PL112622B1 - Fungicide - Google Patents

Description

Patent description published: 15/01/1982 112622 READING ROOM of the Patent Office hlaiij l2tczrp«itiii'it Luaimj IntCl.'A01N9/02 Inventor: —. Patent holder: Lilly Industries Limited, London (Great Britain) Fungicide [The subject of the invention is a fungicide for the protection of crops against fungal infection. The fungicide according to the invention contains active substances in combination with one or more inert and non-phytotoxic carriers. The agent contains as one fungicidally active substance a triazine derivative of formula 1, and as a second fungicidally active substance it contains benzimidazole of formula 2. Both compounds mentioned are known and can be obtained by methods described in detail in the literature. The specific combination of active substances included in the composition according to the invention is new and has been found to be surprisingly effective in limiting or combating fungal infections of crops. The agent containing as an active substance a compound of formula 1 and a compound of formula 2 has been found to be particularly effective in combating cereal diseases such as powdery mildew, root rot and other leaf and ear diseases attacking cereal plants at the ripening stage. The agent according to the invention is used against fungal infections on plants, especially grain and vines, in a fungicidally effective amount. The agent is preferably applied to the leaves at any time, from germination of the plant to harvest. The amount and frequency of application of the agent depend on the detected or expected degree of fungal infection of the plants. However, the feature of the agent according to the invention is that it works particularly well with a limited frequency of use. For example, in order to control mold infections in grapevines, the agent is effectively used only once every 2-3 weeks, which reduces labor costs. The ingredients of the agent according to the invention can be applied to the plants successively or simultaneously, but it is more recommended to use them together. The compound of the formula 1 is preferably used in an amount of 10-500 g/ha. The compounds of the formula 2 are preferably used in an amount of 100-500 g/ha. 3000 g/ha. Thus, the weight ratio of the compounds of formula 1 to the compounds of formula 2 contained in the composition ranges from 5:1 to 1:300. The preferred weight ratio of the compound of formula 1 to the compound of formula 2 is 2:1 to 1:25. In order to simplify production, storage and transportation, the agent is usually prepared in the form of a concentrate intended for dilution with water to an extent that allows for easy use of the previously discussed doses of active substances. Such concentrates may contain 0.5-90%, preferably 5-90%, by weight of active substances in combination with one or more neutral, non-phytotoxic carriers. Such a composition is usually in the form of a wettable powder, dust or aqueous suspension, although it should be emphasized that aqueous suspensions are unstable because they have a relatively short half-life (approximately 100 days) in an aqueous environment. The product in the form of concentrates is intended to be diluted with water before use. Aqueous suspensions are prepared from concentrates in ordinary tanks suitable for this purpose. Wettable powders or dusts contain thoroughly mixed active substances and one or more inert carriers as well as suitable surfactants. The inert carrier may be selected from attapulgite clays, montmorillonite clays, diatomaceous earths, kaolins, micas, talcs and purified silicates. Suitable surfactants are selected from sulfonated lignins, naphthalene sulfonates and condensed naphthalene sulfonates, alkyl succinates, alkylbenzene sulfonates, alkyl sulfonates and non-ionic surfactants such as ethylene oxide-phenol adducts. Examples of wettable powders according to the invention are preparations with the following composition: Wettable powders % by weight 25 Compound of formula 1 0.25-10 Compound of formula 2 10-80 Surfactant or agents 0-10 Dispersant 0-10 Anti-caking agent 0-10 Inert carrier or carriers up to 100 Aqueous suspensions and solutions contain active substances suspended or dissolved in water or solvents, respectively, and any surfactants, thickeners, antifreezes or preservatives. Suitable surfactants may be selected from those mentioned above for wettable powders. Thickening agents, if used, are selected from suitable cellulosic materials and natural resins. Glycol is usually used as an antifreeze when needed. Preservatives can be selected from a wide variety of substances of this type, such as various paraben antibacterial substances, phenol, O-chlorocresol, phenylmercury nitrate and formaldehyde. Typical aqueous suspensions according to the invention are preparations with the following composition: are the following examples: In the examples, the compound of formula 1 is marked with the letter symbol "CTDB" and the compound of formula 2 with the symbol "MBC". Example I. A wetted powder with the following composition was prepared: CTDB MBC Sodium salt of condensed naphthalenesulfonic acids Sodium tridecylsulfonate Silica Kaolin acids % by weight 12.0 60.0 5.0 2.0 5.0 to 100.0 The active substances were carefully mixed with appropriate excipients in a standard mixer. The mixture was ground hydraulically in a mill to a grain size of 1-10 microns and the composition was adjusted. mixture and deaerated it by packaging, Example II. An aqueous suspension was prepared with the following composition: weight % 2.5 50.0 3.0 3.0 5.0 0.2 to 100.0 CTDB MBC Sodium lauryl sulfonate Bentonite Ethylene glycol Formaldehyde Water Both active ingredients ground in the usual manner. if necessary, they were dispersed in water containing surfactants, preservatives and part of the thickener. The particle size of both active substances was further reduced by grinding the liquid and the remaining amount of thickener was added. The suspension was allowed to hydrate and the product was diluted with water to the appropriate volume. PL PL PL

Claims (2)

1. Patent claims Compound 0 formula 1 Compound 0 formula 2 Surfactant or agents 4 Thickener ^ Antifreeze Preservative Antifoam Water % by weight 0.1—8 20^52 0—15 0—3 0—20 0- ^1 0-0.5 to 100 55 60 1. A fungicide containing active substances and one or more inert, non-phytotoxic carriers, characterized in that one of the active fungicidal substances is a triazine derivative of the formula I. the second fungicidally active substance contains benzimidazole of formula 2. 2. The agent according to claim 1, characterized in that it contains 0.5-90% by weight of active substances. 112 622 Cl N—n ^^0-CH-CO-C (CH3)3 MzOr N NT H o ^ C-NH-C-OCH3 Ncór 2 PL PL PL