The National Academies of Sciences, Engineering, and Medicine are private, nonprofit institutions that provide expert advice on some of the most pressing challenges facing the nation and world. Our ...

Question: Over the years my crinum lilies have developed red spots on some of the leaves. It makes the plants a bit unsightly. Is there a good control? Answer: Maybe your lilies are popping out their ...

Question: Many of my crinums have red blemishes on their foliage. What can be done to remove or at least control this look? Answer: Maybe you could call this look a holiday decoration or maybe it is ...

GRBD, first identified in California in the 2000s, is a viral infection affecting both wild and commercial grapevines. The disease, caused by the Grapevine Red Blotch Virus (GRBV), leads to poor grape ...

Grapevine red blotch disease (GRBD) is an emerging viral disease that poses a significant threat to the global viticulture industry through its detrimental effects on grape development and wine ...

The Napa Valley Grapegrowers recently hosted ROOTSTOCK 2024 to discuss two viral threats to vineyard health: Leafroll Virus and Red Blotch Disease. Difficulties mitigating the spread of both Leafroll ...