Antibiosis of Eucalyptus plants on Podisus nigrispinus

作者：Holtz Anderson Mathias; Pallini Angelo; Venzon Madelaine; Zanuncio Jose Cola; Pratissoli Dirceu; Barbosa Wagner Faria^*; Andrade Gilberto Santos

来源：Phytoparasitica, 2010, 38(2): 133-139.

DOI：10.1007/s12600-010-0083-y

• Biological control
• Eucalyptus
• Eucalyptus urophylla
• Guava
• Predator
• Psidium guajava
• Secondary compounds

The predator Podisus nigrispinus (Dallas) (Heteroptera: Pentatomidae) has been used as a natural enemy to control herbivorous insects in eucalyptus plantations. However, because of the short co-evolutionary history of the predator with this imported plant species, the defensive compounds of eucalyptus may have a negative effect on the predator. Therefore, the survival and development of P. nigrispinus were studied on eucalyptus (Eucalyptus urophylla; exotic host plant) and guava (Psidium guajava; native host plant). P. nigrispinus performance was indeed superior on guava plants than on eucalyptus. The number of fertile eggs and nymphal survival were 52.6% and 12.0% on guava compared with 20.0% and 1.3% on eucalyptus, respectively. Longevity of P. nigrispinus was 115 days on guava and 98 days on eucalyptus. This shows that the predator is not yet fully adapted to the exotic host plant. One possible reason is that the plant toxic compounds in eucalyptus act on this predator by antibiosis.

• 出版日期2010-4