Erin Patterson's appeal arguments include that jurors and witnesses had stayed in the same hotel. Photo: Joel Carrett/AAP PHOTOS

Mushroom murderer Erin Patterson is challenging her conviction on seven grounds, taking issue with jury management during deliberations and "oppressive" prosecution questioning while she gave evidence in her trial.

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The 51-year-old was convicted and jailed for life in September with a non-parole period of 33 years after being found guilty of murdering her former in-laws, Don and Gail Patterson, 70, and Gail's sister Heather Wilkinson, 66.

A jury found she

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