Identification and Characterization of Resistance of Three Aphid Species on Contrasting Alfalfa Cultivars.

Aphids on alfalfa () including Koch (cowpea aphid, CPA), Harris (pea aphid, PA) and Buckton (spotted alfalfa aphid, SAA) cause significant yield losses worldwide. In this experiment, the development of these three species of aphids on 16 alfalfa cultivars was compared. The results showed that the plant cultivar had a significant influence on the development of aphids as there are significant differences in the body weight of aphids reared on different alfalfa cultivars.