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Tratamento de sementes com abamectina e Paecilomyces lilacinus no manejo de Heterodera glycines na cultura da soja

Authors: Janaina Alves de Almeida; Jean Cramenak de Souza; Fernando Godinho de Araújo;

Tratamento de sementes com abamectina e Paecilomyces lilacinus no manejo de Heterodera glycines na cultura da soja

Abstract

A soja é a mais importante oleaginosa cultivada mundialmente, sendo o Brasil o segundo maior produtor. Para manutenção de índices satisfatórios de produtividade é necessário o manejo eficiente de diversos problemas fitossanitários que afetam a cultura, dentre eles os causados por nematoides. Identificar novas alternativas de manejo desses nematoides faz-se necessário para manutenção de baixos níveis populacionais nas áreas com a presença desses parasitas. Assim, o presente estudo teve como objetivo avaliar a eficiência do tratamento de sementes com abamectina isolada e associada com o fungo Paecilomyces lilacinus no manejo de Heterodera glycines na cultura da soja. O ensaio foi conduzido em delineamento inteiramente casualizado em esquema fatorial 4 (doses de abamectina) x 2 (com e sem a adição de P. lilacinus), com 5 repetições, empregando a cultivar de soja BRS Valiosa RR, suscetível ao nematoide, em ambiente protegido. As doses de abamectina empregadas foram 0, 50, 100 e 200 g. i.a. 100 kg sementes-1 e de P. lilacinus, 600 g p.c. 100 kg sementes-1 (7,5x109 UFC/g de PC). Aos 30 dias após a inoculação foram avaliadas a massa fresca das raízes, o número de fêmeas por sistema radicular, fêmeas por grama de raiz e ovos por fêmea do nematoide. A massa fresca das raízes e o número de fêmeas por sistema radicular foram superiores nos tratamentos sem a adição do fungo P. lilacinos. O tratamento empregando o fungo P. lilacinus apresentou um maior número de fêmeas por grama de raiz quando comparado ao tratamento sem a utilização do fungo. O número de fêmeas por sistema radicular e de ovos por fêmeas reduziram em função das diferentes doses de abamectina utilizadas. A abamectina isolada e associada ao fungo P. lilacinus apresenta potencial de utilização no manejo de H. glycines na cultura da soja. 

Keywords

Science, Q, Education (General), L7-991

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selected citations
These citations are derived from selected sources.
This is an alternative to the "Influence" indicator, which also reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Citations provided by BIP!
popularity
This indicator reflects the "current" impact/attention (the "hype") of an article in the research community at large, based on the underlying citation network.
BIP!Popularity provided by BIP!
influence
This indicator reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Influence provided by BIP!
impulse
This indicator reflects the initial momentum of an article directly after its publication, based on the underlying citation network.
BIP!Impulse provided by BIP!
4
Average
Average
Average
gold