Reay-Jones F P F, Wilson L T, Reagan T E, Legendre B L, Way M O
Texas A&M University System Agricultural Research and Extension Center, Beaumont, TX 77713, USA.
J Econ Entomol. 2008 Apr;101(2):237-50. doi: 10.1603/0022-0493(2008)101[237:PELFTC]2.0.CO;2.
The Mexican rice borer, Eoreuma loftini (Dyar) (Lepidoptera: Crambidae), is an invasive species that originated from Mexico, and it is threatening to cause major economic losses to sugarcane, Saccharum spp., and rice, Oryza sativa L., industries in Louisiana. The insect is expected to reach sugarcane and rice production areas in Louisiana by 2008, and infest all of Louisiana sugarcane and rice industries by 2035. When all sugarcane in Louisiana becomes infested, annual yield losses of $220 million would be expected for a cultivar of comparable susceptibility to LCP 85-384 (assuming this cultivar is planted on 100% of the production area). This also assumes the use of the current practice of rainfed production and one application of insecticide, which is presently used by farmers in Louisiana. Irrigation with 30 cm of water is predicted to reduce estimated losses by 29%, whereas four applications of a biorational insecticide such as tebufenozide are expected to reduce the loss in revenue by 53%. The use of the resistant 'HoCP 85-845' would reduce the projected loss in revenue by 24%. Combining all three management tactics on sugarcane, anticipated net loss in revenue would decrease by 66%. The rice industry in Louisiana is projected to suffer from a loss in revenue of $45 million when the entire state is infested. A 77% reduction in loss in revenue is expected with one application of lambda-cyhalothrin. A quarantine on east Texas sugarcane is estimated to save the Louisiana industry between $1.1 billion and $3.2 billion (depending on management) during the time needed for the insect to fully invade the state's sugarcane and rice producing area by natural migration rather than by accidental introduction. The rapid deployment of appropriate management tactics will have a key role in reducing the anticipated economic impact of E. loftini once it becomes a pest in Louisiana sugarcane and rice.
墨西哥螟蛾，Eoreuma loftini (Dyar)（鳞翅目：草螟科），是一种原产于墨西哥的入侵物种，它有可能给路易斯安那州的甘蔗（甘蔗属）和水稻（稻属）产业造成重大经济损失。预计该昆虫将于2008年抵达路易斯安那州的甘蔗和水稻产区，并在2035年侵染路易斯安那州所有的甘蔗和水稻产业。当路易斯安那州所有甘蔗都受到侵染时，对于一种对LCP 85 - 384具有类似易感性的品种（假设该品种种植在100%的生产区域），预计年产量损失将达2.2亿美元。这还假定采用目前的雨养生产方式以及一次杀虫剂施用，这是路易斯安那州农民目前所采用的做法。预计灌溉30厘米深的水可使估计损失减少29%，而施用四次如虫酰肼这样的生物源杀虫剂预计可使收入损失减少53%。使用抗性品种“HoCP 85 - 845”将使预计收入损失减少24%。在甘蔗上综合运用这三种管理策略，预计净收入损失将减少66%。预计当整个路易斯安那州都受到侵染时，该州的水稻产业将遭受4500万美元的收入损失。施用一次高效氯氟氰菊酯预计可使收入损失减少77%。据估计，对得克萨斯州东部的甘蔗实施检疫措施，在该昆虫通过自然迁移而非意外引入全面侵染该州甘蔗和水稻产区所需的时间内，可为路易斯安那州的产业节省11亿至32亿美元（取决于管理措施）。一旦墨西哥螟蛾成为路易斯安那州甘蔗和水稻的害虫，迅速部署适当的管理策略对于减少其预期经济影响将起到关键作用。
