【摘要】 为摸清葡萄果穗霜霉病的最佳预防时期,本试验通过分析葡萄果穗不同发育时期对霜霉菌的敏感性差异,进行了接种验证和田间药效测定试验。结果显示,坐果期的果穗对霜霉菌最为敏感,其次是落花期;落花后是进行果穗霜霉病预防施药的关键时期。更多还原

【Abstract】 In order to find out the best preventive period of downy mildew in grape ears, inoculation verification and field efficacy test were carried out by analyzing the sensitivity difference of different growth stages of grape ears to Plasmopara viticola Berlese et de Toni. The results showed that the ears at fruit setting stage were most sensitive to Plasmopara viticola Berlese et de Toni, followed by the flowering stage. After the fallen petal, it is a key period to employ pesticide for preventing downy mildew of ears.更多还原