{"id":21869,"date":"2009-07-09T00:00:00","date_gmt":"2009-07-09T04:00:00","guid":{"rendered":"http:\/\/www.farmchemicalsinternational.com\/2009\/07\/09\/asian-parasites-could-help-us-pest-problem\/"},"modified":"2019-09-16T13:46:39","modified_gmt":"2019-09-16T17:46:39","slug":"asian-parasites-could-help-us-pest-problem","status":"publish","type":"post","link":"https:\/\/www.agribusinessglobal.com\/pt\/industry-news\/asian-parasites-could-help-us-pest-problem\/","title":{"rendered":"Parasitas asi\u00e1ticos podem ajudar no problema de pragas nos EUA"},"content":{"rendered":"

Um predador natural pode proteger as planta\u00e7\u00f5es de soja dos pulg\u00f5es, esperam os produtores do Centro-Oeste americano. Imprensa associada <\/a>relata que pesquisadores est\u00e3o explorando diferentes m\u00e9todos de combate a infesta\u00e7\u00f5es de pulg\u00f5es, que podem destruir at\u00e9 40% da lavoura de um agricultor. A ind\u00fastria de soja dos EUA movimentou US$ $27,3 bilh\u00f5es no ano passado. Os pesquisadores est\u00e3o analisando Binodoxys communis<\/em>, um pequeno inseto parasita que insere um ovo no pulg\u00e3o. O ovo eclode em uma larva que mata o pulg\u00e3o, alimenta-se dele e emerge como um adulto a partir do que se torna uma casca mumificada do pulg\u00e3o. Pesquisadores universit\u00e1rios do Centro-Oeste, no entanto, questionam se o pequeno inseto asi\u00e1tico consegue sobreviver aos rigorosos invernos do Centro-Oeste dos EUA.<\/p>\n

David Ragsdale, professor de entomologia na Universidade de Minnesota <\/a>e gerente do projeto, diz: \u201c\u00c9 uma corrida armamentista, e a melhor maneira de controlar isso \u00e9 garantir que haja inimigos naturais suficientes para retardar essa reprodu\u00e7\u00e3o\u201d. O pesquisador com sede em Iowa Programa de Pesquisa de Soja Centro-Norte <\/a>comprometeu cerca de $3 milh\u00f5es desde 2001 para pesquisas sobre pulg\u00f5es, incluindo o desenvolvimento de uma planta de soja naturalmente resistente aos insetos, disse David Wright, diretor de pesquisa do grupo.<\/p>\n

No entanto, os resultados at\u00e9 agora n\u00e3o t\u00eam sido animadores, disse Ragsdale. "Pode n\u00e3o ser a esp\u00e9cie certa", disse ele. "H\u00e1 de 11 a 15 outras esp\u00e9cies em v\u00e1rios est\u00e1gios de avalia\u00e7\u00e3o em laborat\u00f3rios de quarentena aqui e no USDA em Newark, Delaware."<\/p>\n

Os fabricantes de pesticidas n\u00e3o precisam temer que os parasitas substituam os inseticidas; na melhor das hip\u00f3teses, os predadores far\u00e3o parte de um programa de MIP que inclui predadores naturais e inseticidas convencionais. Kelley Tilmon, pesquisadora e entomologista de extens\u00e3o da Universidade Estadual de Dakota do Sul<\/a>, disse que n\u00e3o \u00e9 realista esperar que os parasitas eliminem os pulg\u00f5es. Mas se eles puderem ser usados em vez de um tratamento com inseticida em 5% da \u00e1rea de soja do estado, os produtores economizariam cerca de $2,3 milh\u00f5es por ano, disse Tilmon.<\/p>\n

A pesquisa \u00e9 financiada em parte por agricultores como David Iverson, que contribui com 50 centavos para cada $100 em vendas de soja para um programa autorizado pelo governo federal para promo\u00e7\u00e3o e pesquisa da soja. "Nos \u00faltimos seis anos, tive que pulverizar contra pulg\u00f5es e [a infesta\u00e7\u00e3o] definitivamente atingiu os limites econ\u00f4micos", disse Iverson, que cultiva cerca de 320 hectares de soja perto de Astoria, no centro-leste da Dakota do Sul.<\/p>\n

Com o inseticida custando de $10 a $15 por acre, isso pode adicionar $8.000 ou mais aos seus custos. Mas a diferen\u00e7a entre pulverizar e n\u00e3o pulverizar pode ser de 10 alqueires ou mais por acre na colheita, disse Iverson, presidente da Conselho de Pesquisa e Promo\u00e7\u00e3o da Soja de Dakota do Sul<\/a>.<\/p>","protected":false},"excerpt":{"rendered":"

Um predador natural pode proteger planta\u00e7\u00f5es de soja de pulg\u00f5es, esperam produtores do Centro-Oeste americano. A Associated Press relata que pesquisadores est\u00e3o\u2026<\/p>","protected":false},"author":110,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[489],"tags":[],"class_list":["post-21869","post","type-post","status-publish","format-standard","hentry","category-industry-news"],"yoast_head":"\nAsian Parasites Could Help US Pest Problem - AgriBusiness Global<\/title>\n<meta name=\"description\" content=\"A natural predator could protect soybean crops from aphids, hope growers across the American Midwest. 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