armigera passed through six
instars in all treatments.
Duration (days) (X [+ o -] SE) of Chrysoperla externa
instars, whose larvae were fed with different preys, in laboratory (25[grados]C, RU 70 %, Photophase 12 h), DF = 27.
Duration (days) of nymphal
instars (mean [+ or -] SE) and survival of Stiretrus decastigmus (Hemiptera: Pentatomidae) fed on Microtheca ochroloma (Coleoptera: Chrysomelidae) larvae at 20, 25, and 30[degrees]C.
Overlapping in measurement extremes between
instars was registered for all structures analysed from both populations (Figure 1).
Adult grasshoppers often appear strikingly different from their fifth
instars, both in form and coloration.
Each cup was provided with treated leaves and ten 2nd
instar or five 4th
instar larvae.
In the summer nymphs of Corrientes, 72.2% of individuals were males and 27.8% females; males required only five
instars to complete nymphal development, whereas females required six.
First and second
instar larvae fed on the leaf epidermis while other
instar larvae fed on all the laminae but not on the 1st and 2nd order veins.
Some differences in morphology of larval
instars I and II were found.
The presence of primary spiniform frontoclypeai sensilla provides an overt character that increases the probability of identifying first
instars R.
Three silkworm larvae in 2nd, 4th and 6th day of fifth
instar were picked from each replication and were chilled in a refrigerator for a few minutes.