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Plants of the genus  Eucalyptus , cultivated in many countries, have great importance for the world economy. In Brazil, this culture occupies a total of 5.7 million hectares, but native and exotic insect pests can reduce its productivity.  Thaumastocoris peregrinus  Carpintero & Dellapé (Hemiptera: Thaumastocoridae), an exotic Australian pest, damages  Eucalyptus  plants. Biological control using the egg parasitoid  Cleruchoides noackae  Lin & Huber (Hymenoptera: Mymaridae), Heteroptera predators and entomopathogenic fungi, such as  Beauveria bassiana  and  Metarhizium anisopliae , have potential for managing  T. peregrinus . Chemical insecticides, including bifenthrin and acetamiprid + bifenthrin, also control this insect. The compatibility of chemical and biological control methods favors integrated pest management. The objective of this study was to evaluate the selectivity of commercial products based on  B. bassiana ,  M. anisopliae  and the chemical bifenthrin on the parasitoid  C. noackae  and its parasitism on  T. peregrinus  eggs. The selectivity test followed the standards recommended by the International Organization for Biological Control (IOBC).  Beauveria bassiana  has selectivity to parasitism as well as viability, but was slightly harmful to  C. noackae  adults;  M. anisopliae  was innocuous to adults and to the viability of the offspring of this parasitoid, but it reduced the parasitism rate; and bifenthrin did not show selectivity to this parasitoid.

Selectivity of mycoinsecticides and a pyrethroid to the egg parasitoid Cleruchoides noackae (Hymenoptera: Mymaridae)