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{"id":4560,"date":"2021-04-22T11:18:52","date_gmt":"2021-04-22T14:18:52","guid":{"rendered":"http:\/\/agribrasilis.com\/?p=4560"},"modified":"2021-06-02T10:05:39","modified_gmt":"2021-06-02T13:05:39","slug":"percevejo-da-barriga-verde","status":"publish","type":"post","link":"https:\/\/agribrasilis.com\/2021\/04\/22\/percevejo-da-barriga-verde\/","title":{"rendered":"Percevejo da barriga-verde"},"content":{"rendered":"
Preju\u00edzos entre 10% a 25%, e at\u00e9 morte de plantas em ataques severos.<\/span><\/p>\n
<\/p>\n
Lucia Vivan, Funda\u00e7\u00e3o MT<\/p><\/div>\n
O percevejo barriga verde (<\/span>Diceraeus melacanthus<\/span><\/i>) ataca o milho em suas fases iniciais, causando problemas de forma\u00e7\u00e3o como perfilhamento e improdutividade. <\/span>Todas as regi\u00f5es produtoras de milho no Mato Grosso apresentaram presen\u00e7a de popula\u00e7\u00e3o do percevejo <\/span>nas \u00faltimas duas safras, resultando em aumento de aplica\u00e7\u00f5es de inseticida e mesmo perdas onde o manejo n\u00e3o foi feito de maneira correta.<\/span><\/p>\n
Em entrevista exclusiva para <\/span>AgriBrasilis<\/b>, <\/span>Lucia Vivan, <\/b>pesquisadora <\/span>da Funda\u00e7\u00e3o de Apoio a Pesquisa Agropecu\u00e1ria do Mato Grosso, fala sobre os problemas causados pelo percevejo e m\u00e9todos de manejo.<\/span><\/p>\n
Lucia Vivan \u00e9 formada em Agronomia pela Universidade Estadual de Londrina, com mestrado em Fitossanidade pela Universidade Federal Rural de Pernambuco\u00a0 e doutorado em Ci\u00eancias Biol\u00f3gicas (Entomologia) pela Universidade Federal do Paran\u00e1 e P\u00f3s-doutorado em Entomologia pela ESALQ (2010).\u00a0<\/span><\/p>\n\n
AgriBrasilis – Como\u00a0<\/b>\u00e9 a a\u00e7\u00e3o do\u00a0<\/b>percevejo barriga-verde\u00a0<\/b>junto \u00e0<\/b>\u00a0planta<\/b>\u00a0de milho e<\/b>\u00a0<\/b>q<\/b>uais os danos\u00a0<\/b>e preju\u00edzos<\/b>?\u00a0<\/b><\/p>\n
Lucia Vivan – <\/b>Os adultos e ninfas de\u00a0<\/span>Diceraeus melacanthus\u00a0<\/span><\/i>(percevejo barriga-verde) se alimentam na base de pl\u00e2ntulas de milho injetando os estiletes atrav\u00e9s da bainha at\u00e9 as folhas internas, o que causar\u00e1 a les\u00e3o que \u00e9 percebida visualmente ap\u00f3s a expans\u00e3o\u00a0dessas folhas. Esse ataque ocorre poucos dias ap\u00f3s a emerg\u00eancia da planta de milho e pode causar morte da pl\u00e2ntula ou da gema apical o que acarretar\u00e1 um perfilhamento dessa planta, e uma planta improdutiva. Algumas folhas do cartucho n\u00e3o conseguem desenrolar e apresentam\u00a0um aspecto de encharutamento com amarelecimento\u00a0das folhas.\u00a0<\/span><\/p>\n
Os preju\u00edzos podem variar de 10% a 25% ou morte de plantas em ataques severos.<\/span><\/p>\n
<\/p>\n
AgriBrasilis –<\/b>H\u00e1 uma estimativa da \u00e1rea afetada no Mato Grosso?\u00a0<\/b><\/p>\n
Lucia Vivan – <\/b>Nas duas \u00faltimas safras todas as regi\u00f5es produtoras de milho apresentaram presen\u00e7a de popula\u00e7\u00e3o de percevejo barriga verde e, algumas regi\u00f5es com popula\u00e7\u00f5es altas onde o manejo dessa esp\u00e9cie n\u00e3o foi bem realizado ocorreram perdas significativas.\u00a0 \u00a0<\/span><\/p>\n
\u00a0<\/b><\/p>\n
AgriBrasilis – <\/b>Quais outras culturas tamb\u00e9m s\u00e3o\u00a0<\/b>ataca<\/b>das<\/b>?\u00a0<\/b><\/p>\n
Lucia Vivan – <\/b>O percevejo barriga verde \u00e9 um inseto pol\u00edfago e com isso sobrevive em diferentes culturas, coberturas utilizadas na entressafra, como tamb\u00e9m grande parte das plantas daninhas. A cultura da soja \u00e9 um hospedeiro onde esse inseto consegue se desenvolver e aumentar popula\u00e7\u00f5es para as \u00e1reas com milho na sequ\u00eancia.\u00a0\u00a0<\/span><\/p>\n
\u00a0<\/b><\/p>\n
AgriBrasilis – <\/b>Qua<\/b>is os m\u00e9todos de controle e manejo?<\/b><\/p>\n
Lucia Vivan – <\/b>O controle do percevejo barriga verde na cultura do milho deve ser com o uso de tratamento de sementes com produtos neonicotinoides e aplica\u00e7\u00f5es logo ap\u00f3s a emerg\u00eancia em 3 a 5 dias ap\u00f3s o plantio e repetidas aos 7 a 10 dias ap\u00f3s o plantio. A necessidade de mais aplica\u00e7\u00f5es depender\u00e1 da press\u00e3o da praga na \u00e1rea. O dano nas plantas de milho causado por percevejo barriga verde \u00e9 at\u00e9 o est\u00e1gio V5. A partir do momento que a planta tem um engrossamento do caule maior de 1 cm ocorre redu\u00e7\u00e3o de dano.<\/span><\/p>\n
Para o manejo de percevejo barriga verde no sistema de produ\u00e7\u00e3o deve-se manejar essa popula\u00e7\u00e3o durante todo o per\u00edodo do ano. \u00c1reas com presen\u00e7a de plantas daninhas ir\u00e3o favorecer o desenvolvimento dessa praga, oferecendo alimento e local de oviposi\u00e7\u00e3o, por isso \u00e1reas em pousio tem grande probabilidade de manter popula\u00e7\u00f5es dessa esp\u00e9cie. Antes do plantio da soja \u00e9 importante avaliar a palhada e verificar se tem a presen\u00e7a do inseto, pode-se optar por uma desseca\u00e7\u00e3o pr\u00e9-plantio e, tamb\u00e9m uso de tratamento de sementes focando o percevejo barriga verde no plantio da cultura da soja.<\/span><\/p>\n
Durante o desenvolvimento da cultura da soja \u00e9 importante avaliar a popula\u00e7\u00e3o de barriga verde, principalmente se a cultura safrinha for o milho. No entanto, essa esp\u00e9cie se mant\u00e9m mais na palhada, o que pode dificultar seu monitoramento.\u00a0<\/span><\/p>\n
Antes do plantio do milho tamb\u00e9m deve-se monitorar a popula\u00e7\u00e3o de percevejo barriga verde na palhada e, pode-se realizar uma aplica\u00e7\u00e3o logo ap\u00f3s o plantio do milho.\u00a0<\/span><\/p>\n
\u00a0<\/b><\/p>\n
AgriBrasilis – <\/b>A quantidade de defensivos agr\u00edcolas aplicados para o controle desta praga aumentou de forma significativa?<\/b><\/p>\n
Lucia Vivan – <\/b>Sim, nos \u00faltimos anos tem-se realizado\u00a0maior n\u00famero de aplica\u00e7\u00f5es visando essa praga.\u00a0<\/span><\/p>\n
Na maioria das \u00e1reas se tem feito 3 a 4 aplica\u00e7\u00f5es, no entanto muitas vezes se tem o dano, isso devido a altas popula\u00e7\u00f5es\u00a0presentes nas \u00e1reas, decorrente do controle n\u00e3o realizado dentro do sistema de produ\u00e7\u00e3o, perman\u00eancia de plantas daninhas nas \u00e1reas e tigueras de milho.<\/span><\/p>\n
<\/p>\n
AgriBrasilis – <\/b>Qual o motivo deste surto de infesta\u00e7\u00e3o?<\/b><\/p>\n
Lucia Vivan – <\/b>Hoje o sistema de produ\u00e7\u00e3o propiciou a perman\u00eancia do inseto nas \u00e1reas. Hoje se tem a intensifica\u00e7\u00e3o do cultivo de milho principalmente na safrinha, o rota\u00e7\u00e3o e sucess\u00e3o de culturas tem sido modificada em rela\u00e7\u00e3o a composi\u00e7\u00e3o, abund\u00e2ncia e capacidade de adapta\u00e7\u00e3o de diferentes esp\u00e9cies de pragas. Essas mudan\u00e7as, podem, ter desencadeado o crescimento populacional de algumas esp\u00e9cies de pragas e, dentre essas o percevejo\u00a0<\/span>Diceraeus melacanthus<\/span><\/i>.\u00a0<\/span><\/p>\n
\u00c1reas com plantas daninhas remanescentes e tigueras de milho tamb\u00e9m propiciam a perman\u00eancia e crescimento dessa esp\u00e9cie.<\/span><\/p>\n
Preju\u00edzos entre 10% a 25%, e at\u00e9 morte de plantas em ataques severos.<\/p>\n","protected":false},"author":4,"featured_media":4562,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[30,34,53],"tags":[33],"acf":[],"yoast_head":"\n
Percevejo da barriga-verde - Agribrasilis - Inside Agribusiness<\/title>\n\n\n\n\n\n\n\n\n\n\n\n\n\t\n\t\n\t\n\n\n\n\t\n\t\n\t\n