13/04/2018

10:15

Mofo branco ameaça soja no Sul

Fonte: AGROLINK

O mofo branco foi uma das doenças que mais contribuiu para a redução da produtividade nas lavouras de soja na safra 2017/2018, atingindo, principalmente, a região Nordeste do Rio Grande do Sul. O fungo é um problema para grande parte dos agricultores já que pode atingir mais de 400 espécies diferentes, incluindo soja, feijão e batata, que são muito cultivadas no Sul do País.

 De acordo com o agrônomo, muitos sojicultores gaúchos consideram que essa é uma doença nova, mas na verdade, a área de abrangência do mofo branco está aumentando de maneira gradativa ao longo dos quatro últimos anos. Para Dellavalle, temperaturas amenas e umidade durante a noite são uma das principais condições que favorecem a proliferação e germinação do patógeno.  “Não podemos esquecer também dos escleródios, os quais já estão no solo dos anos anteriores, o que nos faz pensar como vamos controlar esse fungo”, comenta.
 Dellavalle também alerta que não existe um só produto que solucionará o mofo branco e que a doença deve ser controlada com um programa de manejo integrado. “Isso inclui rotação de culturas, boa palhada (barreira física), uso de controle biológico (Trichoderma spp.), controle químico, genética no que se refere a arquitetura de planta, semente de boa qualidade e aumentar espaçamento entre linhas para melhorar aeração”, conclui.

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