Effects of Allelochemics on the Black Cutworm, Agrotis ipsilon:1 Effects of Resorcinol, Phloroglucinol, and Gallic Acid on Larval Growth, Development, and Utilization of Food2

Further evidence is presented in support of the hypothesis that allelochemics may exert chronic effects on rates of larval growth, ingestion, and utilization of food. Resorcinol inhibited ingestion and growth, but did not inhibit pupation or pupal weight of the black cutworm, Agrotis ipsilon (Hufnagel). Phloroglucinol inhibited survival, growth, and pupation. It inhibited growth by reducng the efficiency of conversion of assimilated food and the efficiency of conversion of ingested food. Gallic acid inhibited growth, survival, pupation, and assimilation of food.