Drug – bio-affecting and body treating compositions – Preparations characterized by special physical form – Biocides; animal or insect repellents or attractants
Patent
1996-02-09
1998-03-03
Levy, Neil S.
Drug, bio-affecting and body treating compositions
Preparations characterized by special physical form
Biocides; animal or insect repellents or attractants
424409, 424417, 424421, 514352, A01N 2512
Patent
active
057231419
DESCRIPTION:
BRIEF SUMMARY
TECHNICAL FIELD
The present invention relates to a pesticidal composition containing 3-chloro-N-(3-chloro-5-trifluoromethyl-2-pyridyl)-.alpha.,.alpha.,.alpha.- trifluoro-2,6-dinitro-p-toluidine (hereinafter referred to as fluazinam) as the fungicidal active component. More particularly, it relates to N-pyridyltoluidine-containing fungicidal water dispersible granules having the color change suppressed without reducing dispersibility and suspensibility in water.
BACKGROUND ART
Fluazinam is an active ingredient of an agricultural or horticultural fungicide, and a wettable powder or a suspension concentrate may, for example, be mentioned as its formulation to be diluted with water and sprayed.
Generally, a powder formulation such as a wettable powder has a problem of dusting at the time of weighing or preparation into an application form, and a liquid formulation such as a suspension concentrate has a problem in the treatment of a polluted bottle after use. As one of the disposal to solve such problems, an attempt has been made in recent years to granulate the wettable powder.
However, when it is attempted to granulate a wettable powder containing fluazinam, there have been problems such that the dispersibility and suspensibility in water decreases, and the product undergoes a color change. If the dispersibility or suspensibility in water decreases, uniform application tends to be difficult, and a spray nozzle is likely to be clogged. Consequently, the fungicidal activity tends to be low or no-uniform, such being undesirable. With the one which undergoes a substantial color change with time, there may be some chemical change in the fungicidal active component or its adjuvants, and some times its commercial value tends to be low. Therefore, such a product may sometimes be hardly acceptable as a pesticidal commercial product.
DISCLOSURE OF INVENTION
It is an object of the present invention to provide N-pyridyltoluidine-containing fungicidal water dispersible granules, as a pesticidal composition containing fluazinam as an active ingredient, which has the color change suppressed without reducing the dispersibility and suspensibility in water.
The present inventors have prepared N-pyridyltoluidine-containing fungicidal water dispersible granules containing various components and examined dispersibility and suspensibility in water after durability tests and as a result, they have unexpectedly found that there is a certain relation between the acidity of the water dispersible granules and the dispersibility and suspensibility in water. Further, it has been found that the color change of the product can be suppressed by adjusting N-pyridyltoluidine-containing fungicidal water dispersible granules so that when they are suspended in water, they have acescence. The present invention has been accomplished on the basis of these discoveries.
Thus, the present invention provides N-pyridyltoluidine-containing fungicidal water dispersible granules, which comprises fluazinam as a fungicidal active component, a surfactant and a carrier, and of which a 1% water suspension is acescent, that is slightly acidic.
The fungicidal active component of the above water dispersible granules may contain fluazinam alone, or may contain in addition to fluazinam, another fungicidal active ingredient which does not adversely affect the dispersibility and suspensibility in water. Such another fungicidal active ingredient may, for example, be 1-(2-cyano-2-methoxyiminoacetyl)-3-ethylurea (hereinafter referred to as cymoxanil), tetrachloroisophthalonitrile (hereinafter referred to as chlorothalonil), dimethyl 4,4'-(o-phenylene)bis(3-thioallophanate) (hereinafter referred to as thiophanate-methyl), (hereinafter referred to as dimethomorph), (RS)-3-(3,5-dichlorophenyl)-5-methyl-5-vinyl-1,3-oxazolidine-2,4-dione (hereinafter referred to as vinclozolin), 3-(3,5-dichlorophenyl)-N-isopropyl-2,4-dioxoimidazolidine-1-carboxamide (hereinafter referred to as iprodione), N-(3,5-dichlorophenyl)-1,2-dimethylcyclopropane-1,2-dicarboximide (hereinafter re
Ikeda Kazutaka
Kimura Tokiya
Shindo Takeshi
Ishihara Sangyo Kaisha Ltd.
Levy Neil S.
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