Use of riboflavin and flavin derivatives as chitinase inhibitors

Abstract

The invention relates to the use of riboflavin and of flavin derivatives with chitinase-inhibitory action for controlling arthropods, nematodes and chitin-containing fungi.

1 . The use of flavin derivatives of the formula (I)  
       
         
           
           
               
               
           
         
         in which  
         R 1  is hydrogen, trifluoromethyl, alkyl or alkoxy,  
         R 2  is hydrogen, halogen, preferably chlorine, nitro, alkyl, alkoxy, dialkylamino, preferably dimethylamino, —CH 2 COOH or the radical NHCH 2 CH(OH)CH(OH)CH(OH)CH 2 OH,  
         R 3  is hydrogen, CH 2 CH 2 CH(OH)CH(OH)CH 2 OH, CH 2 CH(OH)CH(OH)CH(OH)CH 2 OH, phenyl, —CH 2 CHO, —CH 2 CH 2 OH, CH 2 CH(OH)CH(OH)CH(OH)CH(OH)CH 3  or CH 2 CH(OH)CH(OH)CH(OH)CH 2 OPO 3 ,  
         R 4  is hydrogen or alkyl  
         and of their stereoisomers and salts for controlling pests.  
       
     
     
         2 . The use of compounds of the formula (I) and of their stereoisomers and salts according to  claim 1 , characterized in that 
 R 1  is methyl    R 2  is methyl, dimethylamino, or NHCH 2 CH(OH)CH(OH)CH(OH)CH 2 OH    R 3  is CH 2 CH 2 CH(OH)CH(OH)CH 2 OH or CH 2 CH(OH)CH(OH)CH(OH)CH 2 OH and    R 4  is hydrogen.    
     
     
         3 . A pesticide comprising at least one compound of the formula (I) according to  claim 1 .  
     
     
         4 . A pesticide comprising a combination of at least one compound of the formula (I) according to  claim 1  with pesticides from the class of the pyrethroids, pyrazoles, neonicotinoids, avermectins, spinosyns or other classes of active compounds with an active adulticidal or non-development-inhibitory potential.  
     
     
         5 . A method for controlling pests, characterized in that at least one compound of the formula (I) according to  claim 1  or a pesticide according to  claim 3  or  4  is allowed to act on the pests and/or their environment.  
     
     
         6 . A process for the preparation of pesticides, characterized in that compounds of the formula (I) according to  claim 1  are mixed with suitable auxiliaries.  
     
     
         7 . A method as claimed in  claim 6 , wherein extenders and/or surface-active agents are employed as auxiliaries.