Tag: lettuce

Pathogen Profile: Bremia lactucae

Bremia lactucae Introduction Bremia lactucae causes lettuce downy mildew for both indoor and outdoor lettuce. It is a significant pathogen in cooler environments like late-fall seasons and heated winter greenhouses. This plant pathogen is an oomycete, and symptoms of the disease are similar to late blight. However, the disease may appear as white fungal growth […]
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Pathogen Profile: Olpidium virulentus

Olpidium virulentus Introduction  Olpidium virulentus is a parasitic fungus that infects plant roots, including leafy greens grown hydroponically. The pathogen can transmit two serious viruses: Lettuce big-vein associated virus (LBVaV) and Mirafiori Lettuce Big Vein Virus (MLBBV), causing a decrease in overall yield. Olpidium virulentus does not cause significant plant diseases but is a vector for viruses […]
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Pathogen Profile: Xanthomonas hortorum pv. vitians

Xanthomonas hortorum pv. vitians Introduction Xanthomonas hortorum pv. vitians is a  bacterial pathogen responsible for bacterial leaf spot in lettuce and other leafy vegetables; this pathogen poses a significant challenge to growers worldwide [1]. Bacterial leaf spot can lead to substantial crop yield losses and severe economic consequences. Historically, outbreaks can cause up to 100% […]
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