Rhubarb

Asked May 24, 2019, 7:50 PM EDT

I keep losing leaves to redness. I think it's a virus? Can I harvest and use our is all lost? Also caught this bug on them.

Calvert County Maryland

1 Response

Hi- we think that the red discoloration is a stress symptom, possibly to earlier cold temperatures, rapidly fluctuating temperatures, root restriction, heat stress, etc. Rhubarb does best in locations that receive morning-early afternoon sun and late afternoon shade.Rhubarb likes rich soil high in organic matter.

We think the insect is Pennsylvania leatherwing (a.k.a. soldier beetle)- a beneficial insect: https://extension.umd.edu/hgic/topics/predatory-beetles
Jon