Classifications

• • A—HUMAN NECESSITIES
  • A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
  • A01N—PRESERVATION OF BODIES OF HUMANS OR ANIMALS OR PLANTS OR PARTS THEREOF; BIOCIDES, e.g. AS DISINFECTANTS, AS PESTICIDES OR AS HERBICIDES; PEST REPELLANTS OR ATTRACTANTS; PLANT GROWTH REGULATORS
  • A01N43/00—Biocides, pest repellants or attractants, or plant growth regulators containing heterocyclic compounds
  • A01N43/48—Biocides, pest repellants or attractants, or plant growth regulators containing heterocyclic compounds having rings with two nitrogen atoms as the only ring hetero atoms
  • A01N43/50—1,3-Diazoles; Hydrogenated 1,3-diazoles
• • A—HUMAN NECESSITIES
  • A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
  • A01N—PRESERVATION OF BODIES OF HUMANS OR ANIMALS OR PLANTS OR PARTS THEREOF; BIOCIDES, e.g. AS DISINFECTANTS, AS PESTICIDES OR AS HERBICIDES; PEST REPELLANTS OR ATTRACTANTS; PLANT GROWTH REGULATORS
  • A01N51/00—Biocides, pest repellants or attractants, or plant growth regulators containing organic compounds having the sequences of atoms O—N—S, X—O—S, N—N—S, O—N—N or O-halogen, regardless of the number of bonds each atom has and with no atom of these sequences forming part of a heterocyclic ring
• • C—CHEMISTRY; METALLURGY
  • C07—ORGANIC CHEMISTRY
  • C07D—HETEROCYCLIC COMPOUNDS
  • C07D233/00—Heterocyclic compounds containing 1,3-diazole or hydrogenated 1,3-diazole rings, not condensed with other rings
  • C07D233/04—Heterocyclic compounds containing 1,3-diazole or hydrogenated 1,3-diazole rings, not condensed with other rings having one double bond between ring members or between a ring member and a non-ring member
  • C07D233/20—Heterocyclic compounds containing 1,3-diazole or hydrogenated 1,3-diazole rings, not condensed with other rings having one double bond between ring members or between a ring member and a non-ring member with substituted hydrocarbon radicals, directly attached to ring carbon atoms
• • C—CHEMISTRY; METALLURGY
  • C07—ORGANIC CHEMISTRY
  • C07D—HETEROCYCLIC COMPOUNDS
  • C07D233/00—Heterocyclic compounds containing 1,3-diazole or hydrogenated 1,3-diazole rings, not condensed with other rings
  • C07D233/04—Heterocyclic compounds containing 1,3-diazole or hydrogenated 1,3-diazole rings, not condensed with other rings having one double bond between ring members or between a ring member and a non-ring member
  • C07D233/28—Heterocyclic compounds containing 1,3-diazole or hydrogenated 1,3-diazole rings, not condensed with other rings having one double bond between ring members or between a ring member and a non-ring member with hetero atoms or with carbon atoms having three bonds to hetero atoms with at the most one bond to halogen, e.g. ester or nitrile radicals, directly attached to ring carbon atoms
  • C07D233/44—Nitrogen atoms not forming part of a nitro radical
  • C07D233/52—Nitrogen atoms not forming part of a nitro radical with hetero atoms directly attached to said nitrogen atoms

Definitions

• This invention pertains to methyl-substituted cyclic nitroethylenes and nitroguanidines as arthro- podicides, particularly for the control of planthoppers and leafhoppers.
• GB 1,483,633 generically discloses compounds of the present invention as insecticides.
• WO 91/17659 generically discloses a method to control planthoppers and leafhoppers with the compounds of the present invention.
• U.S. 4,880,933 generically discloses compounds of the present invention as intermediates for insecticides. There are no specific disclosures in these references to compounds of the present invention.
• the invention comprises compounds of Formula I, including all geometric and stereoisomers, agriculturally suitable salts thereof, agricultural compositions containing them and their use for the control of arthropods, particularly planthoppers and leafhoppers, in both agronomic and nonagronomic environments.
• the compounds of Formula I comprise:
• R 1 is H, CH 2 CN, C 1 -C 4 alkyl, 1 .-C 4 haloalkyl, formyl, C 2 -C alkylcarbonyl, C 2 -C 3 alkoxy- carbonyl, C 2 -C 4 alkoxyalkyl, C 3 -C 6 dialkoxy- alkyl, C 1 -C 3 alkoxy, C- ⁇ -C- ⁇ alkylsulfonyl, C 2 -C 4 alkenyl, C 2 -C 4 alkynyl, C 1 -C 4 alkylamino, C 2 -C 4 dialkyla ino or benzyl optionally substituted with R 2 ;
• R 2 is halogen, ⁇ -0 2 alkyl, C 1 -C 2 haloalkyl, C x -C 2 alkoxy, C x -C 2 alkylthio, C 1 -C 2 haloalkylthio,
• Preferred Compounds A are compounds of Formula I wherein R 1 is H, C1-C4 alkyl, formyl, CH 3 S(0) 2 or CH 3 C(0) .
• Preferred Compounds B are Compounds A wherein Z is CHN0 2 .
• Preferred Compounds C are Compounds A wherein Z is NN0 2 .
• Preferred Compounds B and Preferred Compounds C are:
• compositions of the present invention are those containing the above designated preferred compounds.
• Preferred methods for controlling foliar and soil inhabiting anthropods and nematode pests are those employing the above designated compounds and compositions.
• alkyl used either alone or in compound words such as “alkythio” or “haloalkyl”, denotes straight chain or branched alkyl such as methyl, ethyl, n-propyl, isopropyl or the di ferent butyl isomers.
• Alkoxy denotes methoxy, ethoxy, n-propyloxy and isopropyloxy.
• Alkenyl denotes straight chain or branched alkenes such as vinyl, 1-propenyl, 2-propenyl and the different butenyl isomers.
• Alkynyl denotes straight or branched alkynes such as ethynyl, 1-propynyl, 2-propynyl and the different butynyl isomers.
• Alkylthio denotes methylthio and ethylthio.
• Alkylsulfonyl and alkylamino are defined analogously to the above examples.
• Halogen either alone or in compound words as "haloalkyl” denotes fluorine, chlorine, bromine or iodine. Further, when used in compound words such as "haloalkyl" said alkyl may be partially or fully substituted with halogen atoms, which may be the same or different. Examples of haloalkyl include CH 2 CHF 2 , CF 2 CF 3 and CH 2 CHFC1.
• C ! -C 3 alkyl- sulfonyl designates methylsulfonyl through propyl- sulfonyl
• C 2 alkoxy designates OCH CH 3 and C 3 alkoxy designates OCH 2 CH 2 CH 3 and OCH(CH 3 ) 2
• C 2 alkylcarbonyl designates C(0)CH 3 and C alkylcarbonyl designates C(O)CH 2 CH 2 CH 3 and C(O)CH(CH 3 ) 2
• C 3 alkoxycarbonyl designates C(0)OCH 2 CH 3 and C 4 alkoxycarbonyl designates C(0)CH 2 CH CH 3 and C(0)CH(CH 3 ) 2 .
• the Formula II compounds are typically used in equimolar or stoichiometric excess amounts and include alkylating " agents such as alkyl halides and sulfonates, acylating agents such as acy halides and anhydrides, and sulfonylating agents such as sulfonyl halides and anhydrides.
• the proton acceptor species is typically used in amounts ranging from 1 to 20 molar equivalents and include metal hydrides such as NaH and KH, amide bases such as lithium diisopropylamide, amine bases such, as pyridine and triethylamine, inorganic carbonates such as lithium, sodium, potassium and cesium carbonate, metal alkoxides such as sodium methoxide and potassium tert-butoxide, and hydroxides such as NaOH and KOH.
• metal hydrides such as NaH and KH
• amide bases such as lithium diisopropylamide
• amine bases such, as pyridine and triethylamine
• inorganic carbonates such as lithium, sodium, potassium and cesium carbonate
• metal alkoxides such as sodium methoxide and potassium tert-butoxide
• hydroxides such as NaOH and KOH.
• Typical solvents include polar, aprotic solvents such as dimethylformamide, N-methyl pyrrolidone and acetonitrile, ethers such as diethyl ether and tetrahydrofuran, and protic solvents such as methanol, ethanol, propanol and water.
• Typical reaction temperatures range from 0°C to the reflux temperature of the solvent and reaction times range from 5 minutes to several days.
• the reactions depicted in Scheme 2 typically involve the mixture of equimolar amounts of III and IV in the presence of one equivalent of a base such as NaH in a polar, aprotic solvent such as DMF at a temperature ranging from room temperature to 150°C, with 100°C being preferred.
• a base such as NaH
• a polar, aprotic solvent such as DMF
• the product is typically isolated by removal of the solvent followed by column chromatography on silica gel using a suitable solvent or solvent mixture including, but not limited to, chloroform, methylene chloride, methanol, ethanol, ethyl acetate, triethylamine, saturated aqueous ammonium hydroxide or mixtures of these solvents.
• Formula I compounds wherein R 1 is equal to H and Z is equal to CHN0 2 can be prepared by the reaction of diamine V with a compound of Formula VI as depicted in Scheme 3.
• X is a leaving group such as SCH 3 , OCgH 5 or halogen.
• Scheme 3 reactions typically involve the mixture of equimolar amounts of V and VI (usually 1,1-bis(methyl thio)-2-nitroethylene) in a polar solvent such as, but not limited to, methanol, ethanol, acetonitrile, tetrahydrofuran " or water at a temperature ranging from room temperature to the reflux temperature of the solvent.
• a proton acceptor such as, but not limited to, NaOH, sodium carbonate or triethylamine can be used.
• _ ⁇ Alternatively, compounds of Formula I wherein R 1 is H and Z is CHN0 2 can be prepared by the reaction of diamine V with a ' 2,2,2-trihalonitroethane of Formula VII as depicted in Scheme 4 using conditions analogous to those described or Scheme 3 reactions.
• Scheme 4 reactions typically involve the use of between 1 and 10 molar equivalents of a base such as, but not limited to, amines such as triethylamine and pyridine, carbonates such as Na C0 3 , K 2 C0 3 and NaHC0 3 or hydroxides such as LiOH, NaOH or KOH.
• a base such as, but not limited to, amines such as triethylamine and pyridine
• carbonates such as Na C0 3 , K 2 C0 3 and NaHC0 3
• hydroxides such as LiOH, NaOH or KOH.
• Formula I compounds wherein R 1 is H and Z is NN0 2 can be prepared by the reaction of diamine V with either nitroguanidine VIII, (wherein Y is NH 2 ) or S-methyl-N-nitroisothiourea VIII, (wherein Y is SCH 3 ) using procedures that are completely analogous to those described for Scheme 3.
• nitroguanidine VIII wherein Y is NH 2
• S-methyl-N-nitroisothiourea VIII wherein Y is SCH 3
• Formula III compounds wherein Z equals CHN0 2 can be prepared by the reaction of 1,2-diaminopropane IX with Formula VI compounds as depicted in Scheme 6. Conditions for carrying out these reactions are completely analogous to those described for Scheme 3. SCHEME 6
• X is a leaving group such as SCH 3 or OCgH 5 .
• Step ii
• Step i of Scheme 7 2-(methylthio)ethylamine (X) is treated with potassium cyanide and acetaldehyde in the presence of one to two equivalents of acid in a solvent to form aminonitrile XI.
• Other cyanide salts as well as HCN can be used in the procedure.
• Hydrohalide and other acid salts of X can be used in the procedure.
• Suitable solvents include, but are not limited to,, methanol, ethanol, isopropanol and water, as well as combinations of solvents.
• Many alternative procedures for the preparation of amino nitriles such as XI can be found in the literature (see, e.g., Synth . Commun . , 1985, 15, 157; Synthesis, 1979, 127).
• Step ii of Scheme 1 aminonitrile XI is reduced to form diamine V.
• This reduction is most conveniently achieved using lithium aluminum hydride in amounts ranging from 0.75 to 3 mo ⁇ ar equivalents in a solvent such as diethyl ether or THF at a temperature ranging from -10°C to the reflux temperature of the solvent.
• the reduction of XI to form V can be achieved using hydrogenation over a catalyst such as palladium on carbon.
• Step B N 2 -[2-(Methylthio)ethyl]-1,2-propanediamine
• a vigorously stirred (mechanical stirrer) solution of lithium aluminum hydride (84 mL of a 1 M solution in (CH 3 CH 2 ) 2 0, 0.084 moles) and (CH 3 CH 2 ) 2 0 (163 mL) was treated with a solution of 6.04 g (0.042 moles) of the product from Step A and 82 mL of (CH 3 CH 2 ) 2 0 added dropwise at 0°C.
• the resulting white heterogeneous mixture was stirred at 0°G for 1 h, at room temperature for 1 h and then cooled to 0°C and quenched by the careful, sequential addition of a solution of 3.1 mL H 2 0 in 10 L of tetrahydrofuran, 3.1 mL of 15% NaOH and 9.3 mL of H 2 0 at 0°C.
• the resulting mixture was diluted with 155 L of (CH 3 CH 2 ) 2 0 and stirred at room temperature overnight.
• the resulting mixture was filtered and the filtrate was concentrated to give 6.4 g of a dark yellow oil.
• Step C 5-Methyl-l-T2-(methylthio)ethyll-2-(nitro- methylene)-imidasplidine (Compound 1)
• a solution of 2.6 g (0.018 moles) of the product from Step B, 2.9 g (0.018 moles) of 2,2-bis-(methyl- thio)-1-nitroethylene and 18 mL of absolute ethanol was heated at reflux for 5 h, cooled to room temperature and concentrated to give 4.8 g of a brown oil. Flash chromatography of the oil on silica gel using 40:1:0.1 CH 2 Cl 2 :CH 3 CH 2 OH:48% NH 4 OH gave 1.8 g of a yellow oil that solidified on standing, m.p. 60-62°C.
• compositions of the present invention comprise an effective amount of a compound of Formula I and at least one of (a) a surfactant, (b) an organic solvent, and (c) at least one solid or liquid diluent
• useful formulations can be prepared in conventional ways. They include dusts, granules, baits, pellets, solutions, suspensions, emulsions, wettable powders, emulsifiable concentrates, dry flowables and the like. Sprayable formulations can be extended in -suitable media and used at spray volumes from about one to several hundred liters per hectare.
• compositions are primarily used as intermediates for further formulation.
• the " formulations will typically contain effective amounts of an active ingredient, diluent and a surfactant within the following approximate ranges wherein the active ingredient plus surfactant and/or diluent equals 100 weight percent.
• compositions Typical solid diluents are described in atkins, et al.. Handbook of Insecticide Dust Diluents and Carriers, 2nd Ed., Dorland Books, Caldwell, New Jersey. The more absorptive diluents are preferred for wettable powders and the denser ones for dusts.
• Typical liquid diluents and solvents are described in Marsden, Solvents Guide, 2nd Ed., Interscience, New York, 1950. Solubility under 0.1% is preferred for suspension concentrates; solution concentrates are preferably stable against phase separation at 0°C. McCutcheon 's Detergents and Emulsifier ⁇ Annual, Allured Publ.
• ingredients should be approved by the U.S. Environmental Protection Agency, or a similar governmental agency in the country of use, for the use intended.
• compositions are well known. Solutions are prepared by simply mixing the ingredients. Fine solid compositions are made by blending and, usually, grinding as in a hammer mill or fluid energy mill. Water-dispersible granules can be produced be agglomerating a fine powder composition; see for example, Cross et al., Pesticide Formulations, Washington, D.C, 1988, pp. 251-259. Suspensions are prepared by wet-milling; see, for example, U.S. 3,060,084. Granules and pellets can be made by spraying the active material upon preformed granular carriers or by agglomeration techniques. See Browning, "Agglomeration", Chemical Engineering, December 4, 1967, pages 147 and following.
• Pellets can be prepared as described in U.S. 4,172,714. Water-dispersible and water-soluble granules can be prepared as taught in DE 3,246,493.
• Compound 1 20% blend of oil soluble sulfonates and polyoxyethylene ethers 10% isophorone 70%
• the ingredients are combined and stirred with gentle warming to speed solution.
• a fine screen filter is included in packaging operation to insure the absence of any extraneous undissolved material in the product.
• Example B Wettable Powder Compound 1 30% sodium alkylnaphthalenesulfonate 2% sodium ligninsulfonate 2% synthetic amorphous silica 3% kaolinite 63%
• the active ingredient is mixed with the inert materials in a blender. After grinding in a hammer- mill, the material is re-blended and sifted through a 50 mesh screen.
• Example C fiuat Wettable powder of Example B 10% pyrophyllite (powder) 90%
• Example D The wettable powder and the pyrophyllite diluent are thoroughly blended and then packaged. The product is suitable for use as a dust.
• Example D The wettable powder and the pyrophyllite diluent are thoroughly blended and then packaged. The product is suitable for use as a dust.
• the active ingredient is dissolved in a volatile solvent such as acetone and sprayed upon montmorillonite granules in a double cone blender.
• a volatile solvent such as acetone
• the acetone is then driven off by heating.
• the granules are then allowed to cool and are packaged.
• N-methyl-pyrrolidone 75% The ingredients are combined and stirred to produce a solution suitable for direct, low volume application.
• Compound 2 40.0% polyacrylic acid thickener 0.3% dodecyclophenol polyethylene glycol ether 0.5% disodium phosphate 1.0% monosodium phosphate 0.5% polyvinyl alcohol 1.0% water 56.7%
• the ingredients are blended and ground together in a sand mill to produce particles substantially all under 5 microns in size.
• the ingredients are blended and the moistened with. about 20% water.
• the mixture is extruded as cylinders about 1 mm diameter which break into pieces generally ranging from 1 to 10 mm in length. These are dried and used as described in Example I.
• Compound 1 is dissolved in acetone and sprayed upon the pre-formed granules in a mixer. The acetone is driven off by heating. The granules are then allowed to cool and are packaged.
• Compound 1 3.0% blend of polyethoxylated nonylphenols and sodium dodecylbenzene sulfonates 9.0% ground up corn cobs 88.0%
• the active ingredient and surfactant blend are dissolved in a suitable solvent such as acetone and sprayed onto the ground corn cobs.
• a suitable solvent such as acetone
• the granules are then dried and packaged.
• the compounds of this,;invention exhibit activity against a wide spectrum of foliar-feeding, fruit- feeding, seed-feeding, aquatic and soil-inhabiting arthropods (term includes insects, mites and nematodes) which are pests of growing and stored agronomic crops, forestry, greenhouse crops, ornamentals, nursery crops, stored food and fiber,products, livestock, household, and public and animal health.
• arthropods term includes insects, mites and nematodes
• all of the compounds of this invention display activity against pests that include: eggs, larvae and adults of the Order Lepidoptera; eggs, foliar-feeding, fruit-feeding, root-feeding, seed-feeding larvae and adults of the Order Coleoptera; eggs, immatures and adults of the
• the compounds of this invention are also active against pests of the Orders Hymenoptera, Isoptera, Phthiraptera, Siphonoptera, Blattaria, Thysanaura and Pscoptera; pests belonging to the class of Arachnida; and Helminthes.
• the compounds are particularly active against southern corn rootworm ⁇ Diabrotica undecimpunctata howardi) , aster leafhopper (Mascrosteles fascifrons) r boll weevil ⁇ Anthonomus grandis) , two-spotted spider mite (Tetranychus urticae) , fall armyworm (Spodoptera frugiperda) , black bean aphid (Aphis fabae) , tobacco budworm (Heliothis virescens) , rice water weevil (Lissorhoptrus oryzophilus) , rice leaf beetle (Oulema oryzae) , whitebacked planthopper (Sogatella furcifera) , green leafhopper (Nephotettix cincticeps) , brown planthopper (Nilaparvata lugens) , small brown planthopper
• Compounds of this invention can also be mixed with one or more other insecticides, fungicides, nema- tocides, bactericides, acaricides, semiochemicals, repellants, attra ⁇ tants, pheromones, feeding stimulants or other biologically active compounds to form a multi- component pesticide giving an even broader spectrum of agricultural protection.
• insecticides such as monocrotophos, carbofuran, tetrachlorvinphos, alathion, parathion-methyl, methomyl, chlordimeform, diazinon, deltamethrin, oxamyl, fenvalerate, esfenvalerate, permethrin, profenofos, sulprofos, triflumuron, diflubenzuron, methoprene, buprofezin, thiodicarb, acephate, azinphosmethyl, chlorpyrifos, dimethoate, fonophos, isofenphos, methidathion, metha- midophos, phosmet, phosphamidon, phosalone, pirimicarb, phorate, terbufos, trichlorfon, methoxychlor.
• insecticides such as monocrotophos, carbofuran, tetrachlorvinpho
• the present invention further comprises a method for the control of foliar and soil inhabiting arthropods and nematode pests and protection of agronomic crops, animal and human health comprising applying one or more of the compounds of Formula I, or compositions containing at least one such compound, in an effective amount, to the environment of the pests including the agronomic and/or nonagronomic locus of infestation, to the area to be protected, or directly on the pests to be controlled.
• a preferred method of application is by spraying with equipment that distributes the compound in the environment of the pests, on the foliage, animal, person, or premise, in the soil or animal, to the plant part that is infested or needs to be protected.
• granular formulations of these compounds can be applied to the foliage or applied to or incorporated into the soil or rice paddys.
• Other methods of application can also be employed including direct and residual sprays, aerial sprays, systemic uptake, baits, eartags, boluses, foggers, fumigants, aerosols, and many others.
• the compounds can be incorporated into baits that are consumed by the arthropods or in devices such as traps and the like which entice them to ingest or otherwise contact the compounds.
• the compounds of this invention can be applied in their pure state, but most often application will be of a formulation comprising one or more compounds with suitable carriers, diluents, and surfactants and possibly in combination with a food depending on the contemplated end use.
• a preferred method of application involves spraying a water dispersion or refined oil solution of the compounds. Combinations with spray oils, spray oil concentrations, spreader stickers, adjuvants, and synergists and other solvents such as piperonyl butoxide often enhance compound efficacy.
• the rate of application required for effective control will depend on such factors as the species of arthropod to be controlled, the pest's life cycle, life stage, its size, location, time of year, host crop or animal, feeding behavior, mating behavior, ambient moisture, temperature, and the like. In general, application rates of about 0.01 to 2 kg of active ingredient per hectare are sufficient to provide large- scale effective control of pests in agronomic ecosystems under normal circumstances, but as little as 0.001 kg/hectare may be sufficient or as much as 8 kg hectare may be required. For nonagronomic applications, effective use rates will range from about 1.0 to 50 mg/square meter but as little as 0.1 mg/square meter may be sufficient or as much as 150 mg/square meter may be required.
• Test units were high impact styrene trays with 12 cells.
• the cells contained water moistened filter paper and approximately 8 square cm of lima leaf.
• the units each consisting of an 8-ounce (230 ml) plastic cup containing 1 one-inch square of a soybean- wheatgerm diet, were prepared.
• the test units were sprayed as described in Test A with individual solutions of the test compounds. After the spray on the cups had dried, five second-instar larvae of the southern corn rootworm (Diabrotic undecimpunctata howardi) were placed into each cup. The cups were then covered and held at 27°C and 50% relative humidity for 48 hours, after which time mortality readings were taken. Of the compounds tested, the following gave mortality levels of 80% or higher after 48 hours: 1, 2, 3, 4. Test C
• Test units were prepared from a series of 12-ounce (350 ml) cups, each containing oat (Avena sativa) seedlings in a 1-inch (2.5 cm) layer of sterilized soil and a 1/2-inch layer of sand.
• the test units were sprayed as described in Test A with individual solutions of the below-listed compounds.
• the cups were held at 27°C and 50% relative humidity for 48 hours, after which time mortality readings were taken. Of the compounds tested, the following gave mortality levels of 80% or higher: 1 , 2, 4.
• Test E Black bean aphid
• the leaves were then set in 3/8 inch diameter vials containing 4 ml of sugar water solution and covered with a clear plastic 1-ounce portion cup to prevent escape of aphids that drop from the leaves.
• the test units were held at 27°C and 50% relative humidity for 48 hours, after which tii ⁇ e mortality readings were taken. Of the compounds tested, the following gave mortality levels of 80% or higher: 1, 2, 3.
• the test chemical is added directly into 10 mL of distilled water and dissolved completely.
• This chemical solution is poured into a conical shaped test unit.
• Three rice seedlings are then positioned in the unit by a notched sponge disk.
• the sponge disk allows complete immersion of the seedling root systems in the chemical solution, while the aerial portion of the plant is isolated above the solution.
• the sponge also prevents the test nymphs from accidentally contacting the test solution.
• the concentration of the test chemical in the chemical solution is 100 ppm.
• the rice seedlings are allowed to absorb the chemical from the solution for 24 hours in a growth chamber held at 27°C and 65% relative humidity.
• Three rice (Oryza sativa) seedlings, 1.5 leaf stage and about 10 cm tall are transplanted into a 1/2 oz. plastic cup containing Kumiai Brown artificial soil. Seven milliliters of distilled water is then added to the cup.
• the test chemical is prepared by first dissolving the chemical in acetone and then adding water to produce a final test concentration of 75:25 (acetone:water) .
• Four plastic cups, each cup serving as a replicate, are then placed on a spray chamber turntable. The cups are sprayed for 45 seconds with 50 mL of the chemical solution at a pressure of 2.0 kg/cm 2 with air atomizing spray nozzles. The turntable completes 7.5 rotations during the 45 second spray interval.
• treated cups are held in a vented enclosure to dry for about 2 h. After drying, the cups are placed into conical shaped test units and the surface of the soil covered ⁇ with 2 to 3 mm of quartz sand. Eight to ten 3rd-instar nymphs of the green leafhopper (Nephotettix cincticeps) are transferred into the test units using an aspirator. The test units are held at 27°C and 65% relative humidity. _ Counts of the number of live and dead nymphs are taken at 24 and 48 h post-infestation. Insects which cannot walk are classified as dead. Of the compounds tested, the following gave mortality levels of 80% or higher at 48 h at 100 ppm: 1, 2, 4.
• Test I Contact Activity against Brown Planthopper Nymphs
• Three rice (Oryza sat ⁇ va) seedlings, 1.5 leaf stage and about 10 cm tall are transplanted into a 1/2 oz. (14 mL) plastic cup containing Kumiai Brown artificial soil. Seven milliliters of distilled water is then added to the cup.
• the test chemical is prepared by first dissolving the chemical in acetone and then adding water to produce a final test concentration of 75:25 (acetone:water) .
• Four plastic cups, each cup serving as a replicate, are then placed on a spray chamber turntable. The cups are sprayed for 45 seconds with 50 mL of the chemical solution at a pressure of 2.0 kg/cm 2 with air atomizing spray nozzles.
• the turntable completes 7.5 rotations during the 45 second spray interval.
• treated cups are held in a vented enclosure to dry for about 2 h. After drying, the cups are placed into conical shaped test units and the surface of the soil covered with 2 to 3 mm of quartz sand.
• Eight to ten 3rd-instar nymphs of the brown planthopper (Nilaparvata lugens) are transferred into the test units using an aspirator.
• the test units are held at 27°C and 65% relative humidity. Counts of the number of live and dead nymphs are taken at 24 and 48 h post-infestation. Insects which cannot walk are classified as dead.
• Test J is a comparison of Compound 1 vs . the nor- methyl derivative which is generically disclosed in GB 1,483,633 and specifically disclosed in WO 91/17659 as compound 14 (page 96) . The compounds were tested individually under the same conditions but not in a direct comparison.
• Test J Table 3 compares the observed activity of present Compound 1 with nor-methyl derivative (Compound A) .
• the compounds were tested individually but not in a direct comparison under 'the conditions as described in the Tests H and I above except that the application rate was 2.5 ppm,

Landscapes

• Life Sciences & Earth Sciences (AREA)
• Organic Chemistry (AREA)
• Chemical & Material Sciences (AREA)
• Dentistry (AREA)
• Health & Medical Sciences (AREA)
• Engineering & Computer Science (AREA)
• Plant Pathology (AREA)
• General Health & Medical Sciences (AREA)
• Wood Science & Technology (AREA)
• Zoology (AREA)
• Environmental Sciences (AREA)
• Pest Control & Pesticides (AREA)
• Agronomy & Crop Science (AREA)
• Agricultural Chemicals And Associated Chemicals (AREA)

Applications Claiming Priority (3)

Publications (1)

Family

ID=25350572

Family Applications (1)

Country Status (6)

Families Citing this family (1)

Family Cites Families (3)

• 1993
  • 1993-03-10 EP EP93907385A patent/EP0636122A1/en not_active Withdrawn
  • 1993-03-10 WO PCT/US1993/002165 patent/WO1993021161A1/en not_active Application Discontinuation
  • 1993-03-10 JP JP5518315A patent/JPH07505652A/ja active Pending
  • 1993-03-10 AU AU38007/93A patent/AU3800793A/en not_active Abandoned
  • 1993-03-10 BR BR9306266A patent/BR9306266A/pt not_active Application Discontinuation
  • 1993-04-13 CN CN 93104216 patent/CN1077451A/zh active Pending

Non-Patent Citations (1)

Also Published As

Similar Documents

Legal Events