The fact that these insects migrate during the spring and summer time to cultivated fields also means that they show a lot of variation in their host plant choices by season: feeding on desert weeds in the winter and feeding on cultivated fields in the summer. They also show incredible variation in food choices between populations in different states, and these choices may change depending on host plant diversity, availability, defenses, etc.
The seasonal migration of these insects to cultivated fields reveals a notable fluctuation in their host plant preferences: desert weeds during winter and cultivated fields during summer. Furthermore, there is considerable variation in food choices among populations across different states, which can be influenced by factors such as host plant diversity, availability, and defenses.