near Darwin, Northern Territory. 2005 Chloris inflata, Euphorbia heterophylla, Cyanthillium cinereum, and Tridax procumbens, in banana farms in Australia known to be infected with TR4. These weeds may be acting as sources of inoculum. 2010 Starting here TR4 spread from its origin in southeast Asia westward into Vietnam, Laos, Myanmar, India, Pakistan, Oman, Jordan, Lebanon, Israel, and Mozambique. 2015 March 26: Sample taken from a suspect tree on a farm in Mareeba, Queensland, Australia. March 28: TR4 was detected in those samples. The far north of Queensland producing 95% of the $580 million of bananas Australia turns out every year, this was immediately taken seriously by Biosecurity Queensland's Panama TR4 Program and the Australian Banana Growers' Council. However, the test used (the Dita PCR) was questioned after this detection was reported, and is no longer used by BQ. A dissection of the tree trunk showed none of the usual symptoms of Fusarium infiltration. May 18: Another 18 samples (of unspecified individual(s) from the same farm) tested negative. BQ decided to only use vegetative compatibility groups and molecular diagnostics from then on. First legitimate detection later in the year in Tully, Queensland. 2017 Queensland University of Technology researchers located a gene (RGA2) which is present but unexpressed in Cavendish, which they found expressed and effective against TR4 in the diploid M. a. ssp. malaccensis. 2018 TR4 is found widely throughout Southeast Asia. 2020 TR4 was still only found on five plantations in the same area due to this government and industry response. Queensland's response to TR4 has been of interest to countries in Latin America as TR4 moves into that region for the first time. TR4 is found in Laos, Vietnam, Taiwan, Malaysia, Borneo, Indonesia, mainland China, Philippines, Jordan, Mozambique, Pakistan, Lebanon, Oman, India, and North Queensland in Australia. 2021 In April the first detection in Peru occurred, in the Department of Piura, and on the 11th the National Service for Agricultural Health declared a phytosanitary emergency for the whole country. Ecuador had already been inspecting imports at the border due to Colombia's detection, and then increased inspections further in April. The appearance of TR4 in Peru threatens its of plantations. Subtropical Race 4/STR4 / is a subtropical race and does not become symptomatic on Cavendish until the trees are stressed by cold. quarantines for STR4 are imposed over South East Queensland, northern New South Wales, and Western Australia. STR4 is