Four months after he quit the Congress, Y S Jaganmohan Reddy will face his first major political test in May when he contests the by-elections from his family pocket-borough of Kadapa in Andhra Pradesh. Jaganmohan, who won the seat with a huge margin on a Congress ticket in 2009, will face stiff competition from his former party, which is said to be contemplating to field his uncle and state minister Y S Vivekananda Reddy.

Kadapa Lok Sabha and Pulivendula Assembly segment, represented by Jaganmohan's mother Vijayalaxmi, will go to by-polls on May 8, the Election Commission announced in Delhi on Wednesday.

Son of late Chief Minister Y S Rajasekhara Reddy, the industrialist-turned-politician quit the Congress as well as his Lok Sabha seat on November 29 last year alleging that the party "humiliated" his family.

Political observers feel that a good show by Jagan in the by-elections will spell trouble for Chief Minister N Kiran Kumar Reddy as the rebel leader would try to go for the kill with the help of MLAs loyal to him.