JPH0528682B2 - - Google Patents

Description

[Detailed description of the invention]

The present invention relates to an insecticidal/acaricide composition comprising a mixture of a specific pyritazinone derivative and an active ingredient compound of a known insecticide and/or acaricide. BACKGROUND OF THE INVENTION Today, the development of insecticides and acaricides for the purpose of controlling various pests such as agricultural and horticultural pests, forest pests, and sanitary pests is being widely advanced, and a wide variety of pesticides are in practical use. However, there is a demand for a drug that satisfies all of the following, including toxicity to humans, livestock, and fish, insecticidal/acaricidal spectrum, insecticidal/acaricidal effects, and residual efficacy, but it is difficult to satisfy all of these requirements. The present inventors, while proceeding with studies to develop insecticides and acaricides with superior insecticidal and acaricidal properties compared to these existing drugs, identified a new active insecticide and acaricide. It has been discovered that the insecticidal/acaricidal composition of the present invention, which is a combination of the pyridazinone derivative and the active ingredient compound of an existing insecticide/acaricide, has an excellent synergistic insecticidal effect. In other words, the present invention is based on the formula (): This invention relates to an insecticide/acaricide containing a compound represented by the following as active ingredients and at least one of the compounds represented by the following .

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[Table] The characteristics of the insecticidal/acaricidal composition of the present invention are, firstly, that its insecticidal/acaricidal efficacy is clearly enhanced compared to the case of applying each agent alone, and it is a fast-acting insecticidal agent. - It has acaricidal effect, and secondly, it has a wide insecticidal and acaricidal spectrum that is not found in existing insecticides and/or acaricides, and it has a long residual effect. be. That is, the insecticidal/acaricidal composition of the present invention has a synergistic insecticidal/acaricidal action. This synergistic insecticidal and acaricidal action is based on a synergistic effect that cannot be predicted from the insecticidal and acaricidal properties of each single agent, and the usefulness of the composition of the present invention is due to its reliable control effect against various pests, In other words, it is an excellent insecticidal agent with a long-lasting effect that is not only fast-acting but also has a high residual effect.
It can be said that it is capable of exhibiting acaricidal efficacy. The insecticidal/acaricidal composition of the present invention has excellent insecticidal power against Hemiptera pests such as leafhoppers, Lepidoptera pests such as the diamondback moth, Coleoptera pests, and sanitary pests such as Culex mosquito, and is parasitic on fruit trees and vegetables. It is also effective in controlling various mites, such as the two-spotted spider mite, Kanzawa spider mite, false red spider mite, citrus spider mite, apple spider mite, etc., and mites that parasitic on animals, such as the American spider mite, Bohuillus annullitas, Amblyomma maculatum, Lipicephalus appendiculatus, and the two-legged spider mite. . When applying the insecticidal/acaricidal composition of the present invention, it can generally be applied by mixing with a suitable carrier, and if necessary, emulsifying agents, dispersing agents, suspending agents, penetrating agents, stabilizing agents, etc. It can be put to practical use in any desired dosage form, such as emulsions, wettable powders, flowables, powders, granules, oils, aerosols, etc. by adding additives.
In addition, other types of insecticides, various fungicides,
It is also possible to add herbicides, plant growth regulators, synergists, repellents, fragrances, and the like. The mixing ratio of the pyritazinone compound represented by the above formula () (hereinafter simply referred to as compound A) and the other active ingredient compound of the insecticide and/or acaricide is as follows: Generally the latter is 0.01 to 30 parts by weight, preferably 0.01
~20 parts by weight is good. Next, specific examples of the insecticide/acaricide composition of the present invention will be shown, but of course the invention is not limited to these. All "parts" below indicate parts by weight. Formulation example 1 Emulsion compound A...5 parts DMTP (common name)...20 parts Xylene...60 parts Sorbol 2680...15 parts (mixture of nonionic surfactant and anionic surfactant: Toho Chemical Industry Co., Ltd. product) name) The above ingredients are mixed uniformly to form an emulsion. When using, the above emulsion is diluted 100 to 2000 times and sprayed at 50 to 500 per 10 ares. Formulation example 2 Wettable powder compound A: 2 parts fenbutastin oxide (common name): 10 parts Siegrite PFP (mixture of kaolinite and sericite: Sieglite Industries Co., Ltd. trade name)
…79 parts Solbol 5039 (mixture of nonionic surfactant and anionic surfactant: Toho Chemical Industry Co., Ltd.)
(Product name) ...4 parts Carbrex #80 (white carbon: Shionogi & Co., Ltd. product name) ...3 parts Calcium ligninsulfonate ...2 parts The above ingredients are mixed uniformly in a jet air mill. Grind and use as a hydrating agent. When using, dilute the above hydrating agent 100 to 2000 times and add 50 to 50 per 10 ares.
Spray 500. Formulation example 3 Flowable agent compound A......5 parts Binapacryl (generic name)......20 parts Sorbol 3353 (nonionic surfactant: Toho Chemical Industry Co., Ltd. trade name)......10 parts Lunox 1000c (hydrogen) Ionic surfactant: Toho Chemical Industry Co., Ltd. trade name) 1 part 1% xanthan gum aqueous solution (natural polymer)
20 parts Water 44 parts The above ingredients except the active ingredient were uniformly dissolved, and then the active ingredient was added and stirred thoroughly, followed by wet grinding in a sand mill to obtain a flowable agent. When using, dilute the above flowable agent 100 to 2000 times.
Spray 50-500 per 10 are. Formulation example 4 Grinding compound A...0.5 part Kelsen (generic name)...2 parts Carbrex #80 (white carbon: trade name of Shionogi & Co., Ltd.)...1 part Siegrite D (mixture of kaolinite and sericite: Sieglite) Kogyo Co., Ltd. (trade name)...95 parts Diisopropyl phosphate...1.5 parts The above ingredients are uniformly mixed and pulverized to form a powder. When using, add 1 to 30 kg of the above powder per 10 ares.
Spread. Formulation example 5 Aerosol compound A...0.5 parts DDVP (common name)...5 parts Xylene...5 parts Deodorized kerosene...49.5 parts Mix and dissolve the above ingredients, fill it into an aerosol container, and after attaching the pipe part, pour it through the valve part. 40 parts of propellant (liquefied petroleum gas) is charged under pressure to obtain an aerosol. Next, the fact that the insecticidal and acaricidal composition of the present invention exhibits excellent insecticidal and acaricidal effects will be specifically explained with reference to test examples. Test example 1 Insecticidal effect test against adult Kanzawa spider mites Green bean leaves were punched with a diameter of 1.5cm using a leaf punch.
A circle was cut out and placed on wet filter paper on a styrofoam cup with a diameter of 7 cm. This was inoculated with 10 female adult Kanzawa spider mites per leaf. Half a day after inoculation, the composition of the present invention and the control single agent were dispersed in water and diluted to a predetermined concentration, and 2 ml of the drug solution was sprayed per styrene cup using a rotary spray tower and stored in a constant temperature room with lighting at 25°C. The insect mortality rate after 72 hours was calculated using the following formula. Mortality rate (%) = Mortality rate/Number of insects released x 100 The LC ₅₀ value was determined from this data on the mortality rate.
Furthermore, the Sun and Johnson method, which is commonly used to determine the degree of synergistic effect (J.Econ.Ent.), Vol. 53, p. 887 (1960) )] was used to determine the synergistic effect. Control single agent LC ₅₀
The values are shown in Table 1, and the LC ₅₀ values and synergy coefficients of the compositions of the invention are shown in Table 2. Note that the synergistic coefficient is expressed by the following formula. (Based on the Sun and Johnson method) Synergy coefficient = Actual toxicity index of mixture / Theoretical toxicity index of mixture x 100 The greater this value is than 100, the stronger the synergism 100
When it is equal to , there is an additive effect, and when it is less than 100, there is an antagonistic effect. Test Example 2 Pot test against Kanzawa spider mites Tea was planted in pots with a diameter of 20 cm to breed Kanzawa spider mites. Immediately before spraying, the number of Kanzawa spider mite parasites infesting each tea plant was investigated, and the composition of the present invention and the control single agent were dispersed in water to adjust to a predetermined concentration, and the chemical solution was applied to the leaves of the tea leaves in the pots. was dispersed. After air-drying, the pots were stored in a greenhouse, and the number of Kanzawa spider mite parasites infesting each tea plant was investigated on the 5th, 10th, 20th, and 30th day after spraying. The results are shown in Table 3. In addition, the index was calculated as follows. Parasitic index = Number of parasitic female adults after spraying / Number of parasitic female adults before spraying × 100 Test example 3 Pot test against orange spider mites Citrus oranges were planted in pots with a diameter of 20 cm, and orange spider mites were bred. Immediately before spraying, the number of citrus spider mite parasites infesting each tangerine was investigated, the composition of the present invention and the control single agent were dispersed in water, adjusted to a predetermined concentration, and the chemical solution was applied to the hus of the tangerine in the pot. Sprayed on the leaves. After air-drying, the pots were stored in a greenhouse, and the number of tangerine spider mite parasites infesting each tangerine was investigated on the 5th, 10th, 20th, 30th, 40th, and 50th day after spraying. did. The results are shown in Table 4. In addition, the index was calculated as follows. Parasitic index = Number of parasitic female adults after spraying / Number of parasitic female adults before spraying x 100 Test Example 4 Insecticidal efficacy test against green peach aphid Cabbage was planted in a 1/10000 are pot to allow green peach aphid to flourish. The insecticide/acaricide composition of the present invention and a single control agent were dispersed in water and adjusted to a predetermined concentration, and the chemical solution was sprayed on the cabbage leaves in the pot. After air-drying, the pots were stored, and the number of green peach aphids parasitizing each cabbage was investigated three days after spraying. The results are shown in Table 5.

[Table] LC ₅₀ value is the concentration that kills half of the ticks.

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[Table] Note that 5 days after spraying is excluded from calculation.

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Claims (1)

[Claims] 1 Formula (): An insecticide/acaricide containing a compound represented by and at least one of the compounds represented by ~ below as active ingredients.