Figure 2. Daily oviposition patterns of Ostrinia furnacalis in a no-choice bioassay. Ten mated females were introduced into an open 4500 cm³ plastic container covered with wax paper as oviposition substrates and allowed to oviposit for four consecutive photoperiods with a scotophase of 10 hours from 21:00 P.M. to 7:00 A.M. as indicated. The egg masses deposited on wax paper were counted at 2-hour intervals. The oviposition rate was the number of egg masses deposited within each 2-hour interval divided by the total number of egg masses oviposited in each light cycle. Oviposition rates represent the mean ± SE and average from 4 replicates.