​As of April 19, 2025, there are no recent news reports indicating that a woman has been sentenced to life imprisonment for killing five individuals by mixing insecticide into dal.​
However, a notable incident from June 2018 involved a 23-year-old woman named Pradnya Survase from Khalapur, Maharashtra. She was arrested for allegedly poisoning dal served at a family gathering, resulting in the deaths of five guests, including four children aged between 7 and 13, and a 53-year-old man. The motive cited was ongoing taunts from her in-laws regarding her dark complexion and cooking skills. She reportedly mixed a chemical used to kill snakes into the dal served at the event.
While she was arrested and charged with murder and other offences under the Indian Penal Code, there is no publicly available information confirming that she was sentenced to life imprisonment.
If you are referring to a different incident or have more specific details, please provide them so I can assist you further.
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