Cleistocactus strausii
As a houseplant, the Silver Torch cactus is an easy to take care of so long as over-watering is avoided. To naturally simulate the porous effects of the sand in its native habitat, it's important to ensure that excess water will not pool in the soil, causing the roots to become water logged.
This plant’s native habitat does not have winter, but when temperatures drop to the low twenties, it can exhibit signs of tip frost. 
The Silver Torch cactus is most susceptible to 
mealybugs 
and spider mite.
Crayon Shin-chan: My Moving Story! Cactus Large Attack!
Shinnosuke ate the food that was passed from the Mayor and wanted to have a pee. But it was forbidden by Mayor's law to stand and pee on the roads. So, he had to go into the fields to pee. While peeing, a small killer cactus came near him. Shinnosuke peed on the cactus. To his surprise, the cactus got wrinkled and died. He wondered if pee was the weakness of the cactus. He told this thing to the Mayor, who was still busy thinking of his revitalization plan. Then they all realized that the weakness of cactus is water.