Morphological and Morphometric Parameters of the Reproductive Organs of Euschistus heros (Hemiptera: Pentatomidae) Treated With a Sublethal Juvenile Hormone Analog

The stinkbug Euschistus heros is an important pest of Brazilian agricultural production with increasing importance in the Neotropical region. High reproductive potential and increased risk resistance to insecticides are determining factors influencing its status. This work evaluated effects pyriproxyfen on reproduction morphological development system E. heros. Pyriproxyfen was utilized at sublethal concentrations (LC30) fourth-instar nymphs (N4). Sublethal resulted a reduction fertility fecundity 2 12% when only males were treated, 47 53% females 32 46% treated. Basal oocytes larger more previtellogenic newly emerged pyriproxyfen-treated females. nuclear area testicular accessory cells shrunk after 10 15 days age treated insects. Similarly, shape altered, changing from ellipsoid obpyriform pattern, characterized by hypertrophy basal region over time. apparent organ grew until ten age, then age. In summary, treatments disrupted normal N4 diminished female male adults.