This invention provides compounds of Formula 1, their N-oxides and agriculturally suitable saltswhereinR1, R2, R3, R4a, R4b and R5 are as defined in the disclosure. A lower end of the stand rod is welded with an upper support plate. The present invention also relates to a process for the preparation of the above said new pharmaceutical formulation with biological and chemical standardisation protocols. A debug frame counter increments on each interrupt and decrements on each return from interrupt.