Abstract
Methyl palmitate reduced the survival of group-reared larvae of Gryllodes sigillatus (Walk.) but not that of singly reared larvae, and inhibited wing development. Methyl linolenate and methyl linoleate inhibited wing development with little or no effect on growth. The incidence of wing development was much greater with group-reared larvae than it was with singly reared larvae when a 'selected' strain of the insect was used.