Dodder is a parasitic flowering plant that attacks many crops, including blueberry.

Symptoms.
Blueberry bushes are covered with the yellow to orange vinelike strands that are the leafless stems of the dodder plant. Heavily infected blueberry bushes are stunted with reddish leaves and reduced yields.

Disease cycle
Dodder reproduces by small, brown seeds that can remain viable in soil for 30 years. Upon germination early in the spring, the seedling coils itself around the host plant, penetrates the epidermis, and obtains nutrients via embedded haustoria (feeding structures). A single dodder plant can spread 4.5 to 7.5 meters per year.

Management
Physically remove and burn dodder before it sets seed; scout fields next to irrigation ponds for infestation (seeds can spread via irrigation water); practice good weed control to remove other hosts; use preemergence herbicides; wipe with glyphosate.