METHOD: Fecundity METHOD NARR: Cohorts from the base CPB population were reared for 10 consecutive generations on each of three hosts (tbr, ber 473331 & 473334). Fecundity is measured. Size and appearance of fat body, ovaries an examined. RESULTS NARR: Ovaries of females reared on ber were less well developed than on tbr. In contrast, fat bodies were more developed on females reared on ber. The midgut of tbr fed females was white or pink in colwere brown or gray, enlarged and contained large amounts of undigested plant material. Ber fed females also showed dark hardened pellets in posterior midgut which seemed to be undigested trichomes. AUTHOR EXPLANATION: This wation of the Ph.D dissertation of F.H. Franca and much of the growth and background information is found there. Author suggests different interpretations of data. Lack of ability to use ber may decrease size of ovaries and increase fInefficient foliage use may also lead to overload of the digestive system. Reduced fecundity on ber is probably due in part to physiological and morphological abnormalities.