Cactus
Fungi, bacteria and viruses attack cacti, the first two particularly when plants are over-watered. Fusarium rot can gain entry through a wound and cause rotting accompanied by red-violet mold. ""Helminosporium" rot" is caused by "Bipolaris cactivora" ( "Helminosporium cactivorum"); "Phytophthora" species also cause similar rotting in cacti. Fungicides may be of limited value in combating these diseases. Several viruses have been found in cacti, including cactus virus X. These appear to cause only limited visible symptoms, such as chlorotic (pale green) spots and mosaic effects (streaks and patches of paler color). However, in an "Agave" species, cactus virus X has been shown to reduce growth, particularly when the roots are dry. There are no treatments for virus diseases.
Crayon Shin-chan: My Moving Story! Cactus Large Attack!
They decided to defeat the killer cactus using water. But there was shortage of water in the city. At the suggestion of Carolina and Francisca, they decided to use the water of the water supply tank on Chichideka mountain. The Mayor was again opposed to use the water from the tank, but had to give up this time. He let out his anger on Sumaho-chan. Hiroshi's plan was to inject water into a playing balloon called "Sabo-chan", and throw it at the Queen Cactus.