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BACKGROUND OF THE INVENTION
1. Field of the Invention
The present invention relates to novel thiazinephosphonic acid derivatives, production thereof, and pesticides comprising the thiazine phosphonic acid derivatives as an effective ingredient.
2. Prior Art
A lot of insecticides containing phosphorus atom are commercially available at present, while any insecticides having a thiazine ring are not known. A phosphonic acid diester bound to the nitrogen atom of a morphorinyl group is disclosed in JPN Unexamd. Pat Publn. No.49-101545, but no phosphorus compound having a thiazine ring is known.
BRIEF SUMMARY OF THE INVENTION
The present invention relates to a compound of the formula (I): ##STR2## wherein R.sup.1 and R.sup.2 each is lower alkoxy, lower alkynyloxy, lower alkylthio, arylthio, or lower alkylamino; R.sup.3 and R.sup.4 each is hydrogen or lower alkyl; R.sup.5, R.sup.6, and R.sup.7 each is hydrogen, lower alkyl, lower alkoxy, halogen, or trifluoromethyl; and X is oxygen or sulfur and production thereof; and it also relates to a pesticidal composition comprising one or more of said compounds and one or more carriers.
The compound (I) can be prepared by reacting a 2-phenylimino-3,4,5,6-tetrahydro-2H-1,3-thiazine (II) with a reactive phosphonic acid derivative (III). ##STR3## wherein R.sup.1, R.sup.2, R.sup.3, R.sup.4, R.sup.5, R.sup.6, R.sup.7, and X each has the same meaning as defined above; and Y is a leaving group.
DETAILED DESCRIPTION OF THE INVENTION
The present invention relates to a compound of the formula (I): ##STR4## wherein R.sup.1 and R.sup.2 each is lower alkoxy, lower alkynyloxy, lower alkylthio, arylthio, or lower alkylamino; R.sup.3 and R.sup.4 each is hydrogen or lower alkyl; R.sup.5, R.sup.6, and R.sup.7 each is hydrogen, lower alkyl, lower alkoxy, halogen, or trifluoromethyl; and X is oxygen or sulfur and it also relates to a pesticidal composition comprising one or more of said compounds (I) and one or more carriers.
Furthermore, the present invention also relates to a process for preparing the compound of the formula (I): ##STR5## wherein R.sup.1 and R.sup.2 each is lower alkoxy, lower alkynyloxy, lower alkylthio, arylthio, or lower alkylamino; R.sup.3 and R.sup.4 each is hydrogen or lower alkyl; R.sup.5, R.sup.6, and R.sup.7 each is hydrogen, lower alkyl, lower alkoxy, halogen, or trifluoromethyl; and X is oxygen or sulfur, which comprises reacting a compound of the formula (II): ##STR6## wherein R.sup.3, R.sup.4, R.sup.5, R.sup.6, and R.sup.7 each has the same meaning as defined above, with a compound of the formula (III): ##STR7## wherein R.sup.1, R.sup.2, and X each has the same meaning as defined above; and Y is a leaving group.
The present inventors have investigated various organic phosphorus pesticides and found that the 2-phenylimino-tetrahydro-1,3-thiazine-3-phosphonic acid esters (I) have potent pesticidal activities with low toxicities against human beings or animals. This invention is based on these findings.
The definitions in the above formulae will be explained in more detail as follows.
The group attached by the term "lower" in the definitions means a group having not more than 6 carbon atoms, especially not more than 5 carbon atoms, unless the term is particularly defined.
"The lower alkyl" means straight or branched chain saturated hydrocarbon residue, in particular C.sub.1 -C.sub.5 alkyl. Examples of the lower alkyl are methyl, ethyl, propyl, isopropyl, butyl, isobutyl, sec-butyl, tert-butyl, pentyl, isopentyl, tert-pentyl, neo-pentyl, 1-methylbutyl, 1,2-dimethylpropyl, hexyl, and the like.
"The lower alkoxy" means a group formed from the above lower alkyl and a bivalent oxygen. Representatives of the lower alkoxy are C.sub.1 -C.sub.6 alkoxy such as methoxy, ethoxy, propoxy, isopropoxy, butoxy, pentyloxy, hexyloxy, and the like.
"The alkynyloxy" includes C.sub.2 -C.sub.5 alkynyloxy, for example, ethynyloxy, 2-propynyloxy, 3-butynyloxy, 4-pentynyloxy, etc.
"The alkylthio" means a group formed from the lower alkyl and a bivalent sulfur, especially C.sub.1 -C.sub.6 alkylthio, for example, methylthio, ethylthio, propylthio, isopropylthio, butylthio, pentylthio, hexylthio, etc.
"The alkylamino" includes a group formed from the lower alkyl and an imino. Examples of the lower alkylamino are C.sub.1 -C.sub.6 alkylamino such as methylamino, ethylamino, propylamino, isopropylamino, butylamino, pentylamino, hexylamino, and the like.
"The arylthio" is aryl, preferably a group formed from a monocyclic aryl or monocyclic aromatic group bound to a bivalent sulfur. The arylthio includes phenylthio, tolylthio, xylylthio, and the like.
"The halogen" includes fluorine, chlorine, bromine, iodine, and the like.
"The leaving group" means a group which can be easily eliminated during the reaction. Examples of the leaving group are acid residues such as chlorine, bromine iodine, and the like. The compound (I) can be prepared according to the following reaction sequence. ##STR8## wherein R.sup.1, R.sup.2, R.sup.3, R.sup.4, R.sup.5, R.sup.6, R.sup.7, and X each has the same meaning as defined above; and Y is a leaving group.
The reaction can be carried out even in the absence of a solvent, but preferably it proceeds in the presence of a solvent.
As the solvent, inert solvent such as aliphatic hydrocarbons (e.g., n-hexane, cyclohexane, etc.), aromatic hydrocarbons (e.g., benzene, toluene, xylene, etc.), ketones (e.g., acetone, methyl isobutyl ketone, etc.), ethers (e.g., diethyl ether, tetrahydrofurane, dioxane, etc.), halogenohydrocarbons (e.g., dichloromethane, chlorobenzene, etc.), and the like can be employed.
Preferably, this reaction is carried out in the presence of an acid-acceptor (a base).
The acid-acceptor includes organic base such as aliphatic tertiary amine (e.g., trimethylamine, triethylamine, tributylamine, etc.), aromatic amine (e.g., dimethylaniline, diethylaniline, etc.), and heterocyclic amine (e.g., pyridine, .alpha.-picoline, .gamma.-picoline, etc.); and inorganic base such as sodium carbonate, potassium carbonate, and the like.
The reaction may be carried out at a temperature of 0.degree..about.100.degree. C., preferably at a temperature of 20.degree..about.80.degree. C. and it terminates within a period of 1 to 12 hours, preferably 2 to 8 hours.
The product can be isolated in a conventional manner for purification such as extraction, recrystallization, column-chromatography, or the like.
The starting material (II) may be prepared according to the following reaction sequence. ##STR9## wherein R.sup.3, R.sup.4, R.sup.5, R.sup.6, and R.sup.7 each has the same meaning as defined above.
The reaction of the compound (IV) with the compound (V) may be carried out in the absence or presence of a solvent with stirring at a temperature of 0.degree..about.60.degree. C. for 10.about.60 minutes. The solvent includes ether, benzene, and the like.
The compound (IV) is prepared from the corresponding amine in the same manner as described in, for example, J. Org. Chem. 29, 3098 (1964).
The compound (VI) can be converted into the compound (II) under reflux in the presence of an acid such as hydrochloric acid for 1 to 3 hours.
[Effect]
The compounds (I) have potent pesticidal activities against harmful plant-parasitic nematodes, insects belong to Orthoptera, Hemiptera, Lepidoptera, Diptera, Coleoptera (beetles), and mites. The compounds (I) can be employed by themselves or in a formulation such as powder, granules, wettable powder, emulsion, suspension, aerosol, flowable, and the like by mixing with appropriate solid or liquid carriers and adjuvants.
The formulations can be prepared in a conventional manner.
The solid carriers include vegetable powder (e.g., corn, soybean, wheat, wood), mineral powder (e.g., clay, bentonite, acid clay, vermiculite, talc, diatomaceous earth, pumice, active carbon), synthetic resin (e.g., vinyl chloride, polystyrene), and the like.
The liquid carriers include hydrocarbons (e.g., kerosene, solvent naphtha, toluene, xylene), alkanols (e.g., methanol, ethanol, ethylene glycol, polypropylene glycol), ethers (e.g., dioxane, cellosolve), ketones (e.g., methyl isobutyl ketone, cyclohexanone), halogenohydrocarbons (e.g., dichloroethane, trichloroethane), esters (e.g., dioctylphthalate), amides (e.g., dimethylformamide), nitriles (e.g., acetonitrile), fats and oils; and water.
As the adjuvant, surface active agents, wetting agents, sticking agents, thickeners, stabilizers, and the like may be employed. Examples of the adjuvants are anionic surface active agents (e.g., alkyl sulfonate, lignin sulfonate, alkylsulfate), nonionic surface active agents (e.g., alkylpolyoxyethylene ether, sorbitan ester, polyoxyethylene fatty acid ester, sucrose ester), water-soluble high-molecular compounds (e.g., casein, gelatin, CMC, PVA, gum arabic, alginic acid) can be used.
The compounds (I) are preferably used at a concentration of 0.1.about.99.9%, preferably 20.about.80% in the above formulation.
Furthermore, the compounds (I) can be used in combination with other insecticides, fungicides, herbicides, soil modifiers, fertilizers, and the like.
The application rate should be decided in consideration of the application method, application time, application place, objective insects, mites, or nematodes; or objective plants; generally the application rate is 1.about.500 g/10 are.
The present invention will be explained in more detail by the following Examples and the effect of the present invention will be confirmed by the following Experiments.
EXAMPLE 1
(Compound No. 25)
To a mixture of 5.64 g (25.6 mmol) of 2-phenylimino-5,5-dimethyl-3,4,5,6-tetrahydro-2H-1,3-thiazine, 2.85 g (28.2 mmol) of triethylamine, and 50 ml of benzene is dropwise added 5.29 g (25.6 mmol) of S-sec-butyl O-methyl monochlorothiolphosphonate with stirring at 10.degree..about.20.degree. C. The mixture is allowed to react at 25.degree..about.30.degree. C. for 6 hours; and the resulting triethylamine hydrochloride is removed by filtration. The benzene layer is washed with 3% hydrochloric acid, 3% aqueous sodium carbonate, and water; and then concentrated under reduced pressure to give 9.91 g of an oily material. The oily material is purified by silica-gel column chromatography (Wako gel C-300: registered trademark; solvent: n-hexane/acetone=10/1); and the fractions containing the objective compound are collected and the solvent is removed under reduced pressure to give 6.99 g (yield: 70.6%) of white crystalline S-sec-butyl O-methyl 2-phenylimino-5,5-dimethyl-3,4,5,6-tetrahydro-2H-1,3-thiazine-3-thiolphosp honate. m.p.: 41.0.degree..about. 42.5.degree. C.
EXAMPLE 2
(Compound No. 36)
To a mixture of 5.00 g (18.6 mmol) of 2-[(2-methyl-4-chlorophenyl)imino]-5,5-dimethyl-3,4,5,6-tetrahydro-2H-1,3- thiazine, 2.07 g (20.5 mmol) of triethylamine, and 50 ml of toluene is dropwise added 3.77 g (18.6 mmol) of S-sec-butyl O-methyl monochlorothiol-phosphonate at 10.degree..about.20.degree. C. The mixture is stirred at 30.degree..about.35.degree. C. for 4 hours. The resulting triethylamine hydrochloride is removed by filtration; the toluene layer is concentrated under reduced pressure to give 8.05 g of pale yellowish viscous oily material. The oily material is purified in the same manner as in Example 1 and the resultant transparent liquid is cooled to give 4.59 g (yield: 56.7%) of white crystalline S-sec-butyl O-methyl 2-[(2-methyl-4-chlorophenyl)imino]-5,5-dimethyl-3,4,5,6-tetrahydro-2H-1,3- thiazine-3-thiolphosphonate, m.p. 48.5.degree..about.49.5.degree. C.
EXAMPLE 3
(Compound No. 2)
To a mixture of 1.00 g (5.20 mmol) of 2-phenylimino-3,4,5,6-tetrahydro-2H-1,3-thiazine, 0.58 g (5.72 mmol) of triethylamine, and 10 ml of toluene is dropwise added 1.14 g (5.20 mmol) of O-ethyl S-n-propyl monochlorodithiophosphonate with stirring at 10.degree..about.20.degree. C. The mixture is stirred at 25.degree..about.30.degree. C. for 4 hours. The resulting triethylamine hydrochloride is removed by filtration, the toluene layer is concentrated under reduced pressure to give 1.56 g a pale yellowish viscous oily material. The oily material is purified in the same manner as in Example 1 to give 1.21 g (yield: 62.1%) of O-ethyl S-n-propyl 2-phenylimino-3,4,5,6-tetrahydro-2H-1,3-thiazine-3-dithiophosphonate as colorless transparent liquid. n.sub.D.sup.25 =1.5337.
The physical constants of the compounds provided in the above Examples and those of the compounds (I) prepared in the same manner as in Examples 1.about.3 are shown in the following Table 1.
TABLE 1
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Compd.
No. R.sup.1,
R.sup.2
R.sup.3,
R.sup.4
R.sup.5
R.sup.6
R.sup.7
X mp (.degree.C.)
(temp. .degree.C.)
.sup.n D
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1 EtO EtO H H H H H S colorless liquid (25)1.5713
2 EtO n-PrS
H H H H H S colorless liquid (25)1.5337
3 EtO i-PrNH
H H H H H S white crystals
48.0.about.50.0
4 EtO EtO H H H H H O colorless liquid (25)1.5517
5 EtO n-PrS
H H H H H O colorless liquid (20)1.5877
6 MeO MeO H H H H H O white crystals
74.0.about.75.5
7 n-PrO n-PrO
H H H H H O colorless liquid
8 EtO MeNH
H H H H H S colorless liquid (20)1.5532
9 EtO i-BuS
H H H H H O colorless liquid (20)1.5786
10 MeO s-BuS
H H H H H O colorless liquid (20)1.5845
11 EtO s-BuS
H H H H H O colorless liquid (20)1.5811
12 EtO MeS H H H H H O colorless liquid
13 EtO i-PrNH
H H 2-Me
4-Cl
H S white crystals
77.0.about.78.5
14 EtO n-PrS
H H 2-Me
4-Cl
H O colorless liquid (25)1.5610
15 EtO n-PrS
H H 2-Me
4-Cl
H S colorless liquid
16 EtO i-BuS
H H 2-Me
4-Cl
H O colorless liquid (20)1.5736
17 EtO MeS H H 2-Me
4-Cl
H O white crystals
86.5.about.87.5
18 MeO s-BuS
H H 2-Me
4-Cl
H O colorless liquid (20)1.5854
19 EtO s-BuS
H H 2-Me
4-Cl
H O colorless liquid (20)1.5775
20 EtO i-PrS
H H 2-Me
4-Cl
H O colorless liquid (20)1.5773
21 EtO i-PrNH
H H 3-CF.sub.3
H H S colorless liquid (25)1.5350
22 EtO EtO Me Me H H H O white crystals
33.0.about.34.5
23 EtO n-PrS
Me Me H H H O white crystals
37.5.about.39.0
24 EtO i-BuS
Me Me H H H O white crystals
40.5.about.42.0
25 MeO s-BuS
Me Me H H H O white crystals
41.0.about.42.5
26 EtO n-BuS
Me Me H H H O pale yellowish liquid
(20)1.5632
27 EtO C.sub.6 H.sub.5 S
Me Me H H H O colorless liquid (20)1.6009
28 EtO EtO Me Me 2-MeO
H H O pale brownish viscous liquid
29 EtO n-PrS
Me Me 2-MeO
H H O pale yellowish liquid
30 MeO s-BuS
Me Me 2-MeO
H H O pale yellowish liquid
(20)1.5578
31 EtO s-BuS
Me Me 2-MeO
H H O pale brownish liquid
(20)1.5619
32 EtO n-PrS
H H 2-MeO
H H O pale brownish viscous liquid
33 MeO s-BuS
H H 2-MeO
H H O pale brownish liquid
34 EtO s-Bus
H H 2-MeO
H H O white crystals
45.0.about.46.5
35 EtO n-PrS
Me Me 2-Me
4-Cl
H O white crystals
70.0.about.71.5
36 MeO s-BuS
Me Me 2-Me
4-Cl
H O white crystals
48.5.about.49.5
37 EtO n-BuS
Me Me 2-Me
4-Cl
H O colorless liquid (20)1.5604
38 EtO EtO Me Me 2-Me
4-Cl
H O white crystals
45.0.about.46.5
39 MeO n-BuS
Me Me 2-Me
4-Cl
H O colorless liquid (20)1.5574
40 MeO i-BuS
Me Me 2-Me
4-Cl
H O yellow liquid (20)1.5631
41 EtO n-PrS
H H H 4-n-Bu
H O colorless liquid (20)1.5639
42 EtO n-PrS
Me Me H 4-n-Bu
H O colorless liquid (20)1.5549
43 MeO s-BuS
Me Me H 4-n-Bu
H O pale yellowish liquid
(20)1.5552
44 EtO s-BuS
Me Me H 4-n-Bu
H O colorless liquid (20)1.5513
45 EtO n-BuS
Me Me H 4-n-Bu
H O colorless liquid (20)1.5503
46 EtO n-PrS
H H 2-Me
6-Me
H O white liquid (20)1.5728
47 MeO s-BuS
H H 2-Me
6-Me
H O white liquid (20)1.5582
48 EtO n-BuS
H H 2-Me
6-Me
H O white crystals
50.0.about.51.5
49 CH.tbd.CCH.sub.2 O
EtS H H 2-Me
6-Me
H O white crystals
77.5.about.78.5
50 MeO s-BuS
H H 2-i-Pr
H H O colorless liquid
51 EtO s-BuS
H H 2-i-Pr
H H O colorless liquid (20)1.5626
52 CH.tbd.CCH.sub.2 O
EtS H H 2-i-Pr
H H O white crystals
83.0.about.84.0
53 EtO C.sub.6 H.sub.5 S
H H 2-i-Pr
H H O colorless liquid (20)1.6004
54 EtO n-PrS
Me Me 2-i-Pr
H H O white crystals
50.5.about.52.0
55 MeO s-BuS
Me Me 2-i-Pr
H H O colorless liquid (20)1.5579
56 EtO s-BuS
Me Me 2-i-Pr
H H O white crystals
54.0.about.55.5
57 EtO C.sub.6 H.sub.5 S
Me Me 2-i-Pr
H H O colorless liquid (20)1.5883
58 MeO s-BuS
Me Me 2-Me
6-Me
H O colorless viscous liquid
(20)1.5542
59 MeO s-BuS
Me Me 2-Et
6-Et
H O colorless viscous liquid
(20)1.5507
60 MeO s-BuS
Me Me 2-i-Pr
6-i-Pr
H O white crystals
78.5.about.80.0
61 MeO s-BuS
Me Me 2-Me
4-Me
H O white viscous liquid
(20)1.5603
62 MeO s-Bus
Me Me H 4-EtO
H O pale yellowish viscous
(20)1.5736
63 MeO s-BuS
Me Me 2-F 4-F H O white crystals
77.0.about.79.0
64 EtO n-PrS
Me Me 2-F 4-F H O white crystals
65.0.about.66.0
65 MeO s-BuS
Me Me 2-Cl
4-Me
H O colorless liquid (20)1.5680
66 EtO n-PrS
Me Me 2-Cl
4-Me
H O white crystals
51.5.about.53.5
67 EtO EtO Me Me 4-n-Bu
H H O colorless transparent
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liquid
Note
Me: methyl;
Et: ethyl;
Pr: propyl;
Bu: butyl
EXAMPLE 4
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(Percent by weight)
______________________________________
Effective ingredient (Compound No. 25)
2
Clay 88
Talc 10
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The above components are mixed to give a powder.
EXAMPLE 5
______________________________________
(Percent by weight)
______________________________________
Effective ingredient (Compound No. 36)
30
Diatomaceous earth 45
White carbon 20
Sodium lauryl sulfate 3
Sodium lignin sulfate 2
______________________________________
The above components are mixed to give a wettable powder.
EXAMPLE 6
______________________________________
(Percent by weight)
______________________________________
Effective ingredient (Compound No. 2)
20
Xylene 60
Polyoxyethylene phenylphenol polymer
20
emulsifier
______________________________________
The above components are mixed to give an emulsion.
REFERENTIAL EXAMPLE
(Production of starting material)
A mixture of 18.0 g (0.068 mol) of N-4-n-butylphenyl-N'-3-hydroxypropylthiourea and 20 ml of 12N HCl is heated under reflux for 1 hour. After cooling, the mixture is basified with 100 ml of 4N NaOH and extracted with chloroform. The extract is dried and concentrated; and the resulting residue is recrystallized from hexane to give 14.7 g (yield: 88%) of 2-[(4-n-butylphenyl)imino]-3,4,5,6-tetrahydro-2H-1,3-thiazine, m.p. 77.degree..about.78.5.degree. C.
The compounds (II) provided in the same manner as in the above Referential Example are shown in Table 2.
TABLE 2
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R.sup.3 R.sup.4 R.sup.5 R.sup.6
R.sup.7
mp (.degree.C.)
______________________________________
H H H H H 118-119
Me Me H H H 157-158
H H 4-n-Bu H H 77-78.5
Me Me 4-n-Bu H H 126-127
H H 2-Me 4-Cl H 133-134
Me Me 2-Me 4-Cl H 155.5-157
H H 2-MeO H H 126-129.5
Me Me 2-MeO H H 97-99
H H 2-i-Pr H H 151-152
Me Me 2-i-Pr H H 155-157
H H 2-Me 6-Me H 131-132
Me Me 2-Me 6-Me H 158-160
H H 4-EtO H H 128-130
Me Me 2-Me 4-Me H 135-138
Me Me 2-i-Pr 6-i-Pr H 199-200
Me Me 2-Et 6-Et H 132-133
Me Me 2-F 4-F H 169-171
H H 3-CF.sub.3
H H 152-152.5
Me Me 2-Cl 4-Me H 145-147
______________________________________
(Note)
Me: methyl; Et: ethyl; Pr: propyl; Bu: butyl
EXPERIMENT 1
[Preparation of a test solution]
A solution of the compound (I) in a small amount of DMF (dimethylformamide) is diluted with distilled water containing TWEEN 20 (registered trademark) at a concentration of 100 ppm to prepare a predetermined amount of the test solution.
[Test Method]
A. Insecticidal test on larvae of Spodoptera litura
Cabbage leaves (5.times.5 cm) were soaked in the test solution and dried in air. Ten larvae (2 instar) of Spodoptera litura were put on the 2 cabbage leaves in a Petri dish (9 cm in diameter) and allowed to feed at 25.degree. C. for 48 hours; and insecticidal rate was calculated.
B. Insecticidal test on larvae of Plutella xylostella
Cabbage leaves (5.times.5 cm) were soaked in the test solution and dried in air. Ten larvae (3 instar) of Plutella xylostella were put on the cabbage leaf in a Petri dish (9 cm in diameter) and allowed to feed at 25.degree. C. for 48 hours; and insecticidal rate was calculated.
C. Insecticidal test on larvae of Adoxophyes orana
Tea leaves (whole leaves) were soaked in the test solution and dried in air. The three tea leaves were placed on a polyethylene cup (6 cm in diameter, 4 cm in depth). Ten larvae (4 instar) of Adoxophyes orana were put on the leaf in the cup and kept at 25.degree. C. for 48 hours; and insecticidal rate was calculated.
D. Insecticidal test on susceptible adults of Nephotettix cincticeps
Stem of six to seven rice seedlings (1.5.about.2 leaves) were bundled up with a sponge tape, which was fixed in a polyethylene cup (6 cm in diameter, 4 cm in depth) containing a small amount of water.
Test solution (2 ml) was applied to the foliage of the plants in a rotary sprayer and the bunch was dried in air, and it was covered with a transparent plastic cylinder. Ten female adults to Nephotettix cincticeps were confined in the cylinder and allowed to feed at 25.degree. C. for 48 hours. Then, insecticidal rate was calculated.
I. Insecticical test on susceptible larvae of Myzus persicae
J. Insecticidal test on resistant larvae of Myzus persicae
A leaf (3.times.3 cm) of a chinese cabbage was placed on a polyethylene cup (6 cm in diameter, 4 cm in depth) filled with 0.3% agar-gel. One apterous adult of Myzus persicae was put on the leaf and allowed to keep at 25.degree. C. for 24 hours to make larviposition. After removal of the adult, 2 ml of the test solution was applied to the foliage under a rotary sprayer; and larvae of Myzus persicae were allowed to keep at 25.degree. C. for 48 hours. Then insecticidal rate was calculated.
K. Miticidal test on adults of Tetranychus cinnabarinus
N. Miticidal test on adults Tetranychus urticae
A leaf (2 cm in diameter) of kidney beans was placed on a polyethylene cup (6 cm in diameter, 4 cm in depth) filled with 0.3% agar-gel. Twelve female adults were put on the leaf and allowed to keep at 25.degree. C. for 24 hours. After removal of dead and unhealthy individuals, 2 ml of the test solution was applied to the leaf in a rotary sprayer. The adults were allowed to keep at 25.degree. C. for 48 hours. Then insecticidal rate was calculated.
L. Miticidal test on larvae of Tetranychus cinnabarinus
O. Miticidal test on larvae of Tetranychus urticae
A leaf (2 cm in diameter) of kidney beans was placed on a polyethylene cup (6 cm in diameter, 4 cm in depth) filled with 0.3% agar-gel. Seven female adults were put on the leaf and allowed to keep at 25.degree. C. for 24 hours to make them lay eggs.
After removal of the adults, 2 ml of the test solution was applied to the leaf in a rotary sprayer. The larvae was allowed to keep at 25.degree. C. for 7 days and the number of dead hatched larvae out of all of those were counted; and miticidal rate was calculated.
M. Miticidal test on eggs of Tetranychus cinnabarinus
P. Miticidal test on eggs of Tetranychus urticae
The test was carried out in the same manner as in Tests L and O, the cup was kept at 25.degree. C. for 7 days and the number of dead eggs were counted; and ovicidal rate was calculated.
Q. Insecticidal test on adults of Epilachna vigintioctopunctata
A leaf (6.times.6 cm) of an eggplant was soaked in the test solution and dried in air. Five imagos (per leaf) of Epilachna vigintioctopunctata was put on the leaf in a Petri dish (9 cm in diameter) and allowed to feed at 25.degree. C. for 48 hours. Then insecticidal rate was calculated.
R. Insecticidal test on larvae of Periplaneta americana
A filter paper (9 cm in diameter) was soaked in the test solution in a Petri dish. Five larvae (1.about.7 days after hatching) were confined in the Petri dish and allowed to keep at 25.degree. C. for 48 hours. Then insecticidal rate was calculated.
S. Insecticidal test on adults of Callosobruchus chinensis
Ten adults within 24 hours after adult eclosion was laid in a screw tube (1.8 cm in diameter, 5 cm in height) of which the top and the bottom were covered with stainless steel net. The adults in the screw tube were immersed in the test solution, dried in air, and allowed to keep at 25.degree. C. for 48 hours. Then insecticidal rate was caluculated.
The results were shown in the following Table 3.
TABLE 3
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Comp No.
PPM
A B C D I J K L M N O P Q R S
__________________________________________________________________________
6 2000 87 100
100
4 2000 100 100
100
93
1000 100 100 79 93
250 100 100
63 91 95
16 87 81
1 2000 100 100 100
1000 100
80 100
250 100 100
63 100
22 2000 100 100
100
250 100
97 100
95
63 100
16 96
7 2000 100 100
100
250 96
12 2000 74
17 2000 71
2 2000
100 100 100
90 100
1000
100 100
250 100 100
63 70
5 2000 100 100
1000 77
15 2000
100 100 100 83 100
250 94 97 100
63 100
14 2000
100 100 100
100
83 100
1000
100 95 100 100 100
250
70 75 81 100 100 100
63 100 70
16 95
23 2000
100 100 100
100 100
1000 100
250 100 100
100 97 70
63 100 100
70
16 87
20 2000
100 100 100
250
70 100 100
63 100 95
10 2000 100 100
18 2000
100 100 100
90 100
250 100
63 100
16 95
25 2000
100 100 100 100 100
1000 100 100
250
100
75 100 100 97 100 100
63 100 100
100
82 100 100
16 100
4 100
1 89
11 2000
100 75 100 100
100 100
250 90 100 100 71
63 100 100
16 100
19 2000
100 100 100
100
82 100
1000 100
250 85 100 100
90 100 100
63 100 100
90 100
16 100
9 2000
100 100 100
80 100
250 70 100 100 100 100
63 100 100 92
16 70 95
16 2000
100 100 100
100
70 100
250 70 100 100
100 100 100
63 100 100 100 80
16 85 100
4 71
24 2000
100 70 100 100
100 100
1000 100
250 100 100
100 100 100
63 100 100
90 86 70
16 100
8 2000 81 100 100
100
250 100
3 2000 100 100
1000 100 97
13 2000 100 100
1000 100
21 2000 100
67 1000 100 86
250 90
32 1000 100 76
250 75
35 1000
100 100 100 100 100
100
250
75
85 100 100 100 100
100
100
73 91
63 100
100
94 100
80 96
16 100
100
74 98
1 100
42 1000
100 100 100
100 100
100
250 70 100
82 100 74 84
63 100 100 100
16 94 75
26 1000
75 95 100
95 100
100
250 100 100 97 97
63 73 100 100
16 80
37 1000
95 73 100
90
73 70
100
250 80 100 100 100
63 100
90 90
16 100
45 1000
100 100 100
100
250 85 100 100
63 76 88
44 1000
100 100 100
100
81 100
100
250 80 100 97
63 100 100
16 89 95
34 1000 100 100
100 100
91
250 100 94
63 100 81
33 1000
70 100 100
100 100
90
250 100 100 97 86
63 95 100 76
16 91
36 1000
100 100
100 100 100 100
100
250
85
95 90 100
100
100 100
100
100 88
63 90 100 100 100
100
100 100
87
16 100
100
79 100
100 86
1 100
43 1000
100 100 100
100
83 100
100
250 100 100
83 100 100 92
63 100 100
100 85 93
16 100 92
1 74
41 1000
95 100
100 100
100
250 100 100 100
63 100 100
16 94 95
47 1000
100 100 100
100
94 100
100
250
100 70 100
72 100 100
100
100 100 100
63 75 100 100 100
100
80 100
100
100
16 100
100
91 92 86
46 1000
95 71 100
100 100
100
250
85 100
100
91 100 80 100
63 70 100
100 85 100
95
16 100 87
48 1000
100 100
100 100
100
250
85 100 100
63 100
16 88
49 1000 79
50 1000
100 82 97
100
98 100
100
250
75 100
100
99 100
100 100 100
63 100
100
83 100 80
90
94
16 100
90 88
4 89
54 1000
100 100 100
100 80
100
250 78 100 85 100 96
63 81 97
90 86
16 70 86
51 1000
100 100 100
100
92 100
100
250 100
79 100 100 100 100
63 100 100
100 80
100
100
16 100 100
100
52 1000 92
250 100
63 89
55 1000
100 100 100
100
86 100
100
250
85 70 100 100 100 100 100
63 100 100
100
72 87 100
100
100
16 97 100
56 1000
95 100 100
100 100
100
250 100 100 100 100
63 100 100 100
16 85 100
57 1000 100
90
39 1000
100 100
100 90
100
250
80 100
100 100
100 100
63 100
100 91 100
16 86
40 1000
100 100 100
100
89 100
100
250
70 100 100
100
87 100
100 100
63 100
100 100
100 100
16 100
100 100 100
4 100
1 83
61 1000
100 97 100
100 100
100
250
95
90
63 80 100
95
16 100
47 1000
100 100 100
100
77 100
100
250
100
100
95 100 70
80
63 75
100 100
100
16 70 100
59 1000
100 100 100
100
98 100
100
250
100
100 97 90
63 100 100
100 70
16 100
95
4 100
60 1000
100 86 100
100
96 100
100
250
100
100 100
63 70 100
100 100
16 100
100
4 100
62 1000
100 100 100
100 100
100
250
80 79
63 100
16 95
64 1000
100 100
100
97 100
100
250
100
80 100 100 100
100
100 90
63 75 100
100
91 100 80
16 100 72
4 100
63 1000 75 100 100 100
100
250 100 100 100
100
100 100
63 88 100
100
99 100
100 90
100
16 100
100 100 70
4 100
66 1000
100 100
100 90
250 100
100 100
63 100
80
65 1000
100 92 100
100 100
100
250
75
95 80 100 100
100
70 70
63 80 100
100 78
16 100
100
__________________________________________________________________________
(Note)
A, B, C, D, I, J, K, L, M, N, O, P, Q, R, and S represent the effects on
insects or mites as described below.
A: Spodoptera litura (larvae)
B: Plutella xylostella (larvae)
C: Adoxophyes orana (larvae)
D: Nephotettix cincticeps (adults)
I: Myzus persicae (susceptible larvae)
J: Myzus persicae (resistant larvae)
K: Tetranychus cinnabarinus (adults)
L: Tetranychus cinnabarinus (larvae)
M: Tetranychus cinnabarinus (eggs)
N: Tetranychus urticae (adults)
O: Tetranychus urticae (larvae)
P: Tetranychus urticae (eggs)
Q: Epilachna vigintioctopunctata (adults)
R: Periplaneta americana (larvae)
S: Callosobruchus chinensis (adults)
The number means lethal rate (%).
As the result of the tests, it is found that the compounds of the present invention show potent effects on various kinds of harmful insects and mites, in particular Tetranychus cinnabarinus and Myzus persicae injurious to crop plants.
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