White tiny hairs on purple sweet potato leaves - Ask Extension
Can you tell me what the line of tiny white hair like structures that are growing down the spine of leaf are? They don't rub off. They are much smalle...
White tiny hairs on purple sweet potato leaves #817073
Asked November 30, 2022, 11:30 AM EST
Can you tell me what the line of tiny white hair like structures that are growing down the spine of leaf are? They don't rub off. They are much smaller than mealy bugs. Does the leaf do this naturally or is there a problem
Thank you for contacting the University of Minnesota Extension.
You did not indicate if the tiny white hairs are on the tops or underneath the leaves. Is this a plant you brought inside for the winter? If so, did this happen when it was outdoors? Is this affecting the vibrancy or growth of the plant? Is it on all the leaves or only some.
I don't think this is something that grows from the plant itself. I am unable to find any research indicating a pest or disease that would fit your description. I would ensure the plant has not been overwatered.
My guess is that these are adventitious air roots forming. You can see some in the picture. The lighting may be helping these to form on the top of the leaves. I'd leave them and see what develops, maybe try planting the leaf.jw Julie Weisenhorn, M.A., M.Ag Associate Extension Professor and Educator UMN Department of Horticultural ScienceMinnesota Landscape Arboretum, 3675 Arboretum DrIve, Chaska, MN 55318
This work is supported in part by New Technologies for Ag Extension grant no. 2020-41595-30123 from the USDA National Institute of Food and Agriculture. Any opinions, findings, conclusions, or recommendations expressed in this publication are those of the author(s) and do not necessarily reflect the view of the U.S. Department of Agriculture.