IL29079A - Fungicidal compositions containing 2,6-dichloro-3,5-dicyano-4-phenyl-pyridine and n-polychloroalkyl(thio)-phthalimide derivatives - Google Patents

Description

Fungicidal Compositions Containing Derivativea The present invention is concerned with fungicidal We have found that extremely active fungicides can be obtained by mixing or phthalimide with pyridine or a derivative thereof in whioh the phenyl group is substituted with a nitro The resulting mixture has a more marked fungicidal action than would be expected from a simple addition of the activities of the wo constituents or from an equal quantity of either constituent German Patent fungicides the phenyl group of which if be substituted by a nitrp are described and it is stated that these fungicides oan be used in oombinatioft with but there is no disclosure or suggestion in this patent of a fungicidal effect between the group of if be substituted by a nitrp and the said ed phthalimide or tetrahydrophthalimideso ooording to present invention we provide a fungicidal composition in which the active component is a mixture from 5 to 9 by weight of phthalimide and and from 95 to of the phenyl substituent is The unusual activity of the fungioide according to the invention can be shown by a spore germination test wit an causing apple the test shows the quantity of active principle needed to inhibit of the germination of oonidia from th s The dose was found in of active or mixture of active principles per 100 square centimetres of area tested The oo pounds under test are dissolved acetone and spread over inert After solvent has suspensions of for germination on the dried coatingSo the following average for the lethal doses for Mixture of A 12 Mixture of A XI Corresponding results are when or as component in the spore germination test with the fungus Botrytis the following tot the 95 ft lethal dose were phthalimidc i 2 pyridine Mixture 20 ft A 80 ft B Mixture 80 ft A 20 ft B pyridine Mixture 20 ft C 80 ft B Mixture 80 ft C 20 ft B tetrahydrophthalimide 2 pyridine Mixture 20 ft D 80 ft B Mixture 80 D 20 ft B In addition to its synergistic the mixture according to the invention has a considerably increased s a great advantage in Particularly good results are obtained if the uted pyridine is mixed with the phthalimide or tetrahydrophthalimide in the weight proportions of from to The fungicidal compositions according to the invention normally contain from 1 to by weight of the aotive the synergistic and it is preferred that the compositions should contain from 30 to 0 advantageously of the active In the particularly good results have been obtained with formulations containing of active this being made up of or and or respectivel For the fungicidal composition is preferably diluted to an ultimate concentration of to advantageously by weight of active The phthalimide and phthali ides are known see for German Patent and Belgian Patent German Patent contains information about the production of substituted and the compounds whose preparation is described include and in addition to The fungicides according to the invention can be presented in forms suitable for all normal Conventional carriers fillers can be used to give compositions suitable for spraying or dusting which further suoh as dispersants or wetting Carriers can also be used to give solutions or emulsions which can be for example by the aerosol The most suitable solvents are such as or mixtures of two or more of The fungicidal compositions according to the invention are suitable for use in agriculture particularly vine and fruit They are particularly valuable because of their strong activity over a large area and their permanent The following in which all percentages are by are given by way of illustration onl Example 1 Powder for spraying 1 sulphite powder dialkyl naphthalene sulphonate bole These substances are ground together to form an intimate The powder thus produced can be sprayed as a dilute aqueous Example 2 Powde spraying 2 acid These substances are ground to the required degree of They are diluted with water to give a suitable for Example Adhesive dust silicic acid magnesium ohloride carboxymethyl oellulose talo These substances are carefully mixed or ground together and used as a Dispersion concentrate nonyl phenol polyglycol ether carboxymethyl cellulose silicic acid de ineralised These substances are mixed Before concentrate is diluted with A mixture is obtained which oan be used as a Powder for spraying pyridine Sulphite powder lna hthalene sul honate These substances are intimately mixed A powder is obtained which can be sprayed the form a dilute aqueous Example 6 Powder for spraying sulphite powder dialkylnaphthalene sulphonate bole These substances are mixed For the powder is diluted to form an spraying Example spraying acid tauride bole These substances are mixed together to form fine By h water before an emulsion is obtained is suitable for spraying or Example Powder for spraying sulphite lye powder dialkylnaphthalene sulphonate bole These substances are mixed By tion with insufficientOCRQuality

Claims (1)

1. What we olaim Λ fungicidal composition in which the active component is a mixture of from 5 to 95 by weight of or and from 95 to 5 by weight optionally substituted in the phenyl nucleus by a nitro A fungicidal composition in which the active component is a mixture of from 5 to 95 by weight of and from 95 to 5 by weight of pyridine A fungicidal composition acoording to claim in which the active principle is a mixture of from 20 to 65 by weight of said substituted pyridine derivative and from 80 to 35 by weight of said phthalimide A fungicidal composition according to claim i which comprises substantially 40 by weight of the active principle made up of approximately of said phthalimide derivative and of said substituted pyridine A fungicidal composition according to claim i which comprises substantially 40 by weight of the active principle made up of approximately 30 of said phthalimide derivative A fungicidal composition to claim i which comprises a mixture of from 20 to 65 fa by weight of and from 80 to 35 weight of A fungicidal composition according to claim i which comprises a mixture of from 20 to 65 toy weight of and from 80 35 by weight of A fungicidal composition according to claim i which comprises a mixture of from 20 to 65 by weight and from 80 to 35 weight of hydrophthalimide A fungicidal composition according to claim i which comprises substantially 40 by weight of the active principle made up of approximately of and 25 of 3 A fungicidal composition according to claim i which comprises substantially 40 by weight of the active principle made up of approximately 30 of and of A fungicidal composition according to claim i wherein said substituted pyridine is 3 Λ fungicidal composition aocordin to whoroin said substituted pyridine derivative is 3 Λ fungicidal composition substantially herein described in any of Examples i to A fungicidal composition substantially as herein described in any of Examples 6 to of insufficientOCRQuality