Population Fluctuation of Thlastocoris laetus (Hemiptera: Coreidae) in the Amazon

Autor: Silva, William Maciel da, 0000-0003-2132-8673
Přispěvatelé: Silva, Neliton Marques da, Fazolin, Murilo, Acioli, Agno Nonato Serr??o, Vasconcelo, Geraldo Jos?? Nascimento de
Jazyk: portugalština
Rok vydání: 2021
Předmět:
Zdroj: Biblioteca Digital de Teses e Dissertações da UFAM
Universidade Federal do Amazonas (UFAM)
instacron:UFAM
Popis: Submitted by WILLIAM DA SILVA (netopagoa1992@outlook.com) on 2021-11-23T17:56:29Z No. of bitstreams: 4 license_rdf: 0 bytes, checksum: d41d8cd98f00b204e9800998ecf8427e (MD5) Disserta????o_William Silva_PPGATR.pdf: 1951603 bytes, checksum: 3a6315faa5e3e5839ef9a25fbae45955 (MD5) Ata_defesa_disserta????o_William Silva.pdf.pdf: 223252 bytes, checksum: c9299c5af5df160726fdf829f7fa4fb5 (MD5) carta de encaminhamento.pdf: 38830 bytes, checksum: 769716c40077e04b8a6f47e1273d529a (MD5) Approved for entry into archive by Agronomia Tropical PPGAGTR (agronomiatropical@ufam.edu.br) on 2021-11-23T17:58:50Z (GMT) No. of bitstreams: 4 license_rdf: 0 bytes, checksum: d41d8cd98f00b204e9800998ecf8427e (MD5) Disserta????o_William Silva_PPGATR.pdf: 1951603 bytes, checksum: 3a6315faa5e3e5839ef9a25fbae45955 (MD5) Ata_defesa_disserta????o_William Silva.pdf.pdf: 223252 bytes, checksum: c9299c5af5df160726fdf829f7fa4fb5 (MD5) carta de encaminhamento.pdf: 38830 bytes, checksum: 769716c40077e04b8a6f47e1273d529a (MD5) Rejected by Divis??o de Documenta????o/BC Biblioteca Central (ddbc@ufam.edu.br), reason: Na pista (palavras-chave), n??o insira termo em it??lico! Para a emiss??o correta da ficha, acesse: https://fichacatalografica.ufam.edu.br/ficha/create on 2021-11-24T03:19:32Z (GMT) Submitted by WILLIAM DA SILVA (netopagoa1992@outlook.com) on 2021-12-02T22:19:55Z No. of bitstreams: 4 license_rdf: 0 bytes, checksum: d41d8cd98f00b204e9800998ecf8427e (MD5) Ata_defesa_disserta????o_William Silva.pdf.pdf: 223252 bytes, checksum: c9299c5af5df160726fdf829f7fa4fb5 (MD5) carta de encaminhamento.pdf: 38830 bytes, checksum: 769716c40077e04b8a6f47e1273d529a (MD5) Disserta????o_William Silva_PPGATR.pdf: 1955075 bytes, checksum: d6d4ef4898ae0311823e6f70ee0f1fee (MD5) Approved for entry into archive by Agronomia Tropical PPGAGTR (agronomiatropical@ufam.edu.br) on 2021-12-08T19:18:01Z (GMT) No. of bitstreams: 4 license_rdf: 0 bytes, checksum: d41d8cd98f00b204e9800998ecf8427e (MD5) Ata_defesa_disserta????o_William Silva.pdf.pdf: 223252 bytes, checksum: c9299c5af5df160726fdf829f7fa4fb5 (MD5) carta de encaminhamento.pdf: 38830 bytes, checksum: 769716c40077e04b8a6f47e1273d529a (MD5) Disserta????o_William Silva_PPGATR.pdf: 1955075 bytes, checksum: d6d4ef4898ae0311823e6f70ee0f1fee (MD5) Approved for entry into archive by Agronomia Tropical PPGAGTR (agronomiatropical@ufam.edu.br) on 2021-12-08T19:17:57Z (GMT) No. of bitstreams: 4 license_rdf: 0 bytes, checksum: d41d8cd98f00b204e9800998ecf8427e (MD5) Ata_defesa_disserta????o_William Silva.pdf.pdf: 223252 bytes, checksum: c9299c5af5df160726fdf829f7fa4fb5 (MD5) carta de encaminhamento.pdf: 38830 bytes, checksum: 769716c40077e04b8a6f47e1273d529a (MD5) Disserta????o_William Silva_PPGATR.pdf: 1955075 bytes, checksum: d6d4ef4898ae0311823e6f70ee0f1fee (MD5) Approved for entry into archive by Divis??o de Documenta????o/BC Biblioteca Central (ddbc@ufam.edu.br) on 2021-12-09T22:00:44Z (GMT) No. of bitstreams: 4 license_rdf: 0 bytes, checksum: d41d8cd98f00b204e9800998ecf8427e (MD5) Ata_defesa_disserta????o_William Silva.pdf.pdf: 223252 bytes, checksum: c9299c5af5df160726fdf829f7fa4fb5 (MD5) carta de encaminhamento.pdf: 38830 bytes, checksum: 769716c40077e04b8a6f47e1273d529a (MD5) Disserta????o_William Silva_PPGATR.pdf: 1955075 bytes, checksum: d6d4ef4898ae0311823e6f70ee0f1fee (MD5) Made available in DSpace on 2021-12-09T22:00:44Z (GMT). No. of bitstreams: 4 license_rdf: 0 bytes, checksum: d41d8cd98f00b204e9800998ecf8427e (MD5) Ata_defesa_disserta????o_William Silva.pdf.pdf: 223252 bytes, checksum: c9299c5af5df160726fdf829f7fa4fb5 (MD5) carta de encaminhamento.pdf: 38830 bytes, checksum: 769716c40077e04b8a6f47e1273d529a (MD5) Disserta????o_William Silva_PPGATR.pdf: 1955075 bytes, checksum: d6d4ef4898ae0311823e6f70ee0f1fee (MD5) Previous issue date: 2021-10-21 Pineapple is vulnerable to pests, which are among the factors that can interfere with fruit production. Among these, Thlastocoris laetus (Hemiptera: Coreidae) can be highlighted. This stink bug attacks the fruit and the stalk of infructescence, which can lead to death on the plants. Studies related to bioecology and biological control are still scarce. The present study aimed to evaluate the population fluctuation of Thlastocoris laetus (Mayr, 1866) and the main factors influencing this population fluctuation, as well as the occurrence of natural parasitism in eggs of this pest, and to verify the spatial distribution of bedbugs in the field. The study was carried out from January to December 2020. The area established was the Experimental Farm of the Federal University of Amazonas. In an orchard of 540 m2cultivated with pineapple of the cultivar ???Turia??u???. To obtain data, records and removal of adult stink bugs and their immature forms (eggs and nymphs) were performed, with evaluations being carried out on the following plant structures: chicks, fruits, crowns, peduncle and leaves. The stink bug specimens were collected in the morning, every fifteen days on twenty randomly selected plants. The pineapple bug population was associated with pineapple phenology and climatic factors in each collection period. Field egg parasitism was evaluated on the same plants in the analyses. Parasitism was calculated by the relationship between the number of parasitized eggs and the total number of eggs counted in the laying. The structures of the pineapple plant containing egg masses were also collected. Parasitism rates were estimated considering the total number of eggs collected and the number of emerged parasitoids. In order to identify the patterns of spatial distribution of T. laetus, samples obtained from the fluctuation population of collected stink bugs were evaluated. The mathematical models used to assess the spatial distribution were determined by the dispersion indices and frequency distributions. The population fluctuation of T. laetusshowed two population peaks for adults, occurring in February and March, and three for nymphs, occurring in February, May and July. Rainfall did not significantly affect the population of T. laetus, with the largest populations occurring between January and July, related to the presence of fruits in the area. Three species of egg parasitoids were identified in the research, which together presented a parasitism rate of 46.15%, considered efficient in natural parasitism. The negative binomial was satisfactory, demonstrating that the population of nymphs and adults of T. laetus has an aggregated distribution in the pineapple crop. O abacaxizeiro apresenta vulnerabilidade ??s pragas, as quais est??o entre os fatores que podem interferir na produ????o dos frutos. Dentre estes pode-se destacar Thlastocoris laetus (Hemiptera: Coreidae). Este percevejo ataca os frutos e o ped??nculo da infrutesc??ncia, podendo levar as plantas ?? morte. Ainda s??o escassos estudos relacionados ?? bioecologia e controle biol??gico. O presente estudo objetivou avaliar a flutua????o populacional de Thlastocoris laetus (Mayr, 1866) e os principais fatores que influenciam essa flutua????o populacional, assim como ocorr??ncia de parasitismo natural em ovos desta praga, e verificar a distribui????o espacial dos percevejos em campo. O estudo foi desenvolvido no per??odo de janeiro a dezembro de 2020. A ??rea estabelecida foi a Fazenda Experimental da Universidade Federal do Amazonas. Em um pomar de 540 m2 cultivado com abacaxi da cultivar ???Turia??u???. Para obten????o de dados foram realizados registros e remo????o de percevejos adultos e suas formas imaturas (ovos e ninfas), sendo executado avalia????es nas seguintes estruturas vegetais: filhotes, frutos, coroas, ped??nculo e folhas. As coletas dos esp??cimes de percevejos foram realizadas no per??odo da manh??, a cada quinze dias em vinte plantas selecionados aleatoriamente. A popula????o do percevejo do abacaxi foi associada a fenologia do abacaxi e aos fatores clim??ticos em cada ??poca de coleta. O parasitismo de ovos em campo foi avaliado nas mesmas plantas em an??lises. O parasitismo foi calculado pela rela????o entre o n??mero de ovos parasitados e o total de ovos contabilizados na postura. Tamb??m foram coletadas as estruturas da planta de abacaxi contendo massas de ovos. As taxas de parasitismo foram estimadas considerando-se o total de ovos recolhidos e o n??mero de parasitoides emergidos. Para identifica????o dos padr??es de distribui????o espacial de T. laetus foram avaliadas amostras obtidas da flutua????o populacional de percevejos coletados. Os modelos matem??ticos utilizados para avaliar a distribui????o espacial foi determinado pelos ??ndices de dispers??o e distribui????es de frequ??ncias. A flutua????o populacional de T. laetus apresentou dois picos populacionais para adultos, ocorrendo nos meses de fevereiro e mar??o e, tr??s para ninfas, ocorrendo nos meses de fevereiro, maio e julho. A precipita????o pluvial n??o afetou consideravelmente a popula????o de T. laetus, sendo que as maiores popula????es, ocorreram entre os meses de janeiro a julho relacionado ?? presen??a de frutos na ??rea. Foram identificadas na pesquisa tr??s esp??cies de parasitoides de ovos que juntas apresentaram taxa de parasitismo de 46,15% considerado eficiente no parasitismo natural. A binomial negativa foi satisfat??ria demonstrando que popula????o de ninfas e adultos de T. laetus tem uma distribui????o agregada na cultura do abacaxi. Quando baixa o manual de autodep??sito em pdf a qualidade da ilustra????es do passo-passo n??o se apresentam muito vis??vel se poss??vel atentar na melhoria da figuras ilustradas n??o sendo todas. No entanto est??o de parab??ns pela elabora????o do manual que ajudou muito.
Databáze: OpenAIRE
Externí odkaz: