There has been one unique success for combating leafhoppers killing alfalfa crops in southern California.
Managing huge populations of leafhoppers in southern California can be difficult. Chemical treatments also kill the natural defenses of the pest. However a random test of a different varietal, hairy alfalfa, has proven to show zero affects of the bug. Cooperative Extension Entomologist Dr. Vonny Barlow says researchers aren’t exactly sure why the varietal is working.