SU212179A1 - - Google Patents

Description

METHOD OF BORBBIA WITH VNOKOMBSHI VREDNB1MI AND Ticks

It is known to use mixed thiophosphonates as insecticides.

The present invention relates to the use as insecticides and acaricides of previously unknown mixed thiophosphonates, containing, as an ester group, lactone residues of the general formula

where RI is lower alkyl; Rs is hydrogen or lower alkyl, X and Z are oxygen or sulfur, of which Z is attached:

a) in the | 3-position of the lactone ring, when Y is represented by an oxygen or sulfur atom and R2 is alkenyl, branched chain alkyl, aralkyl or cycloalkyl,

b) in the a-position of the lactone ring, when R2Y together represents a heterocyclic or amino group, the nitrogen atom of which is attached directly to the phosphorus atom or Y represents an oxygen atom or

sulfur and R2-alkenyl, ar-alkenyl, haloalkenyl, aryl, aralkyl, halo- or methoxyzamesh, enan aralkyl, heterocyclic alkyl, alkylmercaptoalkyl, aminoalkyl, mono- or dialkoxycarbomylalkyl, or 2- 5-methyl-2-oxotetrahydropy- buty- sucroxy-tetramethyl, or mono- or dialkoxycarbomylalkyl or 2- 5-methyl-2-oxotetrahydropy- butyroxy-acetoxy, or alkoxy (ethyl) - or 3-5-methyl-2-oxotetrahydrofur-3-ylthio (methyl) phosphinthoyloxy - propyl radical.

These compounds are highly toxic to insects, including mosquito larvae, aphids, ticks, cotton pests, moth caterpillars, weevils, Colorado beetles, and common domestic flies.

The compounds are less toxic for mammals than conventional organophosphate pesticides and have a systemic effect. The advantage of some of the described compounds over known phosphorus-containing pesticides is greater activity against various forms of caterpillars.

Usually the preparation is applied to the leaves infected with parasites, but they can be used to destroy the parasites that live in different places. For example, it can be applied to the soil in which it is grown, or which is intended for cultivation

plants for the destruction of worms, cabbage flies and other parasites living in the soil.

The composition can be applied in the form of powdered formulations containing a small amount of the compound in a mixture of a significant amount of solid diluent. Thinner is isolin, Fuller's earth, gypsum, chalk, porcelain clay and.

Since a significant portion of the compounds are liquid at ordinary temperatures, it is more convenient to use them in the form of liquid preparations, usually aqueous dispersions or emulsions containing surface active substances, for example a wetting or dispersing agent.

Another method for preparing liquid preparations is to dissolve the compounds in an organic solvent, such as benzene, methanol, ethanol, or acetone, followed by displacing the solution with water containing a surfactant.

Preparations may be made in the form of concentrates. Concentrates may contain from 10 to 85% by weight of the compound, preferably 25-650 / o-oh concentrates are used by weight. A particularly satisfactory form has a concentrate consisting of a concentrated solution of the compound in an organic solvent containing a surfactant, also soluble in this solvent. Diluted formulations suitable for use in the form of aqueous dispersions may contain various amounts of the basic substance. Good compositions are obtained by applying 0.025-0.2 D / o by weight of the substance. Ready-to-use formulations can be applied by conventional methods, for example by dusting or spraying, depending on the form of the composition, either liquid or solid. The compositions can also be applied in the form of aerosols.

A significant amount of compounds falling under the general formula at a concentration of O, I / and causes the death of more than 90Vo of the insects listed above.

Subject invention

The use of shifted thiophosphonates, containing 1, as a single ester group, residues of lactones of the general formula

 -z-rr

v °

II Oh

where RI is lower alkyl, R3 is hydrogen nl, and lower alkyl,

X and Z-atom of oxygen or sulfur, of which Z is attached:

a) in the p-position of the lactone ring, when Y is represented by an oxygen or sulfur atom

and R2-alkenyl, and keel with branched chains, aralkyl or cycloalkyl;

b) in the a-position of the lactone ring, when R2Y together represents a heterocyclic or amino group, a nitrogen atom that is attached directly to a phosphorus atom, or Y represents an oxygen or sulfur atom and R2-alkenyl, aralkenne, haloalkenyl, aryl, aralkyl, halo- or methoxy-substituted aralkyl, alkyl heterocyclic, alkilmerkaptoalkil, aminoalkyl, mono- or dialkoksikarbonilalkil 2- or 5-methyl-2-oksotetragidrofur - 3-ylthio (methyl) fosfintioiloksi (ethyl) - 3- or 5-meth: yl-2-oksotetragidrofur- 3-ylthio (methyl) phosphonnoyloxy - propyl Dikal, as an insecticide and akarptsida for struggle with harmful insects n mites.