Effects of methyl isothiocyanate on forest insect pests.
Ten species of forest pests were fumigated with methyl isothiocyanate (at 10, 20 and 40 g/m3) for 24 h at 15°C. At 10 g/m3, methyl isothiocyanate achieved complete mortality of Monochamus alternatus (pupa), Cryphalus fulvus (all stages), Phloeosinus perlatus (larva, pupa and adult) and Pissodes nitidus (larva), while some survival of Monochamus alternatus (larva) and Pissodes nitidus (pupa and adult) was observed. Complete mortality of Semanotus japonicus (egg), Callidiellum rufipenne (all stages), Monochamus alternatus (egg), Ips cembrae (all stages) and Pissodes nitidus (egg and pupa) was observed at 20 g/m3, and Monochamus alternatus (larva) at 40 g/m3. However, complete mortality of Xyleborus validus, X. pfeili and X. germanus was not achieved at 40 g/m3.