Method of controlling soil insects with phenylpyrazoles

Abstract

The invention concerns insecticide compositions comprising: a) between 0.001 and 5 %, preferable between 0.05 and 1% of a compound of the type 1-phenyl pyrazole, in particular 1-[2,6-Cl 2 4-CF 3 phenyl]3-CN4[SO—CF 3 ]5-NH 2 pyrazole ; and b) between 0.05 and 10%, preferably between 0.1 and 5% of one (or several) moisture retaining agent of the organic type; and c) between 40 and 99%, preferably between 50 and 98% (and more preferably between 70 and 97%) of vegetable flour. The invention also concerns a method for fighting insects using said composition, in particular against click beetles.

1 . Insecticidal compositions comprising: 
 a) between 0.001 and 5%, preferably between 0.05 and 1% and still more advantageously between 0.05 and 0.5% of a compound of formula (I):                          in which: 
 R 1  is a halogen atom or a CN group or a methyl group or a CH 3 CO group;  
 R 2  is S(O) n R 3 ;  
 R 3  is alkyl or haloalkyl;  
 R 4  represents a hydrogen or halogen atom, or an NR 5 R 6 , S(O) m R 7 , C(O)R 7  or C(O)O—R 7 , alkyl, haloalkyl or OR 8  radical or an —N═C(R 9 ) (R 10 ) radical;  
 R 5  and R 6  independently represent a hydrogen atom or an alkyl, haloalkyl, C(O)alkyl or S(O) r CF 3  radical, or R 5  and R 6  can together form a divalent alkylene radical which may be interrupted by one or two divalent heteroatoms such as oxygen or sulphur;  
 R 7  represents an alkyl or haloalkyl radical;  
 R 8  represents an alkyl or haloalkyl radical or a hydrogen atom;  
 R 9  represents an alkyl radical or a hydrogen atom;  
 R 10  represents a phenyl or heteroaryl group optionally substituted with one or more halogen atoms or groups such as OH, —O-alkyl, —S-alkyl, cyano or alkyl;  
 R 11  and R 12  represent, independently of each other, a hydrogen or halogen atom;  
 R 13  represents a halogen atom or a haloalkyl, haloalkoxy, S(O) q CF 3  or SF 5  group;  
 m, n, q, r represent, independently of each other, an integer equal to 0, 1 or 2;  
 with the proviso that when R 1  is methyl, then R 3  is haloalkyl, R 4  is NH 2 , R 11  is Cl, R 13  is CF 3  and X is N;  
   b) between 0.05 and 10%, preferably between 0.1 and 5% of one (or more) moisture-retaining agents, preferably a moisture-retaining agent of an organic nature; and    c) between 40 and 99%, preferably between 50 and 98% (and more preferably between 70 and 97%) of vegetable meal.    
     
     
         2 . Insecticidal compositions according to  claim 1 , characterized in that the meals are derived from the grinding of cereal grains such as wheat, barley, rye, triticale, oats, or also rice, sorghum, soyabean, maize.  
     
     
         3 . Insecticidal compositions according to either of claims  1  and  2 , characterized in that the meal is a maize meal.  
     
     
         4 . Insecticidal compositions according to one of  claims 1  to  3 , characterized in that among the moisture-retaining agents of an organic nature, there may be mentioned macromolecular hydrophilic derivatives of plant origin, and in particular cellulosic hydrophilic derivatives, and more particularly cellulose.  
     
     
         5 . Insecticidal compositions according to one of  claims 1  to  4 , characterized in that the composition also comprises from 3 to 30%, preferably from 4 to 20% of sugars.  
     
     
         6 . Insecticidal compositions according to one of  claims 1  to  4 , characterized in that the sugars are chosen in particular from mono-, oligo- or polyorganosaccharides, especially from sucrose, lactose, fructose, dextrose, glucose or alternatively molasses or honey.  
     
     
         7 . Insecticidal compositions according to one of  claims 1  to  6 , characterized in that they also comprise a preservative preventing the degradation of the meals, chosen from sodium benzoate, 1,2-benzisothiazolin-3-one, benzoic acid, para-hydroxybenzoic acid and its ester derivatives and its alkali or alkaline-earth metal salts, in particular the sodium salt, 2-phenylphenol and its alkali or alkaline-earth metal salts, in particular the sodium salt, para-nitrophenol.  
     
     
         8 . Insecticidal compositions according to one of  claims 1  to  7 , characterized in that they comprise other additives such as colourings or attractants for pests or repellants for birds or animals which are useful or which should be protected, and/or other formulation additives such as binding, agglomerating, appetite-enhancing, agglutinating, gelling, swelling and antiadherent agents and the like.  
     
     
         9 . Insecticidal compositions according to one of  claims 1  to  8 , characterized in that the compound of formula (I) is 5-amino-3-cyano-1-[2,6-di-chloro-4-(trifluoromethyl)phenyl]-4-[(trifluoromethyl)-sulphinyl]-1H-pyrazole.  
     
     
         10 . Insecticidal compositions according to one of  claims 1  to  9 , characterized in that the formulations according to the invention are in the form of granules, the size of these granules being advantageously between 0.1 mm and 3 cm, preferably between 0.5 and 4 mm and in that these granules are advantageously insoluble in water.  
     
     
         11 . Method of controlling insects, characterized in that an effective quantity of a composition according to one of  claims 1  to  10  in the form of granules having a size of between 0.2 mm and 2 cm is applied over or into the soil (preferably into the soil) of the area which has to be cultivated.  
     
     
         12 . Method of protecting crops according to  claim 11 , characterized in that a compound of formula I is used.  
     
     
         13 . Method according to either of claims  11  and  12 , characterized in that cereal, preferably maize or beet or sunflower or potato or rape, crops are protected.  
     
     
         14 . Method according to one of  claims 11  to  13 , characterized in that an effective quantity of one of the compositions according to the invention is used for controlling insects, especially click beetles.  
     
     
         15 . Method according to one of  claims 12  to  14 , characterized in that the effective quantity of composition corresponds to a dose of compound of formula (I) of between 1 and 50 g/ha, preferably between 3 and 40 g/ha.  
     
     
         16 . Method of controlling insects which consists in the application, over or into the soil, of a composition providing a dose which is nonlethal through contact but lethal through ingestion.  
     
     
         17 . Method according to  claim 16 , applicable to click beetles.