What's wrong with my cabbage plants?

Asked June 29, 2019, 9:00 PM EDT


I am new to Colorado and am attempting a vegetable garden. I live in the Westminster/Broomfield area. Can you tell me what's wrong with my cabbage plants? The center leaves are all curled and yellowed, covered with little white bumps. I tried searching on line but had no luck. Pics attached.

Thanks in advance for your help!

Suzanne Dailey

Jefferson County Colorado

2 Responses

Hi Suzanne,

This could be a few things. Could be Powdery Mildew (http://ipm.ucanr.edu/PMG/PESTNOTES/pn7406.html ), or honeydew (waste) from insects which have been feeding on the plans. It is very difficult to tell based on the pictures what insects may be present on the cabbage plants.You will have to do a bit of investigation, but I think the following three web pages may be of some assistance:

Hello Suzanne,
A magnified view of the photos shows the cabbage plants to be heavily infested with Cabbage Aphids. Aphids are soft-bodied and can often be killed with a strong jet of water. Insecticidal soap can also be applied. There are insecticides labelled for aphid control, but must be used according to the label, especially w.r.t. which vegetables can be treated with a given pesticide, time required before harvest, etc.


Best regards,