Insecticide compositions

Abstract

Insecticide compositions which comprise one or not less than two kinds of compounds being selected from a compound represented by the formula [I]: or a salt thereof, and a neonicotinoid compound represented by the formula [II]: The insecticide compositions can produce higher insecticidal effects than would be expected when each of the active ingredients is used singly, namely a synergistic effect, thus enabling reductions in the rate or number of application of agrochemicals and pesticides to be realized.

1 . An insecticide composition which comprises imidacloprid and at least one compound selected from compounds of the formula [I]: 
       
         
           
           
               
               
           
         
         wherein R 1 , R 2 , R 3  and R 4  are the same or different, and each represent a hydrogen atom, a C 1-6  alkyl group, a C 1-6  haloalkyl group or a halogen atom; R 5  is a hydrogen atom or a C 1-6  alkyl group; X is CH or N; n is 0 to 3, or a salt thereof. 
       
     
     
         2 . The insecticide composition as claimed in  claim 1 , wherein the compound of the formula [I] is a compound of the formula [Ia]: 
       
         
           
           
               
               
           
         
         wherein R 1 , R 2 , R 3 , R 4 , R 5  and X are as defined in  claim 1 . 
       
     
     
         3 . The insecticide composition as claimed in  claim 2 , wherein in the compound of the formula [Ia], R 1  is a halogen atom or a C 1-6  haloalkyl group, R 2  is a halogen atom, R 3  and R 5  each are a C 1-6  alkyl group, R 4  is a hydrogen or halogen atom, and X is N. 
     
     
         4 . The insecticide composition as claimed in  claim 2 , wherein in the compound of the formula [Ia], R 1  is a chlorine or bromine atom, or a trifluoromethyl group, R 2  is a chlorine atom, R 3  is a methyl group, R 5  is an isopropyl group, R 4  is a hydrogen or chlorine atom, and X is N. 
     
     
         5 . The insecticide composition as claimed in  claim 2 , wherein the compound of the formula [Ia] is selected from the group consisting of:
 2-[1-(3-chloropyridin-2-yl)-3-trifluoromethylpyrazol-5-ylcarbonylamino]-N-isopropyl-3-methylbenzamide,   5-chloro-2-[1-(3-chloropyridin-2-yl)-3-trifluoromethyl-pyrazol-5-ylcarbonylamino]-N-isopropyl-3-methylbenzamide,   2-[1-(3-chloropyridin-2-yl)-3-chloropyrazol-5-ylcarbonylamino]-N-isopropyl-3-methylbenzamide,   5-chloro-2-[1-(3-chloropyridin-2-yl)-3-chloropyrazol-5-ylcarbonylamino]-N-isopropyl-3-methylbenzamide,   2-[3-bromo-1-(3-chloropyridin-2-yl)-pyrazol-5-yl-carbonylamino]-N-isopropyl-3-methylbenzamide, and   2-[3-bromo-1-(3-chloropyridin-2-yl)-pyrazol-5-ylcarbonylamino]-5-chloro-N-isopropyl-3-methylbenzamide.   
     
     
         6 - 7 . (canceled) 
     
     
         8 . A method for controlling an insect pest, which comprises applying the insecticide composition as claimed in any one of  claim 1 ,  2 ,  3 ,  4  or  5  to locations other than the site where the insect pest inflicts injuries directly. 
     
     
         9 . A method for controlling an insect pest, comprising mixing imidacloprid and at least one compound of the formula [I] or a salt thereof as claimed in any one of  claim 1 ,  2 ,  3 ,  4  or  5 , followed by drenching onto a soil for raising seedlings in the form of a mixture solution or application on the soil for raising seedlings in the form of a mixture granule, during a period ranging from a sowing time to a seedling-planting time for a crop to be cultivated by a seedling-planting method. 
     
     
         10 . A method for controlling an insect pest, comprising growing seedlings with use of a soil for raising seedlings which has contained therein imidacloprid and at least one compound of the formula [I] or a salt thereof as claimed in any one of  claim 1 ,  2 ,  3 ,  4  or  5 , during a period ranging from a sowing time to a seedling-planting time for a crop to be cultivated by a seedling-planting method. 
     
     
         11 . A method for controlling an insect pest, comprising applying imidacloprid and at least one compound of the formula Ill or a salt thereof as claimed in any one of  claim 1 ,  2 ,  3 ,  4  or  5 , to a soil of a farm field through a drenching treatment, a planting-hole treatment, a planting-hole treated soil incorporation, a plant-root treatment or a plant-root treated soil incorporation during a period ranging from a seedling planting time to a vegetation period for a crop to be cultivated by a seedling-planting method. 
     
     
         12 . A method for controlling an insect pest, comprising effecting an immersion treatment, a dusting treatment or a coating treatment of a seed, a seed potato or a bulb with imidacloprid and at least one compound of the formula [I] or a salt thereof as claimed in any one of  claim 1 ,  2 ,  3 ,  4  or  5 , in the case of a crop to be grown by directly sowing or seeding the seed, the seed potato or the bulb on a farm field. 
     
     
         13 . A method for controlling an insect pest, comprising treating a soil of a farm field with imidacloprid and at least one compound of the formula [I] or a salt thereof as claimed in any one of  claim 1 ,  2 ,  3 ,  4  or  5 , through a drenching treatment, a plant-root treatment or a plant-root treated soil incorporation during a vegetation period for a crop to be cultivated by directly sowing or seeding a seed, a seed potato or a bulb on the farm field.