Destron Gas is a type of gas that weakens anything that breathes it. It is seen in the OVA Dragon Ball Z: Plan to Eradicate the Saiyans.
The Destron Gas is created by four machines on Earth, that are all destroyed by the Z Fighters. In Plan to Eradicate the Super Saiyans, the four machines are located in Diablo Desert, Satan City, Jingle Village, and West City, while in the original version they are at Grand Apron, the Western Desert, Poco Poco Volcano, the Land of Ice, and a fifth machine on the Tongari Tower in West City. The machine in West City is protected by a powerful Energy Shield.
Video game appearances
The Destron Gas is featured in the Plan to Eradicate the Saiyans video game series, and also in the Story Mode of Dragon Ball Z: Super Butōden 2. In Super Butōden 2, Bojack and Zangya uses gigantic machines to spread the Destron Gas on Earth and get the Dragon Balls.