Japan's Environment Ministry on Monday stepped up its investigations aimed at preventing the spread of fire ants, expanding the search areas and deploying traps to better detect the venomous insects.Under the ministry's new plan, two investigators placed traps in roadside trees and caught some ants on Port Island in Kobe at several locations near the container yard where fire ants were discovered earlier this summer.The ministry has expanded its probes to selected areas within a radius of 2 kilometers from the points where fire ants have been discovered, most of which have been inside ports…READ FULL ARTICLE