A poisonous apple was a poisonous fruit that was found on the planet Zarbon.
Lock tells Load that the apple is poisonous
The apple was so deadly that if you were to take a single bit from it you would die in minutes. They were abondent on some areas on Zarbon, resulting in many herbivore's deaths. During a clone mission to Zarbon, the clone traitor Load ate a poisonous apple saying that killing the loyal clones would be as easy as "Eating this apple". He took several bites into it despite being warned
Load dies from eating a poisonous apple
earlier that they were poisonous. He then died seconds later.