What's wrong with my cabbage plants?
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!
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.
- CSU PlantTalk on Aphids https://planttalk.colostate.edu/topics/insects-diseases/1402-aphids/
- Cabbage Aphid U Fla http://entnemdept.ufl.edu/creatures/veg/aphid/cabbage_aphid.htm
- Cabbage Aphid (U Cal) http://ipm.ucanr.edu/PMG/r108300811.html