Jaffna and Nuwara Eliya were the only two districts where the caterpillar variant was not detected.
Hence this is the first sighting in Nuwara eliya.
Meanwhile, the Ministry of Agriculture says that two variants of the fall army worm had been detected.
Director W M W Weerakoon said that samples of the worm had been sent to a University in the US for research and hoped that a more effective methodology to combat the menace could be found shortly.