Dry leaves of Physalis peruviana gave the glycoside esters 1 and 2 of
oxy-1alpha,3beta-dihydroxyergosta-5,24-dien-26-oic acid in yields of 1
70 and 90 mg.kg-1, respectively. Both 1 and 2 reduce the growth of Hel
icoverpa zea larvae to 50% of a control size at a concentration of ca.
35 mg.kg-1 in artificial diets.