Method of combating insect eggs

Abstract

A method of destroying insect eggs and a method of protecting crops from the insects resulting from the eggs wherein a compound of formula (I) is applied to the eggs

What is claimed is: 
     
       1. A method destroying eggs of insects whereby a compound of formula (I): ##STR2## wherein: R 1  is CN or methyl or a halogen atom; R 2  is S(O) n  R 3  or 4,5-dicyanoimidazol 2-yl or haloalkyl;   R 3  is alkyl or haloalkyl;   R 4  is selected from the group consisting of hydrogen, halogen, --NR 5  R 6 , --C(O)OR 7 , --S(O) m  R 7 , alkyl, haloalkyl, --OR 8 , --N═C(R 9 )(R 10 ) and --C(O)alkyl;   R 5  and R 6  are independently selected from a hydrogen atom, alkyl, haloalkyl, --C(O)alkyl, --C(O)OR 7 , --S(O) r  CF 3  ; or R 5  and R 6  form together a divalent alkylene radical which may be interrupted by one or more heteroatoms. preferably selected from oxcygen, nitrogen and sulfur;   R 7  is selected from alkyl and haloalkyl;   R 8  is selected from alkyl, haloalkyl and hydrogen;   R 9  is selected from hydrogen and alkyl;   R 10  is selected from phenyl or heteroaryl each of which is unsubstituted or substituted by one or more hydroxy, halogen, --O-alkyl, --S-alkyl, cyano, or alkyl or combinations thereof;   X is selected from nitrogen and --C--R 12  ;   R 11  and R 12  are independently selected from halogen hydrogen or CN or NO 2  ;   R 13  is selected from halogen, haloalkyl, haloalkoxy, --S(O) q  CF 3 , --SF 5  ; m, n, q, r are independently selected from 0, 1, and 2; provided that when R 1  is methyl, R 3  is haloalkyl, R 4  is NH 2 , R 11  is Cl, R 13  is CFR 3 , and X is N and provided that when R 2  is 4,5-dicyanoimidazxol 2-yl, R 4  is Cl, R 11  is Cl, R 13  is CF 3 , and X is ═C-Cl; or a pesticidally acceptable salt thereof is applkied on the eggs.   
     
     
       2. A methodd according to claim 1 wherein the compound of formula (I) has one or more of the following features: R 1  is CN;   R 4  is --NR 5  R 6  ;   R 5  R 6  are independently selected from the hydrogen atom, alkyl, haloalkyl, C(O)alkyl, C(O)OR 7  ;   X is C--R 12  ; or   R 13  is selected from a halogen atom, haloalkyl, haloalkoxy, and --SF 5 .   
     
     
       3. A method according to claim 1 wherein the compund of formula (I) is one wherein: R 1  is CN;   R 3  is a haloalkyl radical;   R 4  is NH 2  ;   X is C--R 12  ;   R 11  and R 12  represent, independently of one another, a halogen atom; and R 13  is a haloalkyl radical.   
     
     
       4. A method according to claim 1 wherein the compound of formula (I) is 5-amino-1-(2,6-dichloro-4-trifluoromethyl phenyl)-4-trifluoromethylsulfinyl-3-cyanopyrazole or 5-amino 1(2,6-dichloro-4-trifluoromethylphenyl)-4-ethylsulfinyl-3-cyanopyrazole. 
     
     
       5. A method of protecting a crop by combating eggs of insects susceptible to damage the said crop whereby an effective amount of a compound of formula (I) as defined in claim 1, or a pesticidally acceptable salt thereof, is applied at a crop locus where there are eggs. 
     
     
       6. A method according to claim 5 wherein the crop is cotton, rice, corn or vegetables. 
     
     
       7. A method according to claim 5 wherein the compound of formula (I) is applied from 0.01 to 2 kg/Ha. 
     
     
       8. A method accordinbg to claim 1 wherein the eggs are those of Heliothis xzea, Chilo suppressalis, Tryporyza incertulas or Rice Leaffolder.