Distribution, Feeding Habits and Dispersal of Lygaeus equestris (Heteroptera) Larvae in Relation to Food Supply

Abstract

The diurnal distribution, feeding activity and dispersal of L. equestris (L.) larvae was studied in microhabitats differing in food supply. Vertical movements between ground and plants are affected by microclimate and food distribution. Differences between 1st and 3rd instar larvae concerning their daytime vertical distribution are probably the result of different microclimatic preferences. The larvae rapidly respond to changes in food supply and distribution. Thus the dispersal rate increases at food storage. Likewise feeding up on plants seems to be mainly a consequence of food shortage on the ground. Larvae deprived of seeds are able to complete the 1st instar if fed only green parts of plants.