulfite acarlclde, was comiHrcialized by Unlroyal In 1968 under the trade name of Qmite and is useful in the control of many species of mites. Q.2) The structure of propargite and some of Its physical properties are given In Table I. 

Propargite Is a specific acarlclde, which is relatively nontoxic to honeybees and many parasitic Insects. In addition, predacious mites are not eliminated from treated areas. 

A list of Inportant mite species controlled by propargite Is given In Table II. 

Use of propargite, however, is limited by its phytotoxlclty to certain crops when used at acarlcldal concentrations. 

Table III is meant as a guide but does show that phytotoxlclty is dependent not just on plant species but also on the time of application. Young cotton has an unacceptable level of crop damage the same plants, treated later in the growing season, are much less sensitive. Citrus is listed as a sensitive crop because a very low level of phytotoxicity on the fruit Itself results in a reduction in quality and hence in the price paid for the fruit. This phenomenon has kept propargite fix)m sales on citrus in spite of its excellent activity against the mites found in citrus.

The acaricldal activity of propargite occurs primarily through vapor action, while the phytotoxic effects seem to arise only from direct contact with the plant leaf or fruiting body. Conceptually, therefore, a delivery system vdiich could prevent contact with the plant, yet allow the acaricldal vapor to escape, would prevent phytotoxicity and allow use on sensitive crops. 

PETERSON Reduction of Propargite Phytotoxicity Materials and Methcds... 

Table IV gives our procedure for the preparation of spray dried propargite.

Propargite Dlatomaceous earth Wetting and dispersing surfactants... 

The phytotoxicity and acarlcldal activity of this new formulation is shown in Table V. A commercial wettable powder formulation of propargite, Omlte 30W, was used for conparison purposes. 

We believe that the shell acts as a physical barrier preventing contact of propargite with the leaf thus, the presence of a shell reduces phytotoxlclty. Because the shell is porous and inconplete, the poly vinylacetate shell does not prevent the... 

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