{"pk":41287,"title":"Strategy of HLB management with insecticides in citrus groves in São Paulo, Brazil","subtitle":null,"abstract":"Huanglongbing(HLB) , disease caused by bacteria \nCandidatus \nLiberibater asiaticus and \nCa. \nL. americanus\n,\n has as vector \nDiaphorina citri\n. Since 2004 has caused huge losses on citrus industry of São Paulo state, Brazil. This research evaluated, during three consecutive years, an insecticide spraying program (Bayer® program – T1) consisted of two imidacloprid drench applications during the rainy season and one trunk application (Winner®) in the autumn, preceded and followed by foliar sprays of insecticides (Decis® or Provado®) based on an psyllid action threshold, compared to standard program of the grower, that used several foliar sprayings (Standard program – T2). This trial was carried out in 34 commercial groves in different counties of São Paulo state with trees at different age, variety/rootstock combination and canopy size. In each grove there was one plot per treatment consisted by 1000 trees. The incidence of \nD. citri\n and the number of HLB-symptomatic plants was fortnightly evaluated. The data were subjected to analysis  by the test F and the averages comparated by Tukey (0,05). In average, after three years, it was observed in T1 a lower incidence of \nD. citri\n and consistent reduction of the number of HLB symptomatic plants (25,4) with 9 less insecticide applications. Even having been a consistent reduction of the vector population, added to the known effect of systemic acquired resistance (SAR) due to use of Imidacloprid in plants of citrus infected with \nXanthomonas citri\n subsp. \ncitri\n, this research shows an analogous process could be occurring on the pathosystem Citrus x \nCandidatus \nL. asiaticus e \nC. \nL. americanos\n, \nwith positive contribution to growers and should be more detailed on further researches.","language":"en","license":{"name":"Creative Commons Attribution 4.0","short_name":"CC BY 4.0","text":"Attribution — You must give appropriate credit, provide a link to the license, and indicate if changes were made. You may do so in any reasonable manner, but not in any way that suggests the licensor endorses you or your use.\n\nNo additional restrictions — You may not apply legal terms or technological measures that legally restrict others from doing anything the license permits.","url":"https://creativecommons.org/licenses/by/4.0"},"keywords":[],"section":"Abstracts of Presentations at the 3rd International Research Conference on Huanglongbing","is_remote":true,"remote_url":"https://escholarship.org/uc/item/44c57799","frozenauthors":[{"first_name":"R.","middle_name":"B.","last_name":"Baldassari","name_suffix":"","institution":"Bayer, Ribeirão Preto, Brasil","department":"None"},{"first_name":"F.","middle_name":"","last_name":"Lozano","name_suffix":"","institution":"Bayer, Ribeirão Preto, Brasil","department":"None"},{"first_name":"D.","middle_name":"","last_name":"Rinaldo","name_suffix":"","institution":"Bayer, Ribeirão Preto, Brasil","department":"None"},{"first_name":"C.","middle_name":"A.G.","last_name":"Gobato","name_suffix":"","institution":"Unicampo, Maringá, Brasil","department":"None"},{"first_name":"D.","middle_name":"F.","last_name":"Costa","name_suffix":"","institution":"Unicampo, Maringá, Brasil","department":"None"}],"date_submitted":"2014-12-16T16:22:24-08:00","date_accepted":"2014-12-16T16:22:24-08:00","date_published":"2013-12-31T16:00:00-08:00","render_galley":null,"galleys":[{"label":"","type":"pdf","path":"https://journalpub.escholarship.org/iocv_journalcitruspathology/article/41287/galley/30886/download/"}]}